HiTech Catalog

Roller and Ball Bearings Design Guide

NHBBRoller and Ball Bearings Design Guide

HITECH DIvIsIon

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IntroductionHiTech Division

SUPPORTING THE SUCCESS OF OUR CUSTOMERSCommitment. Knowledge. vision.At NHBB, we know that a strong supplier relationship begins with an unequivocal commitment to addressing the needs of our customers. We demonstrate this commitment every day with our ability to respond to the complex performance requirements of components used in critical applications in a competitive marketplace. Its also about the value of collaboration. The products we supply typically evolve from a customer concept where requirements and specifications are defined and developed throughout the process. Being closely involved during the development phase, and continually responding to the many challenges that occur throughout the production years, clearly defines our business approach. At NHBB, weve been evolving in a consistent direction for many years, instructed by experiences that have added to our strong technical foundation. That knowledge enables us to continually advance our expertise in efficiency, quality, and innovation, and it provides the opportunity to reinforce our position in the global aerospace supply chain. And while weve reached a significant level of capability and expertise, we continually strive to meet the ever-changing challenges of designing and producing high value, complex products. Such persistence is supported by a constant investment in our facility and our technical capabilities. From state-of-the-art machine centers for milling tight tolerance components and grinding complex features, to advanced heat-treatment equipment, to rigorous in-process quality control protocols, and to a certified clean room for assembly, our factory reflects a long-term commitment to aligning our capacity and our capabilities to the current and future needs of our customers. We invite you to review our design guide. It is intended to be just one part of the total resource package we provide to our customers in support of their success. This guide represents a starting point for a variety of the concepts and considerations necessary to initiate a bearing design, and it reinforces our readiness to work together to find the best solutions possible.

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IntroductionCapabilities

PRODUCTS Complex ball and roller bearings Bearing sizes through 300 mm O.D. Cylindrical roller bearings Ball bearings Angular contact Gothic arch Duplex/super duplex Torque tube Thin section

QUALITY CERTIFICATIONS ISO 9001:2000 AS9100, Rev B Boeing D6-82479 Nadcap: AC7102 Heat-treating including carburizing AC7108 Chemical processing including passivation AC7114 Nondestructive testing

ENVIRONMENTAL MANAGEMENT CERTIFICATION ISO 14001:2004

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Table of Contents

Introduction 06 Part numbering system

Cylindrical Roller Bearings, Metric Series 09 10 11 12 13 Bore sizes 10-25 mm Bore sizes 30-55 mm Bore sizes 60-85 mm Bore sizes 90-130 mm Bore sizes 140-200 mm

Ball Bearings, Metric SeriesRadial

15 16 17 18 19

Bore sizes 10-25 mm Bore sizes 30-55 mm Bore sizes 60-85 mm Bore sizes 90-130 mm Bore sizes 140-200 mm

Angular Contact

20 21 22 23 24

Bore sizes 10-25 mm Bore sizes 30-55 mm Bore sizes 60-85 mm Bore sizes 90-130 mm Bore sizes 140-200 mm

Ball Bearings, Inch Series 25 26 27 28 30 Radial Torque Tube Radial Torque Tube Angular Contact Thin section Radial and Gothic Arch Thin section Angular Contact

Special Products 33 Complex Bearing Assemblies with Customized Features

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Table of Contents

Engineering 37 39 43 44 46 48 52 53 56 56 58 59 59 60 61 62 Materials Internal Bearing Geometry Roller Bearing Features Load Ratings and Bearing Life Preload and Duplex Bearings shaft and Housing Fits seals and shields Cage Types Lubrication Platings and Coatings Tolerances Ball Grades silicon nitride Balls Engineering Analysis and Reporting Temperature Conversion Table Inch/Metric Conversion Table

New Hampshire Ball Bearings, Inc. 63 64 65 66 67 Company overview Astro Division, Laconia, nH Precision Division, Chatsworth, CA myonicusa ,

Chatsworth, CA

Minebea Co., Ltd.

nHBB reserves the right to change specifications and other information included in this catalog without notice. All information, data and dimension tables in this catalog have been carefully compiled and thoroughly checked and are provided on an as is basis for informational purposes only. nHBB assumes no responsibility and/or liability whatsoever for any errors or omissions in these materials. All materials in this catalog are protected by copyright laws and may not be reproduced, republished, or otherwise exploited in any manner without the express written permission of nHBB. nHBB names, logos and all related trademarks, tradenames, and other intellectual property (including nHBB part numbers, series numbers, and the like) are the property of nHBB and cannot be used without nHBB's express written permission.

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IntroductionPart Numbering System Cylindrical Roller Bearings

EXAMPLE: MTTPULS105-5MT MATERIAL No Code=52100 chrome steel MT=M50 tool steel SB=BG42 SS=440C stainless steel TP ALL ROLLERS TP U OUTER RING CONFIGURATION U=Double guide flange L=Single guide flange S=No guide flanges L INNER RING CONFIGURATION U=Double guide flange L=Single guide flange S=No guide flanges S CAGE MATERIAL B=Bronze or brass S=Steel 105 BASIC SIZE ABMA dimension series 18, 19, 10, 02 and 03 indicated by 18, 19, 1, 2 and 3 followed by bore size of: 00 for 10 mm 01 for 12 mm 02 for 15 mm 03 for 17 mm 04 for 20 mm 05 for 25 mm etc. in 5 mm increments 5 DASH NUMBER Unique number assigned within each dimension series identifying special features

The roller bearing part numbering system is designed to identify the important basic features of the bearing while providing a unique part number. Complete bearing details are available on nHBB sales drawings.

BG42 is a registered trademark of Latrobe specialty steel Company.

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IntroductionPart Numbering System Ball Bearings

EXAMPLE: MTMER-1905SDXXXDB20R6A5MT MATERIAL No Code=52100 chrome steel CE=52100 rings, ceramic balls MT=M50 tool steel SB=BG42 SE=440C rings, ceramic balls SH=Cobalt based alloy SS=440C stainless steel TE=M50 rings, ceramic balls MERTYPE F=Flanged GR=Gothic arch R,RI=Radial RW=Radial with cartridge width MBR=Inner ring relieved, separable MDR=Inner ring relieved, nonseparable MER=Outer ring relieved, nonseparable W=Fractured outer ring 1905 BASIC NUMBER Inch Series: First 1-3 digits indicate O.D. in 16ths of an inch, the bore size is the next 2-3 digits Metric Series: ABMA Dimension series 18, 19, 10, 02 and 03 indicated by 18, 19, 1, 2 and 3 followed by bore size of: 00 for 10 mm 01 for 12 mm 02 for 15 mm 03 for 17 mm 04 for 20 mm 05 for 25 mm etc. in 5 mm increments CLOSURES D=Rubber seal DD1=Molded, snap-in seal H=Metallic shield L=Glass reinforced PTFE shield S=Noncontact rubber seal Z=Metallic shield, removable SDXXX SPECIAL DESIGN SD __ __ __ , 3 digit number assigned by NHBB engineering, denotes special design features DB20 DUPLEX DB=Back to back DF=Face to face DT=Tandem DU=Universal The number following the 2 digit alpha code (e.g. DB) equals preload value in pounds R6 CAGES F=None, full complement R=Two-piece ribbon, steel R6=Riveted ribbon, steel B2=Two-piece riveted, bronze B5=Machined, silicon-iron bronze KE=Crown, inner land piloted, phenolic KM=Fully machined, inner land piloted, phenolic M2=One-piece machined, silver plated steel A5 TOLERANCE A1=ABEC 1* A3=ABEC 3 A5=ABEC 5 A7=ABEC 7 A9=ABEC 9 *A1 miniature and instrument bearings of both the metric and inch configurations meet the tolerances of ABMA Standard 20 for ABEC 1 metric series bearings

The above descriptions indicate the most common options; additional types exist. Beyond the basic part number, nHBB may also show specifications such as coding, radial play, torque, lubricant and packaging. These features are not part of the basic number.

BG42 is a registered trademark of Latrobe specialty steel Company.

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Cylindrical Roller BearingsMetric Series Bore sizes 10-25 mmrB

TPLL

TPLU

TPSU

TPUS

Lo

Li

d

D

TPUL

TPU inner

TPU outer

TPUU

TPUU

BASIC P/N mm TP1900 TP100 TP200 TP300 TP1901 TP101 TP201 TP301 TP1902 TP102 TP202 TP302 TP1903 TP103 TP203 TP303 TP1804 TP1904 TP104 TP204 TP304 TP1805 TP1905 TP105 TP205 TP305 10 10 10 10 12 12 12 12 15 15 15 15 17 17 17 17 20 20 20 20 20 25 25 25 25 25

BORE d INCH .3937 .3937 .3937 .3937 .4724 .4724 .4724 .4724 .5906 .5906 .5906 .5906 .6693 .6693 .6693 .6693 .7874 .7874 .7874 .7874 .7874 .9843 .9843 .9843 .9843 .9843 mm 22 26 30 35 24 28 32 37 28 32 35 42 30 35 40 47 32 37 42 47 52 37 42 47 52 62

O.D. D INCH .8661 1.0236 1.1811 1.3780 .9449 1.1024 1.2598 1.4567 1.1024 1.2598 1.3780 1.6535 1.1811 1.3780 1.5748 1.8504 1.2598 1.4567 1.6535 1.8504 2.0472 1.4567 1.6535 1.8504 2.0472 2.4409 mm 6 8 9 11 6 8 10 12 7 9 11 13 7 10 12 14 7 9 12 14 15 7 9 12 15 17

WIDTH B INCH .2362 .3150 .3543 .4331 .2362 .3150 .3937 .4724 .2756 .3543 .4331 .5118 .2756 .3937 .4724 .5512 .2756 .3543 .4724 .5512 .5906 .2756 .3543 .4724 .5906 .6693

NOMINAL ROLLER PATH DIA. INNER OUTER INCH INCH .4923 .5116 .5910 .6694 .5777 .5909 .6299 .7103 .7088 .7382 .7485 .8229 .7877 .8366 .8782 .9232 .8858 .9352 .9449 1.0199 1.0235 1.0847 1.1429 1.1419 1.2003 1.3211 .7679 .9053 .9847 1.1812 .8532 .9846 1.1024 1.2615 .9844 1.1319 1.2210 1.4529 1.0633 1.2303 1.3900 1.6319 1.1614 1.3289 1.4961 1.6498 1.8109 1.3583 1.5366 1.6931 1.8303 2.1873

MOUNTING SHOULDER DIA. MIN. SHAFT MAX. HOUSING Lo Li INCH INCH .472 .482 .558 .571 .559 .560 .616 .676 .678 .682 .737 .792 .742 .767 .811 .872 .879 .878 .922 .975 .994 1.060 1.075 1.131 1.151 1.206 .788 .929 1.025 1.202 .862 1.016 1.116 1.263 1.027 1.166 1.239 1.452 1.107 1.288 1.425 1.640 1.172 1.371 1.519 1.667 1.849 1.380 1.569 1.702 1.861 2.223

FILLET RADIUS r INCH .012 .012 .024 .024 .012 .012 .024 .039 .012 .012 .024 .039 .012 .012 .024 .039 .012 .012 .024 .039 .039 .012 .012 .024 .039 .039

ROLLER DIA. & LENGTH NO. mm 10 8 8 8 10 8 8 8 14 10 10 8 14 12 10 8 16 14 10 10 8 18 16 12 12 10 3.5 5 5 6.35 3.5 5 6 7 3.5 5 6 8 3.5 5 6.35 9 3.5 5 7 8 10 3.5 5 7 8 11

LOAD RATINGS LBS DYN. C 1100 1800 1800 2900 1100 1800 2500 3400 1400 2150 2950 4400 1400 2450 3600 5400 1550 2750 4000 5200 6650 1700 3050 4600 5950 9300 STATIC Co 790 1250 1250 2000 810 1250 1750 2400 1200 1650 2250 3200 1200 2050 2850 4000 1400 2450 3250 4250 5050 1600 2850 4050 5300 7750

Notes:1. nHBB typically manufactures roller bearings in both 52100 and M50 material to ABEC 5 tolerances per ABMA standard 20. other materials and tolerances are available. 2. All cages are metallic and one-piece machined. 3. standard rollers have equal length and diameter. Rectangular rollers, typically under a 2:1 length-to-diameter ratio, are also available. 4. Custom features such as puller grooves, mounting flanges and anti-rotation devices can be designed into all ring configurations. 5. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear.

