Bearing Cross Reference - Gregory Bender
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Gregory Bender
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Bearing cross reference
Here is a bunch of cross-reference material to help you find what you are looking for. Much of this information was harvested from the NSK,
Timken/Torrington, and McMaster-Carr websites.
Table of contents Types of bearings
Ball bearing cross-references
Roller bearing cross-references
Thrust bearing cross-references
Mounted bearing unit cross-references
Types of bearings
U pda t ed : Prior to 2007 Dec 11
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One way to categorize bearings is by the type of rolling element they use. Using this method, there are five types of bearings:
Ball bearings
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Cylindrical roller bearings
Needle roller bearings
Tapered roller bearings
Spherical roller bearings
Ball bearing cross-references
U pda t ed : Prior to 2007 Dec 11
Glossary
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Back to top Radia l bal l bear ings will accommodate moderate to heavy radial loads and low to moderate thrust loads in either
direction.
D eep g r oov e r ad i a l bea r i ngs are manufactured as open type bearings for oil or grease lubrication. They are also available with metal shields and/or
seals for use where moderate contamination is present in the operation.
A ngu l a r c on t ac t bea r i ngs are single row types used where radial and thrust loads are combined in the same application. They provide sufficient internal
clearances to assume a specific contact angle under thrust loading and are available with angles of 15, 30 and 40 degrees.
D oub l e r ow bea r i ngs are manufactured both as filling slot and Conrad types, in light and medium series. The filling slot type has higher load capacity
but the Conrad type provides a quieter operation and should be used when noise is a consideration.
Sel f -A l igning bear ings are manufactured with two rows of balls and one continuous spherical raceway in the outer ring. This allows for limited
misalignment of the shaft and housing.
M ax i m um c apaci t y bea r i ngs are filling slot type bearings used in applications involving heavy radial loads and low speeds where thrust loads are
comparatively low. The incorporated filling slots in the inner and outer rings so they can be loaded with additional balls for greater capacity.
Mas t guide bear ings are bearings with a high load capacity, specially designed for use in fork lift trucks. These bearings are similar to single row or
double row deep groove bearings but the outer race has a very thick cross-section which performs as a wheel or tire. Mast guide bearings can withstand
heavy radial loads and occasional thrust loads. Mounted on the fork carriage they provide smooth action as the forks are raised and lowered.
I n t eg r a l s ha f t bea r i ngs include a shaft with bearing races machined on its OD The outer bearing ring, cage and rolling elements are mounted directly on
the shaft and an inner ring is not required. These are commonly referred to as water pump bearings since that is a major application for them.
Spec ia l bear ings include Inch Series bearings, bearings made specifically for automotive air compressor applications and bearings made with special
bore, width, or OD
I nter change - Single Row Deep Groove Ball Bearings
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Descr ip t ion NSK SKF Tor r / Faf FAG MRC
P/ N Inch Rxx Rxx Sxx Rxx Rxx
Extra small 6xx 6xx 3x 6xx 3x
Extra light 60xx 60xx 91xxK 60xx 1xxK
Light 62xx 62xx 2xx 62xx 2xxS
Medium 63xx 63xx 3xx 63xx 3xxS
Extra thin section 68xx 618xx -- 618xx --
Very thin section 69xx 619xx 93xxK 619xx --
Thin section 16xxx 16xxx -- 16xxx --
Maximum capacity, light BL2xx 2xx 2xxW 2xx 2xxM
Maximum capacity, medium BL3xx 3xx 3xxW 3xx 3xxM