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TPLL

TPLU

TPSU

TPUS

Lo

Li

d

D

TPUL

TPU inner

TPU outer

TPUU

TPUU

BASIC P/N mm TP1806 TP1906 TP106 TP206 TP306 TP1807 TP1907 TP107 TP207 TP307 TP1808 TP1908 TP108 TP208 TP308 TP1809 TP1909 TP109 TP209 TP309 TP1810 TP1910 TP110 TP210 TP310 TP1811 TP1911 TP111 TP211 TP311 30 30 30 30 30 35 35 35 35 35 40 40 40 40 40 45 45 45 45 45 50 50 50 50 50 55 55 55 55 55

BORE d INCH 1.1811 1.1811 1.1811 1.1811 1.1811 1.3780 1.3780 1.3780 1.3780 1.3780 1.5748 1.5748 1.5748 1.5748 1.5748 1.7717 1.7717 1.7717 1.7717 1.7717 1.9685 1.9685 1.9685 1.9685 1.9685 2.1654 2.1654 2.1654 2.1654 2.1654 mm 42 47 55 62 72 47 55 62 72 80 52 62 68 80 90 58 68 75 85 100 65 72 80 90 110 72 80 90 100 120

O.D. D INCH 1.6535 1.8504 2.1654 2.4409 2.8346 1.8504 2.1654 2.4409 2.8346 3.1496 2.0472 2.4409 2.6772 3.1496 3.5433 2.2835 2.6772 2.9528 3.3465 3.9370 2.5591 2.8346 3.1496 3.5433 4.3307 2.8346 3.1496 3.5433 3.9370 4.7244 mm 7 9 13 16 19 7 10 14 17 21 7 12 15 18 23 7 12 16 19 25 7 12 16 20 27 9 13 18 21 29

WIDTH B INCH .2756 .3543 .5118 .6299 .7480 .2756 .3937 .5512 .6693 .8268 .2756 .4724 .5906 .7087 .9055 .2756 .4724 .6299 .7480 .9843 .2756 .4724 .6299 .7874 1.0630 .3543 .5118 .7087 .8268 1.1417

NOMINAL ROLLER PATH DIA. INNER OUTER INCH INCH 1.2795 1.3288 1.4116 1.4579 1.5219 1.4764 1.5470 1.6100 1.6946 1.7126 1.6735 1.7327 1.7718 1.9130 1.9607 1.8899 1.9486 2.0258 2.0725 2.1852 2.1260 2.1267 2.2227 2.2698 2.4393 2.3031 2.3956 2.4427 2.5004 2.7343 1.5551 1.7225 1.9628 2.2454 2.5455 1.7520 2.0195 2.2400 2.5607 2.8150 1.9491 2.2839 2.4805 2.8579 3.2206 2.1655 2.4998 2.7344 3.0962 3.5238 2.4016 2.6779 2.9314 3.2934 3.9353 2.6969 2.9467 3.3088 3.6028 4.2304

MOUNTING SHOULDER DIA. MIN. SHAFT MAX. HOUSING Lo Li INCH INCH 1.255 1.265 1.360 1.375 1.415 1.450 1.517 1.562 1.585 1.685 1.650 1.708 1.758 1.795 1.890 1.875 1.912 1.957 1.980 2.080 2.102 2.107 2.152 2.183 2.357 2.281 2.361 2.396 2.444 2.555 1.589 1.765 1.985 2.285 2.600 1.770 2.030 2.257 2.624 2.846 1.960 2.302 2.499 2.933 3.243 2.190 2.537 2.760 3.135 3.625 2.395 2.696 2.963 3.334 3.949 2.720 2.953 3.314 3.654 4.334

FILLET RADIUS r INCH .012 .012 .039 .039 .039 .012 .024 .039 .039 .059 .012 .024 .039 .039 .059 .012 .024 .039 .039 .059 .012 .024 .039 .039 .079 .012 .039 .039 .059 .079

ROLLER DIA. & LENGTH NO. mm 20 18 14 12 10 22 18 14 12 10 24 18 14 12 10 28 20 16 12 10 32 20 18 14 10 30 24 16 14 12 3.5 5 7 10 13 3.5 6 8 11 14 3.5 7 9 12 16 3.5 7 9 13 17 3.5 7 9 13 19 5 7 11 14 19

LOAD RATINGS LBS DYN. C 1800 3300 5150 9050 12900 1950 4550 6700 10700 14700 2100 6200 8250 12600 19100 2350 6750 9100 14800 21500 2600 6750 9950 16600 26600 4850 7700 13200 18900 30500 STATIC Co 1800 3300 4900 8150 11100 2050 4650 6500 9900 12900 2250 6500 8100 12000 17100 2650 7300 9450 14300 19700 3050 7400 10700 16900 24900 5850 9000 14100 19600 30600


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TPLL

TPLU

TPSU

TPUS

Lo

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TPUL

TPU inner

TPU outer

TPUU

TPUU


BORE d INCH 2.3622 2.3622 2.3622 2.3622 2.3622 2.5591 2.5591 2.5591 2.5591 2.5591 2.7559 2.7559 2.7559 2.7559 2.7559 2.9528 2.9528 2.9528 2.9528 2.9528 3.1496 3.1496 3.1496 3.1496 3.1496 3.3465 3.3465 3.3465 3.3465 3.3465 mm 78 85 95 110 130 85 90 100 120 140 90 100 110 125 150 95 105 115 130 160 100 110 125 140 170 110 120 130 150 180

O.D. D INCH 3.0709 3.3465 3.7402 4.3307 5.1181 3.3465 3.5433 3.9370 4.7244 5.5118 3.5433 3.9370 4.3307 4.9213 5.9055 3.7402 4.1339 4.5276 5.1181 6.2992 3.9370 4.3307 4.9213 5.5118 6.6929 4.3307 4.7244 5.1181 5.9055 7.0866 mm 10 13 18 22 31 10 13 18 23 33 10 16 20 24 35 10 16 20 25 37 10 16 22 26 39 13 18 22 28 41

WIDTH B INCH .3937 .5118 .7087 .8661 1.2205 .3937 .5118 .7087 .9055 1.2992 .3937 .6299 .7874 .9449 1.3780 .3937 .6299 .7874 .9843 1.4567 .3937 .6299 .8661 1.0236 1.5354 .5118 .7087 .8661 1.1024 1.6142




ROLLER DIA. & LENGTH NO. mm 32 22 18 14 12 28 26 18 14 12 30 24 18 14 12 32 24 18 14 12 34 26 20 16 12 34 24 20 14 12 5 7 11 16 20 6 7 11 16 22 6 9 13 17 24 6 9 13 18 26 6 9 13 18 28 7 11 14 20 28



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TPLL

TPLU

TPSU

TPUS

Lo

Li

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D

TPUL

TPU inner

TPU outer

TPUU

TPUU


BORE d INCH 3.5433 3.5433 3.5433 3.5433 3.5433 3.7402 3.7402 3.7402 3.7402 3.7402 3.9370 3.9370 3.9370 3.9370 4.1339 4.1339 4.1339 4.1339 4.3307 4.3307 4.3307 4.3307 4.7244 4.7244 4.7244 4.7244 5.1181 5.1181 5.1181 5.1181 mm 115 125 140 160 190 120 130 145 170 200 125 140 150 180 130 145 160 190 140 150 170 200 150 165 180 215 165 180 200 230

O.D. D INCH 4.5276 4.9213 5.5118 6.2992 7.4803 4.7244 5.1181 5.7087 6.6929 7.8740 4.9213 5.5118 5.9055 7.0866 5.1181 5.7087 6.2992 7.4803 5.5118 5.9055 6.6929 7.8740 5.9055 6.4961 7.0866 8.4646 6.4961 7.0866 7.8740 9.0551 mm 13 18 24 30 43 13 18 24 32 45 13 20 24 34 13 20 26 36 16 20 28 38 16 22 28 40 18 24 33 40

WIDTH B INCH .5118 .7087 .9449 1.1811 1.6929 .5118 .7087 .9449 1.2598 1.7717 .5118 .7874 .9449 1.3386 .5118 .7874 1.0236 1.4173 .6299 .7874 1.1024 1.4961 .6299 .8661 1.1024 1.5748 .7087 .9449 1.2992 1.5748




ROLLER DIA. & LENGTH NO. mm 36 24 20 16 12 38 26 20 16 12 40 24 20 14 42 24 20 14 34 26 18 14 38 26 20 14 36 26 20 16 7 11 15 20 30 7 11 16 22 32 7 12 16 25 7 12 17 26 9 12 19 28 9 14 19 30 10 15 20 30


20100 38300 33900 45500 47800 61200 87000 106500


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TPLL

TPLU

TPSU

TPUS

Lo

Li

d

D

TPUL

TPU inner

TPU outer

TPUU

TPUU

BASIC P/N mm TP1828 TP1928 TP128 TP228 TP1830 TP1930 TP130 TP1832 TP1932 TP132 TP1834 TP1934 TP134 TP1836 TP1936 TP136 TP1838 TP1938 TP138 TP1840 TP1940 140 140 140 140 150 150 150 160 160 160 170 170 170 180 180 180 190 190 190 200 200

BORE d INCH 5.5118 5.5118 5.5118 5.5118 5.9055 5.9055 5.9055 6.2992 6.2992 6.2992 6.6929 6.6929 6.6929 7.0866 7.0866 7.0866 7.4803 7.4803 7.4803 7.8740 7.8740 mm 175 190 210 250 190 210 225 200 220 240 215 230 260 225 250 280 240 260 290 250 280

O.D. D INCH 6.8898 7.4803 8.2677 9.8425 7.4803 8.2677 8.8583 7.8740 8.6614 9.4488 8.4646 9.0551 10.2362 8.8583 9.8425 11.0236 9.4488 10.2362 11.4173 9.8425 11.0236 mm 18 24 33 42 20 28 35 20 28 38 22 28 42 22 33 46 24 33 46 24 38

WIDTH B INCH .7087 .9449 1.2992 1.6535 .7874 1.1024 1.3780 .7874 1.1024 1.4961 .8661 1.1024 1.6535 .8661 1.2992 1.8110 .9449 1.2992 1.8110 .9449 1.4961

NOMINAL ROLLER PATH DIA. INNER OUTER INCH INCH 5.8072 5.9057 6.1027 6.4176 6.1811 6.4177 6.5150 6.5748 6.7710 6.9290 7.0669 7.1650 7.4407 7.4606 7.6779 7.8742 7.9134 8.0703 8.2085 8.3071 8.5057 6.5946 7.0868 7.6775 8.9373 7.2047 7.7563 8.2479 7.5984 8.1884 8.8187 8.0905 8.5824 9.4880 8.4826 9.2527 10.2364 9.0517 9.6451 10.7085 9.4094 10.3937

MOUNTING SHOULDER DIA. MIN. SHAFT MAX. HOUSING Lo Li INCH INCH 5.760 5.840 5.939 6.132 6.150 6.340 6.435 6.530 6.720 6.875 6.980 7.070 7.380 7.410 7.600 7.820 7.840 8.030 8.150 8.220 8.415 6.630 7.140 7.845 9.220 7.244 7.825 8.310 7.618 8.270 8.880 8.170 8.670 9.590 8.540 9.350 10.360 9.150 9.770 10.830 9.495 10.500

FILLET RADIUS r INCH .039 .059 .079 .098 .039 .079 .079 .039 .079 .079 .039 .079 .079 .039 .079 .079 .059 .079 .079 .059 .079

ROLLER DIA. & LENGTH NO. mm 38 28 22 16 34 28 22 34 28 22 36 28 22 38 28 20 36 28 20 38 26 10 15 20 32 13 17 22 13 18 24 13 18 26 13 20 30 14 20 32 14 24

LOAD RATINGS LBS DYN. C STATIC Co

22300 32600 36400 50300 53100 70800 99300 123500 32300 46400 63800 46700 65400 86100

32300 46900 51900 73800 74000 105000 33700 49900 51900 74100 86400 119000 35100 52900 63600 92200 104500 141500 38400 57400 63600 92700 117500 160000 40000 60800 83900 121500


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Ball BearingsMetric Series RadialBore sizes 10-25 mmrB

Lo

Li

d

D

BASIC P/N mm R-1900 R-100 R-200 R-300 R-1901 R-101 R-201 R-301 R-1902 R-102 R-202 R-302 R-1903 R-103 R-203 R-303 R-1804 R-1904 R-104 R-204 R-304 R-1805 R-1905 R-105 R-205 R-305 10 10 10 10 12 12 12 12 15 15 15 15 17 17 17 17 20 20 20 20 20 25 25 25 25 25

BORE d INCH .3937 .3937 .3937 .3937 .4724 .4724 .4724 .4724 .5906 .5906 .5906 .5906 .6693 .6693 .6693 .6693 .7874 .7874 .7874 .7874 .7874 .9843 .9843 .9843 .9843 .9843 mm 22 26 30 35 24 28 32 37 28 32 35 42 30 35 40 47 32 37 42 47 52 37 42 47 52 62

O.D. D INCH .8661 1.0236 1.1811 1.3780 .9449 1.1024 1.2598 1.4567 1.1024 1.2598 1.3780 1.6535 1.1811 1.3780 1.5748 1.8504 1.2598 1.4567 1.6535 1.8504 2.0472 1.4567 1.6535 1.8504 2.0472 2.4409 mm 6 8 9 11 6 8 10 12 7 9 11 13 7 10 12 14 7 9 12 14 15 7 9 12 15 17

WIDTH B INCH .2362 .3150 .3543 .4331 .2362 .3150 .3937 .4724 .2756 .3543 .4331 .5118 .2756 .3937 .4724 .5512 .2756 .3543 .4724 .5512 .5906 .2756 .3543 .4724 .5906 .6693

LAND DIAMETER (REFERENCE) Lo Li INCH INCH .570 .583 .656 .717 .629 .670 .725 .777 .735 .803 .815 .934 .810 .910 .952 1.017 .948 .995 1.075 1.131 1.192 1.145 1.195 1.267 1.328 1.450 .734 .837 .919 1.055 .800 .900 1.007 1.153 .972 1.048 1.153 1.310 1.032 1.140 1.292 1.495 1.098 1.262 1.375 1.507 1.643 1.295 1.460 1.567 1.703 1.976


BALL COMPLEMENT NO. 9 7 7 6 9 7 7 6 10 9 7 7 11 10 8 7 14 9 8 8 7 17 11 10 9 7 SIZE INCH 1/8 3/16 7/32 9/32 9/64 3/16 15/64 5/16 5/32 3/16 1/4 5/16 5/32 3/16 17/64 11/32 1/8 7/32 1/4 5/16 3/8 1/8 7/32 1/4 5/16 15/32


Notes:1. Metric series radial ball bearings are typically manufactured from 52100 chrome steel to ABEC 3, 5 and 7 tolerances per ABMA standard 20. 2. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear.

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Lo

Li

d

D

BASIC P/N mm R-1806 R-1906 R-106 R-206 R-306 R-1807 R-1907 R-107 R-207 R-307 R-1808 R-1908 R-108 R-208 R-308 R-1809 R-1909 R-109 R-209 R-309 R-1810 R-1910 R-110 R-210 R-310 R-1811 R-1911 R-111 R-211 R-311 30 30 30 30 30 35 35 35 35 35 40 40 40 40 40 45 45 45 45 45 50 50 50 50 50 55 55 55 55 55

BORE d INCH 1.1811 1.1811 1.1811 1.1811 1.1811 1.3780 1.3780 1.3780 1.3780 1.3780 1.5748 1.5748 1.5748 1.5748 1.5748 1.7717 1.7717 1.7717 1.7717 1.7717 1.9685 1.9685 1.9685 1.9685 1.9685 2.1654 2.1654 2.1654 2.1654 2.1654 mm 42 47 55 62 72 47 55 62 72 80 52 62 68 80 90 58 68 75 85 100 65 72 80 90 110 72 80 90 100 120

O.D. D INCH 1.6535 1.8504 2.1654 2.4409 2.8346 1.8504 2.1654 2.4409 2.8346 3.1496 2.0472 2.4409 2.6772 3.1496 3.5433 2.2835 2.6772 2.9528 3.3465 3.9370 2.5591 2.8346 3.1496 3.5433 4.3307 2.8346 3.1496 3.5433 3.9370 4.7244 mm 7 9 13 16 19 7 10 14 17 21 7 12 15 18 23 7 12 16 19 25 7 12 16 20 27 9 13 18 21 29

WIDTH B INCH .2756 .3543 .5118 .6299 .7480 .2756 .3937 .5512 .6693 .8268 .2756 .4724 .5906 .7087 .9055 .2756 .4724 .6299 .7480 .9843 .2756 .4724 .6299 .7874 1.0630 .3543 .5118 .7087 .8268 1.1417

LAND DIAMETER (REFERENCE) Lo Li INCH INCH 1.342 1.384 1.504 1.585 1.707 1.539 1.665 1.721 1.824 1.925 1.735 1.857 1.900 2.061 2.183 1.953 2.055 2.136 2.277 2.440 2.169 2.232 2.333 2.455 2.698 2.387 2.469 2.591 2.712 2.956 1.492 1.649 1.842 2.037 2.308 1.689 1.942 2.097 2.388 2.602 1.886 2.158 2.351 2.663 2.935 2.103 2.393 2.587 2.841 3.268 2.357 2.570 2.784 3.056 3.600 2.612 2.845 3.117 3.389 3.933


BALL COMPLEMENT NO. 20 13 11 9 8 22 13 11 8 8 25 14 10 9 8 28 15 12 9 8 25 16 13 10 8 23 16 12 10 8 SIZE INCH 1/8 7/32 9/32 3/8 1/2 1/8 1/4 5/16 15/32 9/16 1/8 1/4 3/8 1/2 5/8 1/8 9/32 3/8 1/2 11/16 5/32 9/32 3/8 1/2 3/4 3/16 5/16 7/16 9/16 13/16



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16

HiTech Division


Lo

Li

d

D


BORE d INCH 2.3622 2.3622 2.3622 2.3622 2.3622 2.5591 2.5591 2.5591 2.5591 2.5591 2.7559 2.7559 2.7559 2.7559 2.7559 2.9528 2.9528 2.9528 2.9528 2.9528 3.1496 3.1496 3.1496 3.1496 3.1496 3.3465 3.3465 3.3465 3.3465 3.3465 mm 78 85 95 110 130 85 90 100 120 140 90 100 110 125 150 95 105 115 130 160 100 110 125 140 170 110 120 130 150 180

O.D. D INCH 3.0709 3.3465 3.7402 4.3307 5.1181 3.3465 3.5433 3.9370 4.7244 5.5118 3.5433 3.9370 4.3307 4.9213 5.9055 3.7402 4.1339 4.5276 5.1181 6.2992 3.9370 4.3307 4.9213 5.5118 6.6929 4.3307 4.7244 5.1181 5.9055 7.0866 mm 10 13 18 22 31 10 13 18 23 33 10 16 20 24 35 10 16 20 25 37 10 16 22 26 39 13 18 22 28 41

WIDTH B INCH .3937 .5118 .7087 .8661 1.2205 .3937 .5118 .7087 .9055 1.2992 .3937 .6299 .7874 .9449 1.3780 .3937 .6299 .7874 .9843 1.4567 .3937 .6299 .8661 1.0236 1.5354 .5118 .7087 .8661 1.1024 1.6142



BALL COMPLEMENT NO. 22 17 12 10 8 23 18 13 10 8 25 17 13 10 8 26 17 14 10 8 28 17 13 10 8 24 16 13 10 8 SIZE INCH 7/32 5/16 7/16 5/8 7/8 7/32 5/16 7/16 11/16 15/16 7/32 11/32 1/2 11/16 1 7/32 3/8 1/2 11/16 1-1/16 7/32 3/8 9/16 3/4 1-1/8 9/32 7/16 9/16 13/16 1-1/8



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17

HiTech Division


Lo

Li

d

D


BORE d INCH 3.5433 3.5433 3.5433 3.5433 3.5433 3.7402 3.7402 3.7402 3.7402 3.7402 3.9370 3.9370 3.9370 3.9370 4.1339 4.1339 4.1339 4.1339 4.3307 4.3307 4.3307 4.3307 4.7244 4.7244 4.7244 4.7244 5.1181 5.1181 5.1181 5.1181 mm 115 125 140 160 190 120 130 145 170 200 125 140 150 180 130 145 160 190 140 150 170 200 150 165 180 215 165 180 200 230