Suf f ix Two seals (contact) DDU 2RS PP 2RSR ZZ
One seal (contact) DU RS P RSR Z
Two shields ZZ 2Z DD 2ZR FF
One shield Z Z D ZR F
Snap ring NR NR G NR G
Steel cage BLANK J BLANK BLANK BLANK
Brass Cage M M MBR M BRZ
Heat stabilized 200C X28 S1 -- S1 --
Tight clearance C2 C2 H C2 Tight
Normal clearance BLANK BLANK R BLANK Normal
Loose clearance C3 EM(C3) P C3 Loose
Extra loose clearance C4 C4 J C4 Extra Loose
Electric motor grade E QE6 -- -- --
I nterchange - Double Row Ball Bearings
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Descr i p t ion NSK SKF Tor r / Faf MRCP/ N Self-aligning, extra narrow 12xx 12xx -- --
Self-aligning, narrow 133xx 13xx -- --
Self-aligning, wide 22xx 22xx -- --
Self-aligning, extra wide 23xx 23xx -- --
Double row, max imum compliment, light 32xx 52xxE 52xxW 52xxM (K)
Double row, max. compliment, medium 33xx 53xxE 53xxW 53xxM (K)
Double row, conrad, light 52xx 52xxA 52xxK 52xxC(SBK)
Double row, conrad, medium 53xx 53xxA 53xxK 53xxC (SB)
Suf f ix Two seals 2RS 2RS1 -- --
Two shields ZZ 2Z -- FF
Snap ring NR NR G G
polyamide cage TNG TN9 pRB --
Steel cage J BLANK BLANK BLANKTapered bore K K -- --
Extra capacity E E -- --
Tight clearance C2 C2 H C2
Normal clearance BLANK BLANK R BLANK
Loose clearance C3 C3 p C3
Extra loose clearance C4 C4 J C4
I nter change - Angular Cont act (ABEC 1 & 3) Ball Bearings
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Descr ip t ion NSK SKF Tor r / Faf FAG MRC
P/ N Light 72xx 72xx 72xx 72xx 72xx
Medium 73xx 73xx 73xx 73xx 73xx
Heavy 74xx 74xx 74xx 74xx 74xx
Suf f ix 40 deg. contact B B WN B pJ
30 deg. contact A -- -- -- BLANK
25 deg. contact A5 ACD -- E --
15 deg. contact C CD -- C R
Machined brass cage M M MBR Mp BRZ
pressed brass cage Y Y BLANK Yp --
polyamide cage TY p pRC TVp BKE
Steel cage W J -- Jp BLANK
Flush ground faces G G BLANK UO,UA DU
petrochemical BMpC BECBM -- -- pumppac*
Roller bearing cross-references
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Glossary - Cylindrical Roller Bearings
NU s ty le s ingle row - NU style bearings have two machined flanges on the outer ring and no flanges on the inner ring.
N Sty le s ingle row - N style bearings have two machined flanges on the inner ring and no flanges on the outer ring, with
rollers and cage on the inner ring. Like the NU style, the N has no thrust load carrying capability.
NJ s ty le s ingle row - NJ style bearings have two machined flanges on the outer ring and a machined flange on one side of the inner ring. The roller and
cage assembly is in the outer ring. The integral flange on the inner ring allows this bearing to carry an axial load.
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NF s ty le s ingle row - NF style bearings have two machined flanges on the inner ring and one flange on the outer ring, with roller and cage on the inner
ring. Like the NJ bearing, these bearings have some thrust load capability.
NH s ty le s ingle row - NH style bearings have two machined flanges on the outer ring and a machined flange on one side of the inner ring. A special-
design inner ring allows use of a stabilizing ring on the non-flange side. As a result, these bearings can carry axial loads in both directions. The roller and
cage assembly is mounted in the outer ring.
NUP s ty le s ingle row - NUP style bearings are similar to the NJ style and come with a special ring often called a thrust collar. Mounted on the non-flange
side of the inner ring, the thrust collar allows the bearing to carry an axial load in both directions. The thrust collar extends out of the bearing on one side,
so the dimension across the inner ring is slightly greater than that of the outer ring.
Double row s ty les (NN, NNU) - Double Row cylindrical roller bearings are denoted by two N's within the part number (e.g., NN or NNU). The
dimensions for these can be found in the Super Precision section of this catalog and can be ordered with standard precision.