O.D. D INCH 4.5276 4.9213 5.5118 6.2992 7.4803 4.7244 5.1181 5.7087 6.6929 7.8740 4.9213 5.5118 5.9055 7.0866 5.1181 5.7087 6.2992 7.4803 5.5118 5.9055 6.6929 7.8740 5.9055 6.4961 7.0866 8.4646 6.4961 7.0866 7.8740 9.0551 mm 13 18 24 30 43 13 18 24 32 45 13 20 24 34 13 20 26 36 16 20 28 38 16 22 28 40 18 24 33 40

WIDTH B INCH .5118 .7087 .9449 1.1811 1.6929 .5118 .7087 .9449 1.2598 1.7717 .5118 .7874 .9449 1.3386 .5118 .7874 1.0236 1.4173 .6299 .7874 1.1024 1.4961 .6299 .8661 1.1024 1.5748 .7087 .9449 1.2992 1.5748



BALL COMPLEMENT NO. 25 17 13 10 8 26 18 13 10 8 27 17 14 10 28 17 13 10 25 18 13 10 27 17 14 10 25 17 13 10 SIZE INCH 9/32 7/16 5/8 7/8 1-3/16 9/32 7/16 5/8 15/16 1-1/4 9/32 1/2 5/8 1 9/32 1/2 11/16 1-1/16 11/32 1/2 3/4 1-1/8 11/32 9/16 3/4 1-1/8 13/32 5/8 7/8 1-3/16



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18

HiTech Division


Lo

Li

d

D

BASIC P/N mm R-1828 R-1928 R-128 R-228 R-1830 R-1930 R-130 R-1832 R-1932 R-132 R-1834 R-1934 R-134 R-1836 R-1936 R-136 R-1838 R-1938 R-138 R-1840 R-1940 140 140 140 140 150 150 150 160 160 160 170 170 170 180 180 180 190 190 190 200 200

BORE d INCH 5.5118 5.5118 5.5118 5.5118 5.9055 5.9055 5.9055 6.2992 6.2992 6.2992 6.6929 6.6929 6.6929 7.0866 7.0866 7.0866 7.4803 7.4803 7.4803 7.8740 7.8740 mm 175 190 210 250 190 210 225 200 220 240 215 230 260 225 250 280 240 260 290 250 280

O.D. D INCH 6.8898 7.4803 8.2677 9.8425 7.4803 8.2677 8.8583 7.8740 8.6614 9.4488 8.4646 9.0551 10.2360 8.8583 9.8425 11.0240 9.4488 10.2360 11.4173 9.8425 11.0240 mm 18 24 33 42 20 28 35 20 28 38 22 28 42 22 33 46 24 33 46 24 38

WIDTH B INCH .7087 .9449 1.2992 1.6535 .7874 1.1024 1.3780 .7874 1.1024 1.4961 .8661 1.1024 1.6535 .8661 1.2992 1.8110 .9449 1.2992 1.8110 .9449 1.4961

LAND DIAMETER (REFERENCE) Lo Li INCH INCH 5.956 5.923 6.363 6.887 6.430 6.635 6.855 6.823 7.029 7.272 7.278 7.423 7.788 7.672 7.938 8.378 8.126 8.332 8.734 8.520 8.847 6.445 6.675 7.416 8.467 6.956 7.538 7.908 7.350 7.932 8.476 7.880 8.325 9.141 8.273 8.991 9.732 8.803 9.385 10.163 9.197 10.050


BALL COMPLEMENT NO. 26 18 14 10 26 16 15 28 17 14 26 18 13 28 17 14 26 17 14 27 16 SIZE INCH 13/32 5/8 7/8 1-5/16 7/16 3/4 7/8 7/16 3/4 1 1/2 3/4 1-1/8 1/2 7/8 1-1/8 9/16 7/8 1-3/16 9/16 1

LOAD RATINGS LBS DYN. C 8500 16000 26000 44600 9700 20900 26900 10000 21500 33100 12400 22000 39200 12800 28700 40800 15400 28300 45500 15600 35200 STATIC Co 9800 16500 24300 36600 11400 21000 36400 12200 22500 31800 14900 24000 37000 16000 30500 40400 18900 30700 44400 19500 37400


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19

HiTech Division

Ball BearingsMetric Series Angular ContactBore sizes 10-25 mmrB

Lo

Li

d

D

MDR

GR split inner

GR split outer

MER

BASIC P/N mm MER-1900 MER-100 MER-200 MER-300 MER-1901 MER-101 MER-201 MER-301 MER-1902 MER-102 MER-202 MER-302 MER-1903 MER-103 MER-203 MER-303 MER-1804 MER-1904 MER-104 MER-204 MER-304 MER-1805 MER-1905 MER-105 MER-205 MER-305 10 10 10 10 12 12 12 12 15 15 15 15 17 17 17 17 20 20 20 20 20 25 25 25 25 25

BORE d INCH .3937 .3937 .3937 .3937 .4724 .4724 .4724 .4724 .5906 .5906 .5906 .5906 .6693 .6693 .6693 .6693 .7874 .7874 .7874 .7874 .7874 .9843 .9843 .9843 .9843 .9843 mm 22 26 30 35 24 28 32 37 28 32 35 42 30 35 40 47 32 37 42 47 52 37 42 47 52 62

O.D. D INCH .8661 1.0236 1.1811 1.3780 .9449 1.1024 1.2598 1.4567 1.1024 1.2598 1.3780 1.6535 1.1811 1.3780 1.5748 1.8504 1.2598 1.4567 1.6535 1.8504 2.0472 1.4567 1.6535 1.8504 2.0472 2.4409 mm 6 8 9 11 6 8 10 12 7 9 11 13 7 10 12 14 7 9 12 14 15 7 9 12 15 17

WIDTH B INCH .2362 .3150 .3543 .4331 .2362 .3150 .3937 .4724 .2756 .3543 .4331 .5118 .2756 .3937 .4724 .5512 .2756 .3543 .4724 .5512 .5906 .2756 .3543 .4724 .5906 .6693

LAND DIAMETER (REFERENCE) Lo Li INCH INCH .570 .583 .656 .717 .629 .670 .725 .777 .735 .816 .815 .934 .832 .895 .952 1.034 .948 1.002 1.075 1.131 1.192 1.145 1.195 1.267 1.328 1.450 .734 .837 .919 1.055 .800 .924 1.007 1.153 .972 1.042 1.153 1.310 1.015 1.153 1.292 1.485 1.098 1.267 1.395 1.506 1.643 1.295 1.460 1.567 1.703 1.976


BALL COMPLEMENT NO. 11 9 9 8 11 10 9 7 12 11 10 9 13 13 10 8 17 11 11 10 9 20 14 13 11 9 SIZE INCH 1/8 3/16 7/32 9/32 9/64 3/16 15/64 5/16 5/32 3/16 1/4 5/16 5/32 3/16 17/64 3/8 1/8 7/32 1/4 5/16 3/8 1/8 7/32 1/4 5/16 15/32


Notes:1. Metric series angular contact ball bearings are typically manufactured from 52100 chrome steel to ABEC 3, 5 and 7 tolerances per ABMA standard 20. 2. standard contact angles are 15 and 25. other options are available. 3. Part numbers listed are with nonseparable, outer ring relieved configuration. other design options are available. 4. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear.

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20

HiTech Division


Lo

Li

d

D

MDR

GR split inner

GR split outer

MER

BASIC P/N mm MER-1806 MER-1906 MER-106 MER-206 MER-306 MER-1807 MER-1907 MER-107 MER-207 MER-307 MER-1808 MER-1908 MER-108 MER-208 MER-308 MER-1809 MER-1909 MER-109 MER-209 MER-309 MER-1810 MER-1910 MER-110 MER-210 MER-310 MER-1811 MER-1911 MER-111 MER-211 MER-311 30 30 30 30 30 35 35 35 35 35 40 40 40 40 40 45 45 45 45 45 50 50 50 50 50 55 55 55 55 55

BORE d INCH 1.1811 1.1811 1.1811 1.1811 1.1811 1.3780 1.3780 1.3780 1.3780 1.3780 1.5748 1.5748 1.5748 1.5748 1.5748 1.7717 1.7717 1.7717 1.7717 1.7717 1.9685 1.9685 1.9685 1.9685 1.9685 2.1654 2.1654 2.1654 2.1654 2.1654 mm 42 47 55 62 72 47 55 62 72 80 52 62 68 80 90 58 68 75 85 100 65 72 80 90 110 72 80 90 100 120

O.D. D INCH 1.6535 1.8504 2.1654 2.4409 2.8346 1.8504 2.1654 2.4409 2.8346 3.1496 2.0472 2.4409 2.6772 3.1496 3.5433 2.2835 2.6772 2.9528 3.3465 3.9370 2.5591 2.8346 3.1496 3.5433 4.3307 2.8346 3.1496 3.5433 3.9370 4.7244 mm 7 9 13 16 19 7 10 14 17 21 7 12 15 18 23 7 12 16 19 25 7 12 16 20 27 9 13 18 21 29

WIDTH B INCH .2756 .3543 .5118 .6299 .7480 .2756 .3937 .5512 .6693 .8268 .2756 .4724 .5906 .7087 .9055 .2756 .4724 .6299 .7480 .9843 .2756 .4724 .6299 .7874 1.0630 .3543 .5118 .7087 .8268 1.1417






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21

HiTech Division


Lo

Li

d

D

MDR

GR split inner

GR split outer

MER


BORE d INCH 2.3622 2.3622 2.3622 2.3622 2.3622 2.5591 2.5591 2.5591 2.5591 2.5591 2.7559 2.7559 2.7559 2.7559 2.7559 2.9528 2.9528 2.9528 2.9528 2.9528 3.1496 3.1496 3.1496 3.1496 3.1496 3.3465 3.3465 3.3465 3.3465 3.3465 mm 78 85 95 110 130 85 90 100 120 140 90 100 110 125 150 95 105 115 130 160 100 110 125 140 170 110 120 130 150 180

O.D. D INCH 3.0709 3.3465 3.7402 4.3307 5.1181 3.3465 3.5433 3.9370 4.7244 5.5118 3.5433 3.9370 4.3307 4.9213 5.9055 3.7402 4.1339 4.5276 5.1181 6.2992 3.9370 4.3307 4.9213 5.5118 6.6929 4.3307 4.7244 5.1181 5.9055 7.0866 mm 10 13 18 22 31 10 13 18 23 33 10 16 20 24 35 10 16 20 25 37 10 16 22 26 39 13 18 22 28 41

WIDTH B INCH .3937 .5118 .7087 .8661 1.2205 .3937 .5118 .7087 .9055 1.2992 .3937 .6299 .7874 .9449 1.3780 .3937 .6299 .7874 .9843 1.4567 .3937 .6299 .8661 1.0236 1.5354 .5118 .7087 .8661 1.1024 1.6142



BALL COMPLEMENT NO. 28 21 18 14 11 29 23 19 14 12 31 21 18 15 12 33 26 20 16 12 35 27 19 16 12 30 25 20 15 13 SIZE INCH 7/32 5/16 7/16 5/8 7/8 7/32 5/16 7/16 11/16 15/16 7/32 11/32 1/2 11/16 1 7/32 3/8 1/2 11/16 1-1/16 7/32 3/8 9/16 3/4 1-1/8 9/32 7/16 9/16 13/16 1-1/8



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22

HiTech Division


Lo

Li

d

D

MDR

GR split inner

GR split outer

MER


BORE d INCH 3.5433 3.5433 3.5433 3.5433 3.5433 3.7402 3.7402 3.7402 3.7402 3.7402 3.9370 3.9370 3.9370 3.9370 4.1339 4.1339 4.1339 4.1339 4.3307 4.3307 4.3307 4.3307 4.7244 4.7244 4.7244 4.7244 5.1181 5.1181 5.1181 5.1181 mm 115 125 140 160 190 120 130 145 170 200 125 140 150 180 130 145 160 190 140 150 170 200 150 165 180 215 165 180 200 230

O.D. D INCH 4.5276 4.9213 5.5118 6.2992 7.4803 4.7244 5.1181 5.7087 6.6929 7.8740 4.9213 5.5118 5.9055 7.0866 5.1181 5.7087 6.2992 7.4803 5.5118 5.9055 6.6929 7.8740 5.9055 6.4961 7.0866 8.4646 6.4961 7.0866 7.8740 9.0551 mm 13 18 24 30 43 13 18 24 32 45 13 20 24 34 13 20 26 36 16 20 28 38 16 22 28 40 18 24 33 40

WIDTH B INCH .5118 .7087 .9449 1.1811 1.6929 .5118 .7087 .9449 1.2598 1.7717 .5118 .7874 .9449 1.3386 .5118 .7874 1.0236 1.4173 .6299 .7874 1.1024 1.4961 .6299 .8661 1.1024 1.5748 .7087 .9449 1.2992 1.5748



BALL COMPLEMENT NO. 31 26 20 15 13 32 28 21 15 13 34 26 21 15 36 27 21 15 32 28 20 15 35 27 22 16 32 27 20 17 SIZE INCH 9/32 7/16 5/8 7/8 1-3/16 9/32 7/16 5/8 15/16 1-1/4 9/32 1/2 5/8 1 9/32 1/2 11/16 1-1/16 11/32 1/2 3/4 1-1/8 11/32 9/16 3/4 1-1/8 13/32 5/8 7/8 1-3/16



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23

HiTech Division


Lo

Li

d

D

MDR

GR split inner

GR split outer

MER

BASIC P/N mm MER-1828 MER-1928 MER-128 MER-228 MER-1830 MER-1930 MER-130 MER-1832 MER-1932 MER-132 MER-1834 MER-1934 MER-134 MER-1836 MER-1936 MER-136 MER-1838 MER-1938 MER-138 MER-1840 MER-1940 140 140 140 140 150 150 150 160 160 160 170 170 170 180 180 180 190 190 190 200 200

BORE d INCH 5.5118 5.5118 5.5118 5.5118 5.9055 5.9055 5.9055 6.2992 6.2992 6.2992 6.6929 6.6929 6.6929 7.0866 7.0866 7.0866 7.4803 7.4803 7.4803 7.8740 7.8740 mm 175 190 210 250 190 210 225 200 220 240 215 230 260 225 250 280 240 260 290 250 280

O.D. D INCH 6.8898 7.4803 8.2677 9.8425 7.4803 8.2677 8.8583 7.8740 8.6614 9.4488 8.4646 9.0551 10.2360 8.8583 9.8425 11.0240 9.4488 10.2360 11.4173 9.8425 11.0240 mm 18 24 33 42 20 28 35 20 28 38 22 28 42 22 33 46 24 33 46 24 38

WIDTH B INCH .7087 .9449 1.2992 1.6535 .7874 1.1024 1.3780 .7874 1.1024 1.4961 .8661 1.1024 1.6535 .8661 1.2992 1.8110 .9449 1.2992 1.8110 .9449 1.4961

LAND DIAMETER (REFERENCE) Lo Li INCH INCH 5.956 5.923 6.363 6.887 6.429 6.635 6.855 6.823 7.029 7.272 7.277 7.422 7.787 7.671 7.938 8.378 8.126 8.331 8.734 8.519 8.847 6.445 6.675 7.416 8.466 6.956 7.537 7.908 7.349 7.931 8.475 7.879 8.325 9.141 8.273 8.991 9.732 8.803 9.384 10.163 9.196 10.050


BALL COMPLEMENT NO. 35 29 22 16 35 26 23 37 27 22 35 29 21 37 27 22 36 28 22 37 26 SIZE INCH 13/32 5/8 7/8 1-5/16 7/16 3/4 7/8 7/16 3/4 1 1/2 3/4 1-1/8 1/2 7/8 1-1/8 9/16 7/8 1-3/16 9/16 1

LOAD RATINGS LBS DYN. C 10300 22000 35100 61000 11800 28900 35800 12100 29300 44700 15100 30300 54000 15500 39000 55100 19100 39500 60800 19200 48600 STATIC Co 13200 26700 38100 58500 15300 34200 40400 16100 35800 49900 20000 38700 59800 21100 48500 63500 26200 50600 70600 26800 60800


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24

HiTech Division

Ball BearingsInch Series RadialBore sizes .5000-1.5000 inchesrB

Lo

Li

d

D

Shielded

Open

BASIC P/N INCH RI-1812 RI-2258 RI-2634 RI-3078 RI-3216 RI-3418 RI-3620 RI-4224

BORE d mm 12.700 15.875 19.050 22.225 25.400 28.575 31.750 38.100 INCH 1.1250 1.3750 1.6250 1.8750 2.0000 2.1250 2.2500 2.6250

O.D. D mm 28.575 34.925 41.275 47.625 50.800 53.975 57.150 66.675 INCH .2500 .2812 .3125 .3750 .3750 .3750 .3750 .4375

WIDTH B OPEN mm 6.350 7.142 7.938 9.525 9.525 9.525 9.525 11.112 SHIELDED INCH mm .3125 .3438 .4375 .5000 .5000 .5000 .5000 .5625 7.938 8.732 11.112 12.700 12.700 12.700 12.700 14.288

LAND DIAMETER (REFERENCE) Li Lo INCH INCH .701 .852 1.020 1.266 1.327 1.503 1.503 1.856 .913 1.132 1.344 1.567 1.703 1.842 1.842 2.269

FILLET RADIUS r INCH .016 .031 .031 .031 .031 .031 .031 .031

BALL COMPLEMENT NO. 9 8 8 10 9 11 11 11 SIZE INCH 5/32 7/32 1/4 1/4 5/16 9/32 9/32 11/32

LOAD RATINGS (LBS) RADIAL CAPACITY THRUST DYN. STATIC CAPACITY C Co STATIC 861 1518 1886 2255 3145 2966 2966 4258 434 747 951 1316 1763 1857 1857 2786 290 617 663 960 1396 1467 1414 2238

.5000 .6250 .7500 .8750 1.0000 1.1250 1.2500 1.5000

Notes:1. Inch series radial ball bearings are typically manufactured from 440C stainless steel. 2. Load ratings shown are for 52100 chrome steel. 3. For part numbers -2258 and -2634, ABEC 3P, 5P and 7P per ABMA standard 12 apply. For all others, ABEC 3, 5 and 7 per ABMA standard 20 apply. 4. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear.

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25

HiTech Division

Ball BearingsInch Series Torque Tube RadialBore sizes .6250-3.0625 inchesrB

Lo

Li

d

DDETAIL

Bi

BASIC P/N INCH RI-538 RI-539 RI-540 RI-541 RI-542 RI-543 RI-544 RI-545 RI-546 RI-547 RI-548 RI-549

BORE d mm 15.875 19.050 22.225 26.988 33.338 39.688 46.038 52.388 58.738 65.088 71.438 77.788 INCH

O.D. D mm 26.988 30.162 33.338 38.100 44.450 50.800 57.150 66.675 73.025 82.550 88.900 98.425

WIDTH B INNER Bi INCH mm .2812 .2812 .2812 .2812 .2812 .2812 .2812 .2812 .2812 .3750 .3750 .3750 7.142 7.142 7.142 7.142 7.142 7.142 7.142 7.142 7.142 9.525 9.525 9.525 OUTER B INCH mm .2500 .2500 .2500 .2500 .2500 .2500 .2500 .2500 .2500 .3120 .3120 .3120 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 7.925 7.925 7.925

LAND DIAMETER (REFERENCE) Li Lo INCH INCH .773 .894 1.019 1.210 1.460 1.706 1.963 2.263 2.513 2.793 3.043 3.352 .933 1.054 1.179 1.368 1.618 1.866 2.123 2.423 2.674 3.024 3.275 3.589

FILLET RADIUS r INCH .015 .015 .015 .015 .015 .015 .015 .015 .015 .015 .015 .015

BALL COMPLEMENT NO. 12 12 14 16 18 25 29 32 34 26 28 32 SIZE INCH 1/8 1/8 1/8 1/8 1/8 1/8 1/8 1/8 1/8 3/16 3/16 3/16

LOAD RATINGS (LBS) RADIAL CAPACITY THRUST DYN. STATIC CAPACITY C Co STATIC 655 645 705 754 780 935 998 1028 1044 1954 2011 2147 379 391 467 548 632 893 1050 1172 1255 2113 2293 2652 271 272 318 365 411 573 665 735 794 1778 1818 2031

.6250 .7500 .8750 1.0625 1.3125 1.5625 1.8125 2.0625 2.3125 2.5625 2.8125 3.0625

1.0625 1.1875 1.3125 1.5000 1.7500 2.0000 2.2500 2.6250 2.8750 3.2500 3.5000 3.8750

Notes:1. Torque tube radial ball bearings are typically manufactured from 440C stainless steel. 2. Load ratings shown are for 52100 chrome steel. 3. The standard retainer design is a phenolic crown. Please check with nHBB for availability of other retainer options. 4. standard tolerances are ABEC 5T per ABMA standard 12. ABEC 7T tolerances are also available. 5. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear.