S-Type - Sealed-Clean Bearings for chain conveyors demonstrate a high efficiency under high temperatures and wet conditions for a longer period with an
improved sealing system. These bearings are packed with a quality grease of high thermal resistance and durability.
Cont inuous Cas ter Rol ler Bear ings - These are 2-split bearing units of a highly reliable design and feature a long service life. Cylindrical roller bearings
with self-aligning rings having a proper alignment function.
Four Row Cy l indr ica l Rol ler Bear ings - Are also popular roll neck bearings providing several benefits. First, the inner ring is separable form the outer
ring and rollers which allows the inner ring to remain with the roll during grinding processes. This assures precise concentricity and negligible run-out
providing for high rolling accuracy. Secondly, this design allows for greater radial load carrying and higher operating speeds. Four row cy lindricals must be
used in combination with a thrust bearing which is usually a two row taper, angular contact ball bearings, or a deep groove ball bearing depending on the
thrust load present.
I nterchange - Cylindrical Roller Bearings
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Descr ip t ion NSK SKF FAG
Pref ix Single row, no flanges on outer ring N N N
Single row, no flanges on inner ring NU NU NU
Single row, 1 flange inner NJ NJ NJ
Single row, 1 flange outer NF NF --
Single row, 1 flange inner, with retaining ring NUP NUP NUP
Single row, 1 flange inner w/stabilizing ring NH NH NH
Double row, flanges outer/flanges inner HJ HJ HJ
NNU /NN NNU/NN NNU/NN
P/ N Light 2XX 2XX 2XX
Medium 3XX 3XX 3XX
Heavy 4XX 4XX 4XX
Extra Light 10XX 10XX 10XX
Light, Wide 22XX 22XX 22XX
Medium, Wide 23XX 23XX 23XX
Suf f ix Ployamide cage T P TVP2
Composite high temp (200C) cage T7 -- --
Machined brass cage M M M,M1
Pressed steel cage W,WS J JP1
High capacity design E EC E
Full complement (no cage) V V V
Tight clearance C2 C2 C2
Normal clearance BLANK BLANK BLANK
Loose clearance C3 C3 C3
Extra loose clearance C4 C4 C4
Glossary - Spherical Roller Bearing s
Spher ica l Rol ler Bear ings - Are double row self-aligning bearings capable of carrying heavy radial loads combined with moderate thrust loads in either
direction. They are extremely resistant to shock loads and their self-aligning feature allows full capacity loading despite shaft deflection.
Cont inuous Cas ter Rol lers - These are 2-split bearing units of a highly reliable design and feature a long service life. Cylindrical roller bearings with self-
aligning rings having a proper alignment function.
Spher ica l Rol ler Bear ings TL Ser ies - Excellent performance with high temperature equipment. High strength to prevent inner ring fractures.
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Shaker Sc reen Bear ings - Are designed for vibrating applications such as screens, feeders and compactors. These are self-aligning spherical roller
bearings designed to accommodate the high loads, static and dynamic misalignment characteristics, and severe environmental c onditions inherent in
these applications.
Tr ip le R ing Bear ings - Are specially designed for use with controlled crown rolls used extensively in the paper industry. These high load capacity
bearings provide shaft within shaft operation, while simplifying the surrounding structure and installation.
I nterchange - Spherical Roller Bearings
Descr i p t ion NSK SKF Tor r / FAF FAG
P/ N Very Light 239xx 239xx 239xx 239xx
Light 230xx 230xx 230xx 230xx
Light, Wide 240xx 240xx 240xx 240xx
Medium 231xx 231xx 231xx 231xx
Medium, Wide 241xx 241xx 241xx 241xx
Heavy 222xx 222xx 222xx 222xx
Heavy, Wide 232xx 232xx 232xx 232xx
Extra Heavy 213xx 213xx 213xx 213xx
Extra Heavy, Wide 223xx 223xx 223xx 223xx
Suf f ix Bronze case, one piece, guide ring CAM,AM CA,CACM YM M
Bronze cage, two piece, guide flange M MC BR MB
Steel cage, two piece, guide ring C,CD CJ,CC CJ, VJ BLANK
Polyamide cage, two piece H -- VCF TVPB
Tapered bore 1:12 K K K K
Tapered bore 1:30 K30 K30 K K30
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Carburized steel, complete bearing g ECD W40 W209
Carburized steel, inner ring only g3 ECB W401 W209B
Lube groove & holes outer ring E4 W33 W33 S
Lube groove & holes outer ring, holes inner ring E7 W513 W33W94 Sheading0AB
Holes only outer ring E3 W20 W20 SY
Holes only inner ring E5 W26 W94 heading0AB
No relube features BLANK BLANK BLANK --
Plugs provided for outer ring holes E42 W77 W84 heading0
Combination W33, W4, W31 E4P53 W507 W33W4W31 --
Combination W33, W31 E4U22 W506 W33W31 --
Combination W33, W26, W31 E7U22 W509 W33W94W31 Sheading0A
Outer ring w/extra close running accuracy P52 C04 C04 T52BN
Inner ring w/extra close running accuracy P53 C02 C02 T52BE
Inner & outer ring w/extra close running accuracy P55 C08 C08 T52BW
Special inspection measures U22 W31 W31 --
Inner ring & outer ring heat stabilized to 200C S11 S1 -- --
Tight clearance C2 C2 C2 C2
Normal clearance BLANK BLANK BLANK BLANK
Loose clearance C3 C3 C3 C3
Extra loose clearance C4 C4 C4 C4
Glossary - Tapered Roller Bearings
Four Row Tapered Rol ler Bear ings Are very popular for use on roll necks. Most of these bearings are composed of two double cones (four Inner ring
raceways), a cone spacer, two single cups (one at each end), one double cup (the center two raceways in the outer rings), and two cup spacers. They are
very effective at operating under heavy r adial and axial loads at low to moderate speeds. NSK four row tapered bearings are standardly supplied with
carburized rings and rollers and are compatible with industry standards. Sealed-Clean bearings are four row tapers with seals for the harshest of
operating environments. NSK's patented design provides the optimum sealing efficiency with only a slight loss of capacity.
Two Row Tapered Rol ler Bear ings Are very common as the back-up thrust bearing in a rolling mill or as the roll neck in lighter duty rolling mills. Two
row tapers are designed in a v ariety of styles for different applications. Converging bearings (TD I, TDIE, TDIS) consist of one double cone and two single
cups possibly with a cup spacer. Diverging bearings (TDO, TDOD, TDOC) consist of two single cones, a cone spacer, and one double cup.
I nterchange - I nch Tapered Roller Bearings
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B i f G B d
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Descr ip t i on NSK SKF Tim k en FAG
Pref ix Extra heavy EH EH EH KEH
Heavier than heavy HH HH HH KHHHeavy H H H KH
Heavy medium HM HM HM KHM
Medium M M M KM
Light medium LM LM LM KLM
Light L L L KL
Lighter than light LL LL LL KLL
Extra light EL EL EL KEL
Cup Angle 0 to 2359'59.99 1xxxx 1xxxx 1xxxx 1xxxx
24 to 2529'59.99 2xxxx 2xxxx 2xxxx 2xxxx
2530' to 2659'59.99 3xxxx 3xxxx 3xxxx 3xxxx
27 to 2829'59.99 4xxxx 4xxxx 4xxxx 4xxxx
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2830' to 3029'59.99 5xxxx 5xxxx 5xxxx 5xxxx
3030' to 3229'59.99 6xxxx 6xxxx 6xxxx 6xxxx