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26

HiTech Division

Ball BearingsInch Series Torque Tube Angular ContactBore sizes .6250-3.0625 inchesrB

Lo

Li

d

DDETAIL

MERBi

BASIC P/N INCH MERI-538 MERI-539 MERI-540 MERI-541 MERI-542 MERI-543 MERI-544 MERI-545 MERI-546 MERI-547 MERI-548 MERI-549

BORE d mm 15.875 19.050 22.225 26.988 33.338 39.688 46.038 52.388 58.738 65.088 71.438 77.788 INCH

O.D. D mm 26.988 30.162 33.338 38.100 44.450 50.800 57.150 66.675 73.025 82.550 88.900 98.425

WIDTH B INNER Bi INCH mm .2812 .2812 .2812 .2812 .2812 .2812 .2812 .2812 .2812 .3750 .3750 .3750 7.142 7.142 7.142 7.142 7.142 7.142 7.142 7.142 7.142 9.525 9.525 9.525 OUTER B INCH mm .2500 .2500 .2500 .2500 .2500 .2500 .2500 .2500 .2500 .3120 .3120 .3120 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 6.350 7.925 7.925 7.925

LAND DIAMETER (REFERENCE) Li Lo INCH INCH .773 .894 1.019 1.210 1.460 1.706 1.960 2.263 2.513 2.793 3.043 3.356 .933 1.054 1.179 1.370 1.620 1.866 2.120 2.423 2.674 3.019 3.269 3.582

FILLET RADIUS r INCH .015 .015 .015 .015 .015 .015 .015 .015 .015 .015 .015 .015

BALL COMPLEMENT NO. 16 18 20 24 28 34 38 44 48 36 39 42 SIZE INCH 1/8 1/8 1/8 1/8 1/8 1/8 1/8 1/8 1/8 3/16 3/16 3/16

LOAD RATINGS (LBS) RADIAL CAPACITY THRUST DYN. STATIC CAPACITY C Co STATIC 793 845 894 988 1047 1147 1196 1272 1314 2428 2508 2573 506 587 668 822 983 1215 1375 1612 1772 2926 3194 3467 362 408 455 549 640 779 872 1011 1117 2462 2533 2666

.6250 .7500 .8750 1.0625 1.3125 1.5625 1.8125 2.0625 2.3125 2.5625 2.8125 3.0625

1.0625 1.1875 1.3125 1.5000 1.7500 2.0000 2.2500 2.6250 2.8750 3.2500 3.5000 3.8750

Notes:1. Torque tube angular contact ball bearings are typically manufactured from 440C stainless steel. 2. Load ratings shown are for 52100 chrome steel. 3. Part numbers listed are with outer ring relieved configuration. other design options are available. 4. The standard retainer is a one-piece phenolic. Please check with nHBB for availability of other retainer options. 5. standard tolerances are ABEC 5T per ABMA standard 12. ABEC 7T tolerances are also available. 6. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear.

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27

HiTech Division

Ball BearingsInch Series Thin Section Radial and Gothic ArchBore sizes .8750-4.2500 inchesrB

Lo

Li

d

D DETAIL

Gothic Arch split inner

Gothic Arch split outer

Radial

REF. 1/8 1/8 1/8 1/8 1/8 1/8 1/4 5/16 1/4 5/16 1/4 5/16 3/8 1/4 5/16 3/8 1/4 5/16 3/8 1/4 5/16 3/8 1/4 5/16 3/8 1/2 1/4 5/16 3/8 1/2

BASIC P/N RI-1878 RI-2117 RI-2420 RI-2622 RI-2824 RI-3026 RI-4032 RI-4232 RI-4840 RI-5040 RI-5648 RI-5848 RI-6048 RI-6052 RI-6252 RI-6452 RI-6456 RI-6656 RI-6856 RI-6860 RI-7060 RI-7260 RI-7264 RI-7464 RI-7664 RI-8064 RI-7668 RI-7868 RI-8068 RI-8468

BORE d INCH .8750 1.0625 1.2500 1.3750 1.5000 1.6250 2.0000 2.0000 2.5000 2.5000 3.0000 3.0000 3.0000 3.2500 3.2500 3.2500 3.5000 3.5000 3.5000 3.7500 3.7500 3.7500 4.0000 4.0000 4.0000 4.0000 4.2500 4.2500 4.2500 4.2500

O.D. D INCH 1.1250 1.3125 1.5000 1.6250 1.7500 1.8750 2.5000 2.6250 3.0000 3.1250 3.5000 3.6250 3.7500 3.7500 3.8750 4.0000 4.0000 4.1250 4.2500 4.2500 4.3750 4.5000 4.5000 4.6250 4.7500 5.0000 4.7500 4.8750 5.0000 5.2500

WIDTH B INCH .1562 .1562 .1562 .1562 .1562 .1562 .2500 .3125 .2500 .3125 .2500 .3125 .3750 .2500 .3125 .3750 .2500 .3125 .3750 .2500 .3125 .3750 .2500 .3125 .3750 .5000 .2500 .3125 .3750 .5000

LAND DIAMETER (REFERENCE) Lo Li INCH .961 1.144 1.320 1.457 1.584 1.709 2.325 2.375 2.674 2.731 3.174 3.234 3.281 3.437 3.484 3.535 3.688 3.730 3.718 3.937 3.984 4.031 4.187 4.234 4.281 4.375 4.437 4.484 4.531 4.625 INCH 1.049 1.231 1.402 1.543 1.666 1.793 2.174 2.406 2.825 2.893 3.326 3.391 3.469 3.567 3.641 3.723 3.811 3.894 3.907 4.063 4.141 4.219 4.313 4.391 4.469 4.625 4.563 4.641 4.719 4.875



LOAD RATINGS (LBS) RADIAL CAPACITY THRUST CAPACITY DYN. STATIC STATIC C Co 171 182 192 203 206 216 995 1132 1069 1125 1153 1245 1688 898 1197 1616 934 1262 1622 956 1284 1660 723 1324 1667 2514 987 1325 1936 2597 134 159 184 208 211 245 1096 1096 1334 1216 1610 1492 1917 1228 1485 1899 1342 1657 1968 1429 1747 2096 964 1877 2164 2920 1574 1925 2775 3142 226 267 309 350 371 412 951 2413 1074 2335 1237 3284 4098 2514 2853 3577 2747 3273 3799 2924 3449 4048 3200 3708 4227 5455 3324 3801 4477 5983

Notes:1. Inch series thin section ball bearings are typically manufactured from 440C stainless steel. 2. Load ratings shown are for 52100 chrome steel. 3. nHBB typically manufactures thin section bearings to ABEC 5T and 7T tolerances per AMBA standard 12 (bore diameters up to 1.6250 inches) and ABEC 5F and 7F tolerances per ABMA standard 26 (bore diameters above 1.6250 inches). 4. For gothic arch configuration, add a G prefix. 5. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear. 6. Gothic arch bearings (4-point ball-to-race contact) provide for reduced internal free play in axial and radial directions. 7. Radial bearings accept moderate radial and thrust loads at lower speeds. open width shown; shielded width is .1960 inches.

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HiTech Division

Ball BearingsInch Series Thin Section Radial and Gothic ArchBore sizes 4.5000-10.0000 inchesrB

Lo

Li

d

D DETAIL

Gothic Arch split inner

Gothic Arch split outer

Radial

REF. 1/4 5/16 3/8 1/2 1/4 5/16 3/8 1/2 1/4 5/16 3/8 1/2 5/16 3/8 1/2 5/16 3/8 1/2 5/16 3/8 1/2 3/8 1/2 3/8 1/2 3/8 1/2 1/2 1/2 1/2 1/2

BASIC P/N RI-8072 RI-8272 RI-8472 RI-8872 RI-8476 RI-8676 RI-8876 RI-9276 RI-8880 RI-9080 RI-9280 RI-9680 RI-9888 RI-10088 RI-10488 RI-10696 RI-10896 RI-11296 RI-114104 RI-116104 RI-120104 RI-124112 RI-128112 RI-132120 RI-136120 RI-140128 RI-144128 RI-152136 RI-160144 RI-168152 RI-176160

BORE d INCH 4.5000 4.5000 4.5000 4.5000 4.7500 4.7500 4.7500 4.7500 5.0000 5.0000 5.0000 5.0000 5.5000 5.5000 5.5000 6.0000 6.0000 6.0000 6.5000 6.5000 6.5000 7.0000 7.0000 7.5000 7.5000 8.0000 8.0000 8.5000 9.0000 9.5000 10.0000

O.D. D INCH 5.0000 5.1250 5.2500 5.5000 5.2500 5.3750 5.5000 5.7500 5.5000 5.6250 5.7500 6.0000 6.1250 6.2500 6.5000 6.6250 6.7500 7.0000 7.1250 7.2500 7.5000 7.7500 8.0000 8.2500 8.5000 8.7500 9.0000 9.5000 10.0000 10.5000 11.0000

WIDTH B INCH .2500 .3125 .3750 .5000 .2500 .3125 .3750 .5000 .2500 .3125 .3750 .5000 .3125 .3750 .5000 .3125 .3750 .5000 .3125 .3750 .5000 .3750 .5000 .3750 .5000 .3750 .5000 .5000 .5000 .5000 .5000

LAND DIAMETER (REFERENCE) Lo Li INCH 4.687 4.734 4.781 4.875 4.937 4.984 5.031 5.125 5.197 5.234 5.281 5.375 5.734 5.781 5.875 6.234 6.281 6.375 6.734 6.781 6.875 7.281 7.375 7.781 7.875 8.281 8.375 8.875 9.375 9.875 10.375 INCH 4.813 4.891 4.969 5.125 5.063 5.141 5.219 5.375 5.319 5.391 5.469 5.625 5.891 5.969 6.125 6.391 6.469 6.625 6.891 6.969 7.125 7.469 7.625 7.969 8.125 8.469 8.625 9.125 9.469 10.125 10.625

FILLET RADIUS r INCH .025 .040 .040 .060 .025 .040 .040 .060 .025 .040 .040 .060 .040 .040 .060 .040 .040 .060 .040 .040 .060 .040 .060 .040 .060 .040 .060 .060 .060 .060 .060

BALL COMPLEMENT NO. 60 48 40 32 64 51 43 33 66 55 46 35 58 49 37 63 53 41 68 55 44 59 47 63 50 67 53 56 60 63 66 SIZE INCH 1/8 5/32 3/16 1/4 1/8 5/32 3/16 1/4 1/8 5/32 3/16 1/4 5/32 3/16 1/4 5/32 3/16 1/4 5/32 3/16 1/4 3/16 1/4 3/16 1/4 3/16 1/4 1/4 1/4 1/4 1/4

LOAD RATINGS (LBS) RADIAL CAPACITY THRUST CAPACITY DYN. STATIC STATIC C Co 1008 1345 1740 2676 1035 1382 1797 2702 1047 1436 1864 2774 1459 1901 2816 1510 1962 2955 1559 1973 3041 2032 3123 2105 3202 2147 3278 3352 3463 3531 3598 1660 2014 2421 3365 1774 2145 2597 3489 1833 2318 2798 3705 2462 2994 3939 2682 3250 7386 2903 3383 4725 3639 5065 3890 5405 4151 5745 6084 6533 6873 7212 3506 4080 4836 6408 3857 4346 5213 6632 3870 4696 5591 7058 4971 5982 7505 5416 6494 8357 5891 6760 9006 7272 9655 7783 10303 8295 10952 11600 12456 13105 13754

Notes:1. Inch series thin section ball bearings are typically manufactured from 440C stainless steel. 2. Load ratings shown are for 52100 chrome steel. 3. nHBB typically manufactures thin section bearings to ABEC 5T and 7T tolerances per AMBA standard 12 (bore diameters up to 1.6250 inches) and ABEC 5F and 7F tolerances per ABMA standard 26 (bore diameters above 1.6250 inches). 4. For gothic arch configuration, add a G prefix. 5. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear. 6. Gothic arch bearings (4-point ball-to-race contact) provide for reduced internal free play in axial and radial directions. 7. Radial bearings accept moderate radial and thrust loads at lower speeds.

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29

HiTech Division

Ball BearingsInch Series Thin Section Angular ContactBore sizes .8750-4.2500rB

Lo

Li

d

D DETAIL

MDR

MER

REF. 1/8 1/8 1/8 1/8 1/8 1/8 1/4 5/16 1/4 5/16 1/4 5/16 3/8 1/4 5/16 3/8 1/4 5/16 3/8 1/4 5/16 3/8 1/4 5/16 3/8 1/2 1/4 5/16 3/8 1/2

BASIC P/N MERI-1878 MERI-2117 MERI-2420 MERI-2622 MERI-2824 MERI-3026 MERI-4032 MERI-4232 MERI-4840 MERI-5040 MERI-5648 MERI-5848 MERI-6048 MERI-6052 MERI-6252 MERI-6452 MERI-6456 MERI-6656 MERI-6856 MERI-6860 MERI-7060 MERI-7260 MERI-7264 MERI-7464 MERI-7664 MERI-8064 MERI-7668 MERI-7868 MERI-8068 MERI-8468

BORE d INCH .8750 1.0625 1.2500 1.3750 1.5000 1.6250 2.0000 2.0000 2.5000 2.5000 3.0000 3.0000 3.0000 3.2500 3.2500 3.2500 3.5000 3.5000 3.5000 3.7500 3.7500 3.7500 4.0000 4.0000 4.0000 4.0000 4.2500 4.2500 4.2500 4.2500

O.D. D INCH 1.1250 1.3125 1.5000 1.6250 1.7500 1.8750 2.5000 2.6250 3.0000 3.1250 3.5000 3.6250 3.7500 3.7500 3.8750 4.0000 4.0000 4.1250 4.2500 4.2500 4.3750 4.5000 4.5000 4.6250 4.7500 5.0000 4.7500 4.8750 5.0000 5.2500

WIDTH B INCH .1562 .1562 .1562 .1562 .1562 .1562 .2500 .3125 .2500 .3125 .2500 .3125 .3750 .2500 .3125 .3750 .2500 .3125 .3750 .2500 .3125 .3750 .2500 .3125 .3750 .5000 .2500 .3125 .3750 .5000

LAND DIAMETER (REFERENCE) Lo Li INCH .961 1.144 1.320 1.457 1.584 1.709 2.325 2.375 2.674 2.731 3.174 3.234 3.281 3.437 3.484 3.535 3.688 3.730 3.718 3.937 3.984 4.031 4.187 4.234 4.281 4.375 4.437 4.484 4.531 4.625 INCH 1.049 1.231 1.402 1.543 1.666 1.793 2.174 2.406 2.825 2.893 3.326 3.391 3.469 3.567 3.641 3.723 3.811 3.894 3.907 4.063 4.141 4.219 4.313 4.391 4.469 4.625 4.563 4.641 4.719 4.875



LOAD RATINGS (LBS) RADIAL CAPACITY THRUST CAPACITY DYN. STATIC STATIC C Co 208 223 237 249 257 265 1124 1307 1222 1425 1309 1394 1812 1039 1450 1875 1069 1484 1935 1098 1518 1992 1126 1568 2047 2973 1153 1599 2110 3040 179 216 253 283 308 332 1315 1359 1631 1696 1947 1806 2183 1529 1980 2374 1644 2113 2564 1758 2246 2755 1873 2420 2946 3754 1988 2552 3137 3980 325 363 425 476 517 557 1141 2992 1313 3735 1496 3470 4158 3128 3725 4522 3364 4173 5006 3713 4435 5380 3956 4779 5753 7014 4198 5041 6127 7579

Notes:1. Angular contact thin section ball bearings are typically manufactured from 440C stainless steel. 2. Load ratings shown are for 52100 chrome steel. 3. nHBB typically manufactures thin section bearings to ABEC 5T and 7T tolerances per AMBA standard 12 (bore diameters up to 1.6250 inches) and ABEC 5F and 7F tolerances per ABMA standard 26 (bore diameters above 1.6250 inches). 4. Part numbers listed are with outer ring relieved configuration. other design options are available. 5. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear. open width shown; shielded width is .1960 inches.

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30

HiTech Division

Ball BearingsInch Series Thin Section Angular ContactBore sizes 4.5000-10.0000 inchesrB

Lo

Li

d

D DETAIL

MDR

MER

REF. 1/4 5/16 3/8 1/2 1/4 5/16 3/8 1/2 1/4 5/16 3/8 1/2 5/16 3/8 1/2 5/16 3/8 1/2 5/16 3/8 1/2 3/8 1/2 3/8 1/2 3/8 1/2 1/2 1/2 1/2 1/2

BASIC P/N MERI-8072 MERI-8272 MERI-8472 MERI-8872 MERI-8476 MERI-8676 MERI-8876 MERI-9276 MERI-8880 MERI-9080 MERI-9280 MERI-9680 MERI-9888 MERI-10088 MERI-10488 MERI-10696 MERI-10896 MERI-11296 MERI-114104 MERI-116104 MERI-120104 MERI-124112 MERI-128112 MERI-132120 MERI-136120 MERI-140128 MERI-144128 MERI-152136 MERI-160144 MERI-168152 MERI-176160

BORE d INCH 4.5000 4.5000 4.5000 4.5000 4.7500 4.7500 4.7500 4.7500 5.0000 5.0000 5.0000 5.0000 5.5000 5.5000 5.5000 6.0000 6.0000 6.0000 6.5000 6.5000 6.5000 7.0000 7.0000 7.5000 7.5000 8.0000 8.0000 8.5000 9.0000 9.5000 10.0000

O.D. D INCH 5.0000 5.1250 5.2500 5.5000 5.2500 5.3750 5.5000 5.7500 5.5000 5.6250 5.7500 6.0000 6.1250 6.2500 6.5000 6.6250 6.7500 7.0000 7.1250 7.2500 7.5000 7.7500 8.0000 8.2500 8.5000 8.7500 9.0000 9.5000 10.0000 10.5000 11.0000

WIDTH B INCH .2500 .3125 .3750 .5000 .2500 .3125 .3750 .5000 .2500 .3125 .3750 .5000 .3125 .3750 .5000 .3125 .3750 .5000 .3125 .3750 .5000 .3750 .5000 .3750 .5000 .3750 .5000 .5000 .5000 .5000 .5000

LAND DIAMETER (REFERENCE) Lo Li INCH 4.687 4.734 4.781 4.875 4.937 4.984 5.031 5.125 5.197 5.234 5.281 5.375 5.734 5.781 5.875 6.234 6.281 6.375 6.734 6.781 6.875 7.281 7.375 7.781 7.875 8.281 8.375 8.875 9.375 9.875 10.375 INCH 4.813 4.891 4.969 5.125 5.063 5.141 5.219 5.375 5.319 5.391 5.469 5.625 5.891 5.969 6.125 6.391 6.469 6.625 6.891 6.969 7.125 7.469 7.625 7.969 8.125 8.469 8.625 9.125 9.469 10.125 10.625

FILLET RADIUS r INCH .025 .040 .040 .060 .025 .040 .040 .060 .025 .040 .040 .060 .040 .040 .060 .040 .040 .060 .040 .040 .060 .040 .060 .040 .060 .040 .060 .060 .060 .060 .060

BALL COMPLEMENT NO. 75 64 55 40 80 68 58 42 84 71 61 44 78 66 48 85 72 52 91 78 56 83 60 89 64 95 68 72 76 80 84 SIZE INCH 1/8 5/32 3/16 1/4 1/8 5/32 3/16 1/4 1/8 5/32 3/16 1/4 5/32 3/16 1/4 5/32 3/16 1/4 5/32 3/16 1/4 3/16 1/4 3/16 1/4 3/16 1/4 1/4 1/4 1/4 1/4

LOAD RATINGS (LBS) RADIAL CAPACITY THRUST CAPACITY DYN. STATIC STATIC C Co 1169 1629 2152 3106 1205 1674 2193 3169 1230 1703 2250 3231 1777 2318 3350 1844 2407 3463 1893 2491 3571 2551 3675 2650 3775 2703 3871 3964 4054 4141 4226 2075 2685 3328 4206 2218 2859 3503 4432 2333 2992 3711 4658 3311 4032 5110 3619 4415 5562 3885 4798 6014 5119 6466 5496 6918 5885 7371 7823 8275 8727 9179 4382 5186 7738 8010 4822 5453 7032 8441 5071 6063 7415 8873 6658 8058 9736 7307 8222 10599 7843 9588 11462 10230 12325 10996 13188 11761 14052 14915 15778 16641 17505

Notes:1. Angular contact thin section ball bearings are typically manufactured from 440C stainless steel. 2. Load ratings shown are for 52100 chrome steel. 3. nHBB typically manufactures thin section bearings to ABEC 5T and 7T tolerances per AMBA standard 12 (bore diameters up to 1.6250 inches) and ABEC 5F and 7F tolerances per ABMA standard 26 (bore diameters above 1.6250 inches). 4. Part numbers listed are with outer ring relieved configuration. other design options are available. 5. Fillet Radius (r) is the maximum shaft or housing fillet radius that bearing corners will clear.

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HiTech Division

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32

HiTech Division

special ProductsComplex Bearing Assemblies with Customized Features

NHBB manufactures a wide range of special bearings designed to meet specific requirements. If the challenge you face involves high load, extreme speed, limited space, simplified assembly, efficient distribution of lubrication, or any number of similar situations requiring custom design, were ready to help.

A sampling of our special design features include anti-rotation tabs to prevent ring rotation under load, oil scavenge holes to enable lubricant circulation and removal, and puller grooves to allow for simple disassembly. Read on to see what our experienced staff of applications engineers can design specifically for you.

Mainshaft Bearing Assemblies with Integral Flexure BeamsThese complex bearing assemblies incorporate flexure beams to control vibration at high speeds.

Cylindrical Roller Bearing Gas Turbine MainshaftThis unique bearing features an innovative extended inner ring to direct the flow and enhance the distribution of spent lubricant during the scavenge process.

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HiTech Division

special ProductsComplex Bearing Assemblies with Customized Features Cylindrical Roller Bearing Gas Turbine MainshaftA series of integral anti-rotation tabs prevent the ring on this bearing from rotating under load. The piston ring grooves machined into the outer ring accommodate fluid-damped mounting to further reduce vibration.

Super Duplex Ball Bearing Main Fuel PumpA locator flange on the outer ring ensures precise positioning and ease of installation. This bearing is supplied as a matched set for high moment resistance.

Cylindrical Roller Bearing Aircraft Engine Hydraulic PumpThis unique design features an extended inner ring to allow offset mounting under tight space constraints.

Cylindrical Roller Bearing Gas Turbine Engine Accessory GearboxThe integral flange of this bearing simplifies mounting while the oil holes on the inner ring ensure consistent lubrication.

Radial Ball Bearing Gas Turbine Engine Accessory GearboxThe integral flange and puller groove allow for ease of installation and simple disassembly.

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34

HiTech Division

special ProductsComplex Bearing Assemblies with Customized Features Super Duplex Ball Bearing Gas Turbine Power Take OffThe puller groove on this bearing simplifies disassembly while the oil scavenge holes enable spent lubricant to exit freely.