3230' to 3559'59.99 7xxxx 7xxxx 7xxxx 7xxxx
36 to 4459'59.99 8xxxx 8xxxx 8xxxx 8xxxx
45 up, but not thrust only conforms to AFBMA standard case carburized cup & cone 9xxxx 9xxxx 9xxxx 9xxxx
R
G
I nterchange - Metr ic Tapered Roller Bearings
Descr ip t i on NSK SKF Ti m k en FAG
P/ N High capacity design HR -- -- --
Light HR302xx 302xx 302xx 302xx
Medium HR303xx 303xx 303xx 303xx
Medium, steep angle HR303xxD 313xx 313xx 313xx
Extra light, wide HR329xx 329xx 329xx 329xx
very light, wide HR320xx 320xx 320xx 320xx
Light, wide HR322xx 322xx 322xx 322xx
Medium, wide HR323xx 323xx 323xx 323xx
Very light, extra wide HR330xx 330xx 330xx 330xx
Light, extra wide HR331xx 331xx 331xx 331xx
Medium, extra wide HR332xx 332xx 332xx 332xx
Suf f ix Medium contact angle C B B B
Steep contact angle D -- -- --
Modified internal design X X X X
Conforms to ISO 355 J -- -- A
Thrust bearing cross-references
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Glossary
Cy l indr ica l ro l ler thrus t bear ings (TMP) - These are thrust bearings containing cylindrical rollers. They can sustain only
axial loads, but they are suitable for heavy loads and have high axial rigidity. The cages are machined brass.
Tapered ro l ler th rus t bear in gs (TT, TTF or V-F lat ) - These are thrust bearings containing tapered rollers. TT-type bearings, which have a rib on the
housing washer, can accurately guide the shaft in the radial direction. TTF-type bearings, which have no rib on the housing washer, can tolerate some
eccentricity during operation.
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The ba l l t h r us t bea r i ngs are designed to handle thrust loads while operating at high speeds. These bearings can be ordered with an aligning seat and
aligning washer if misalignment or deflection can not be avoided.
The s phe r i ca l t h r u s t bea r i ngs are designed to handle very heavy thrust loads in one direction while operating at low to moderate speeds. The design of
the spherical thrust will also allow for some radial load while thrust load is imposed. The spherical shape of the outer ring raceway makes these bearings
excellent for handling misalignment.
I nterchange - Ball Thrust Bearings
Descr ip t ion NSK SKF FAG
P/ N Single direction 511xx 511xx 511xx
Single direction 512xx 512xx 512xx
Single direction 513xx 513xx 513xx
Single direction 514xx 514xx 514xx
Sing le di rec ti on wi th a li gn ing sea t 532xx 532xx 532xx
Sing le di rec ti on wi th a li gn ing sea t 533xx 533xx 533xx
Sing le di rec ti on wi th a li gn ing sea t 534xx 534xx 534xx
Double direction 522xx 522xx 522xx
Double direction 523xx 523xx 523xx
Double direction 524xx 524xx 524xx
Double di re ct ion w ith a li gn ing seat 542xx 542xx 542xx
Double di re ct ion w ith a li gn ing seat 543xx 543xx 543xx
Double di re ct ion w ith a li gn ing seat 544xx 544xx 544xx
Suf f ix Steel cage BLANK J FP
Brass cage M M MP
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Boundary dimensions adopted to ISO X -- X
With self-aligning seat washer U U U
ABEC 5 precision class P5 P5 P5
I nterchange - Spherical Thrust Bearings
Descr i p t ion NSK SKF FAG Tor r ing t on
P/ N Light 292xx 292xx 292xx 292xx
Medium 293xx 293xx 293xx 293xx
Heavy 294xx 294xx 294xx 294xx
Suf f ix Steel Cage H EJ E EJ
Brass Cage M M EMB EM
Mounted bearing unit cross-references
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Glossary
Standard Duty P i l low B locks bear ings are mounted in rigid housings of simple construction. These are the most
common pillow blocks and are used extensively for various kinds of power transmission in stationary equipment and
machinery.