Matched Set of Six Ball Bearings Helicopter Blade RetentionThese bearings are designed to accommodate extremely high thrust loads and can be ordered in matched sets of two to eight.

Duplex Ball Bearing Main Fuel PumpThe integral mounting flange and full sleeve on this bearing provide ease of installation and fit.

Gothic Arch Ball BearingThe split inner ring of this bearing minimizes end play which reduces wear and extends the useful life of the application. The puller groove simplifies disassembly.

Full Complement Thin Section Ball Bearing Helicopter Rotor Swash PlateSpecified when bearing weight and size need to be kept to a minimum, this bearing has a thin cross section and a high quantity of small diameter balls which increase stiffness, reduce deflection, and lower starting and running torque.

Duplex Tandem Ball Bearing Helicopter Main GearboxThis bearing was designed specifically for high thrust capacity. A split inner ring minimizes end play, thereby reducing wear and extending the useful life of the gearbox.

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HiTech Division

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36

HiTech Division

EngineeringMaterialsThe most common materials used in rolling element bearings include 52100 chrome steel, 440C stainless steel and M50 tool steel. While these standard materials are suitable for most applications, extraordinary operating conditions often require the use of more advanced alloys such as BG42, M50 NiL and Cobalt-based alloys, which offer superb performance at high speeds, extreme temperatures, heavy loads and in corrosive conditions. Although cost considerations occasionally override longevity, the expense involved in more frequent bearing replacement often justifies the higher initial costs of specifying longer-lasting specialty metals. A detailed analysis of the factors involved in a specific application is required before selecting the correct material. The following table, while not a complete list of available alloys, is a helpful starting point to the selection process. Please contact NHBBs Applications Engineering department for help with making a final determination.

Ring Material PropertiesMATERIAL SPECIFICATION AMS 6440 52100 AMS 6444 CEVM MELT METHOD Vacuum degassed FEATURES AND ADvANTAGES Available in tube form Premium quality Very low impurity level HARDNESS AT ROOM TEMP. (HRC) 60-64 58-62 60-64 58-62 AMS 5880 Air melt or vacuum degassed Corrosion resistance 58-62 56-60 440C AMS 5618 CEVM Premium quality Low impurity level 58-62 56-60 M50 BG42 AMS 6491 AMS 5749 VIM/VAR VIM/VAR Premium quality High temperature capabilities Premium quality Corrosion resistance High temperature capabilities Extreme corrosion resistance Chemical resistance High temperature capabilities Carburized High temperature capabilities High cost 60-64 61-65 325 F 825 F 975 F 950 F Good wear properties Thermal stability with corrosion resistance Excellent fatigue properties High thermal stability Excellent wear properties High thermal stability Improved toughness Improved compressive strength Good thermal stability Low hardness reduction at elevated temperatures High fracture toughness of core Accommodates high hoop stresses and cyclic loading OPERATING TEMP. LIMIT 310 F 400 F 310 F 400 F 325 F 825 F HEAT TREATMENT ATTRIBUTES Good wear and fatigue properties Improved thermal stability Good wear and fatigue properties Improved thermal stability Good wear properties Thermal stability with corrosion resistance

Nitrogen enriched steel Cobalt-based alloys M50 NiL

AMS 5898 AMS 5759

P-ESR CEVM

60-64 50 (min.)

850 F 1000 F

AMS 6278

VIM/VAR

Case: 60 (min.)

975 F

HiTech purchases all products per AMs industry standards and/or nHBB product engineering standards. Consumable Electrode vacuum Melted. vacuum Induction Melted/vacuum Arc Remelted.

Pressure Electroslag Remelting. BG42 is a registered trademark of Latrobe specialty steel Company.

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HiTech Division

EngineeringMaterials Fatigue LifeBearing steels possess specific characteristics that play a critical role in bearing performance. Choosing a material with the correct values for hardness, corrosion resistance, strength, fracture toughness and fatigue life ensures that a bearing will function reliably within an applications operational and environmental parameters. During the material selection process, these characteristics are weighed against an applications specific conditions of temperature, load and corrosiveness. The most important result of material selection is a bearings longevity. Since different materials possess varying amounts of fatigue life, each alloy is assigned a life adjustment factor which is determined through empirical testing. This value provides a basis for calculating a dependable bearing-life estimate. The life adjustment factors for various bearing steels are listed on page 45.NHBBs vacuum carburizing furnace.

Materials ProcessingNHBB maintains exacting metallurgical control of all materials from the originating mill through all manufacturing processes. Materials are heat-treated and tempered in-house under controlled atmospheres to bring about the uniform grain structure and specific hardness appropriate for the intended application. Finished carburized alloys have a thin outer case, with hardness values comparable to M50, which provide the needed rolling contact fatigue properties. In contrast, the inner core of the carburized ring is relatively soft and ductile, with desirable fracture toughness properties that allow the bearing to tolerate high internal tensile stresses. These characteristics create a tougher bearing that is well suited for tight press fits or highly loaded flanges.

CarburizingHiTech continually investigates the latest in materials technology, alloying techniques and heat-treat methods in order to design and manufacture more complex bearing components for the aerospace market. One recent development is the capability to carburize and case harden M50 NiL and other special alloys. Continual development in gas turbine engine technology is leading to engines running at greater speeds and temperatures. These engines require bearings that are capable of enduring increased demands. When engines run at high speeds and elevated temperatures, the bearing rings increase in diameter because of centrifugal forces and thermal expansion. In order to keep the inner ring fixed to the shaft, a greater press fit at ambient temperatures is required. However, the tighter press fit of the inner ring causes high tensile stresses within the bearing. A typical through-hardened bearing material such as M50 would crack under these conditions. An excellent solution to this problem is the use of a carburized steel alloy. Carburizing is a heat-treat process where alloys with low carbon content are exposed to a carbon rich atmosphere at an elevated temperature. Carbon diffuses into the exposed surfaces of the ring. The ring is then heat-treated to the desired surface hardness while leaving the carbon-deficient core relatively soft.

Materials LaboratoryOur Materials Laboratory is specifically designed and equipped to perform complex chemical, metallurgical and visual analyses of the many component parts in ball and roller bearings. Alloy composition is determined with X-ray diffraction spectrography and nondestructive test methods. Metallurgical studies are conducted with a metallograph, which performs microstructure photography at magnifications from 25 to 2000 times, and microhardness testers, which investigate surface effects and alloy homogeneity. The lab also utilizes a scan electron microscope (SEM) to inspect topographies of materials. The SEM has a magnification range that encompasses that of optical microscopy and extends it to the nanoscale.

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HiTech Division

EngineeringInternal Bearing GeometryWhen establishing the free state internal bearing geometry for both ball and roller bearings, the specific bearing application details must be carefully considered. These include the bearing loads (radial, axial and moment), speeds, operating temperature range, the specific geometry of the housing and shaft, their fits and the materials of which they are made. Proper bearing function is dependent on all of these variables. The extremes of each variable must be accounted for in the bearing design to ensure that the maximum and minimum installed internal bearing geometries result in optimal running conditions and maximum bearing life. Consult with NHBBs Applications Engineering department for assistance with these special design details. perpendicular to, and intersecting with, the axis of rotation. Track radius describes the cross section of the arc formed by the raceway groove. It is measured when viewed in a direction perpendicular to the axis of rotation. In the context of ball bearing terminology, track radius has no mathematical relationship to track diameter. The distinction between the two is shown here.Track Diameter Track Radius

Radial and Axial PlayMost ball bearings are assembled in such a way that a slight amount of looseness exists between balls and raceways. This looseness is referred to as radial play and axial play. Radial play is the maximum distance that one bearing ring can be displaced with respect to the other in a direction perpendicular to the bearing axis when the bearing is in an unmounted state. Axial play, or end play, is the maximum relative displacement between the two rings of an unmounted ball bearing in the direction parallel to the bearing axis (shown here).Radial PlayGage Load Gage Load Radial Play Gage Load Axial Play

BALL BEARINGS

Axial Play

For any given bearing load in a ball bearing, internal stresses can be somewhat controlled by affecting the geometric relationship between the balls and raceways. When running under a load, force is transmitted from one bearing ring to the other through the ball set. Since the contact area between each ball and the rings is relatively small, even moderate loads can produce stresses of tens or even hundreds of thousands of pounds per square inch. Because internal stress levels have such an important effect on bearing life and performance, internal geometry must be carefully chosen for each application in order for bearing loads to be distributed properly.

Gage Load Gage Load Gage Load

Since radial play and axial play are both consequences of the same degree of looseness between the components in a ball bearing, they bear a mutual dependence. While this is true, both values are usually quite different in magnitude. Radial play can often vary between .0002" and .002", while axial play may range anywhere from .001" to .020". In most ball bearing applications, radial play is functionally more critical than axial play. While radial play has become the standard purchasing specification, users may also specify axial play requirements. It must be kept in mind, however, that the values of radial play and axial play for any given bearing design are mathematically interdependent. 39

Raceway, Track Diameter and Track RadiusThe raceway in a ball bearing is the circular groove formed in the outside surface of the inner ring and in the inside surface of the outer ring. When the rings are aligned, these grooves form a circular track that contains the ball set. The track diameter and track radius are two dimensions that define the configuration of each raceway. Track diameter is the measurement of the diameter of the imaginary circle running around the deepest portion of the raceway, whether it is an inner or outer ring. This measurement is made along a line

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EngineeringInternal Bearing GeometryThese general statements can be made about ball bearing radial play: 1. The initial contact angle of the bearing is directly related to radial playthe higher the radial play, the higher the contact angle. 2. For support of pure radial loads, a low contact angle is desirable. 3. Where thrust loading is predominant, a higher contact angle (or radial play) is necessary. 4. Radial play is affected by any interference fit between the shaft and bearing I.D. or between the housing and bearing O.D.Loaded Contact Angle

applied to a ball bearing, the balls will move away from the median planes of the raceways and assume positions somewhere between the deepest portions of the raceways and their edges. The following drawing illustrates the concept of contact angle by showing a cross sectional view of a ball bearing that is loaded in pure thrust.

Thrust

Thrust

Track CurvatureTrack curvature is an expression that defines the difference between the arc of the raceways track radius and the arc formed by the profile of the slightly smaller ball that runs in that raceway. It is simply the track radius of a bearing raceway expressed as a percentage of ball diameter. This number is a convenient index of fit between the raceway and ball, and is always slightly greater than the corresponding arc of the ball.Track Radius

Free Angle of MisalignmentAs a result of axial and radial play, which is purposely permitted to exist between the components of most ball bearings, the inner ring can be tilted a small amount in relation to the outer ring. This displacement is called free angle of misalignment. The amount of misalignment allowable in a given ball bearing is determined by its radial play and track curvature values. The misalignment capability of a bearing can have positive practical significance because it enables a ball bearing to accommodate small dimensional variations that may exist in associated shafts and housings. The performance of a misaligned bearing will be degraded to a certain extent, but for slight misalignments under reasonably light loads the effects will not be significant in most cases. This concept is shown below. In general, the misalignment a bearing is subjected to due to the shaft and housings physical arrangement should neve

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