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Standard Duty , Low Base P i l low B locks are basically the same design as standard pillow blocks, however the lower base provides a lower center of
operation. This makes the unit particularly suitable when space between the center and the mounting base is limited.
Cy l indr ica l Car t r idge Bear ings are designed to provide shaft support where the shaft axis is perpendicular to and passing through a solid support, in a
location where the cartridges can be mounted with a press rather than bolt flanges.
S t anda r d D u t y , 4 - bo l t F l ange units have square flanges which can be easily attached to a mounting surface with four bolts. This simple method of
installation makes this unit convenient for applications where frequent disassembly may be required.
S t anda r d D u t y , 4 - bo l t F l ange have the same design as the set-screw type, however the distance between bearing center and flange back face is longer,
to provide sufficient clearance to use a bearing with an eccentric locking collar.
S t anda r d D u t y 2 - bo l t F l ange units have a housing with an oval flange with two bolt holes for mounting. This type of unit is easily installed and is
suitable where mounting space is limited or where it is necessary to minimize the distance between shafts.
I nterchange - Mounted Bearing Units
Descr ip t ion NSK SKF Tor r / FAF Seal Mast er
I ns e r t Bearing, tapered bore w/adaptor, relube UK -- -- --
Bearing, set screw, wide ir, relube UC YAR2 GCxxxxKRRB 2-xx
Bearing, set screw, narrow ir, non-relube UB -- -- V
Bearing, ecc locking collar, narrow ir, non-relube EN YET2 GRAxxxxRRB VxxE
Bearing, ecc locking collar, wide ir, relube EW YEL2 GxxxxKRRB R-xxE
Pref ix Block, tapped-base with set screw UCPA -- -- TB
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Bearing cross reference - Gregory Bender
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8/2/2019 Bearing Cross Reference - Gregory Bender
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Bearing cross reference Gregory Bender
Block, with set screw UCP SYxxTM RASC NP
Block, eccentric locking collar, narrow ir ENP SYxxFM VAS VPxxE
Block, eccentric locking collar EWP -- RAS RPxxE
Block, low base with set screw UCPLL -- YAK NPL
Block, low base w/ecc locking collar, narrow ir ENLPL SYHxxFM VAK VPLxxE
Block, low base w/ecc locking collar EWPLL SYHxxWM RAK RPL
Flange, square, with set screw UCF FYxxTM RCJC SF
Flange, square, with set screw UCFX FYMxxTM -- MSF
Flange, square, w/ecc locking collar, narrow ir ENF FYxxFM VCJ VFxxE
Flange, square, w/ecc locking collar EWFH FYxxWM RCJ RFxxE
Flange, oval, with set screw UCFL FYTxxTM RCJTC SFT
Flange, oval, w/ecc locking collar, narrow ir ENFL FYTxxFM VCJT VFTxxE
Flange, oval, w/ecc locking collar EWFLH FYTxxWM RCJT --
Flange, oval, w/ecc locking collar EWFL -- -- RFTxxE
Flange, pressed steel, oval w/set screw UBPFL -- -- SSFT
Flange, pressed steel, oval w/ecc locking collar ENPFL FTPxxFM RAT SSFTxxE
Flange, round, cartridge w/set screw UCFC -- -- SFC
Flange, round, cartridge w/ecc locking collar EWFC -- -- SFCxxE
Flange, offset, 3 bolt w/set screw UCFK -- -- RB
Take-up type T TB RTU RT
P/ N Pressed steel cover Z *Y -- AVAIL
Cast iron cover C -- -- --
Standard series, metric 2XX XX XX S-2xx
Medium series, metric 3XX -- -- --
Medium series, metric Xxx Mxx -- 53xx
Standard series, inch (see shaft size chart) 2xx-xxS x-x/x x-x/x -xx
Medium series, inch (see shaft size chart) 3xx-xxS x-x/x x-x/x -xx
Suf f ix Spher ical hous ing bo re to lerance cl ass J7 J
Inch size set screw in locking device U
Improved set screw design W
*Prefix
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