SECTION B Sprocket

7/21/2019 SECTION B Sprocket

1/16

IndexSECTION B

B-1

INTERCHANGEABLE BUSHINGSPRODUCT PAGEINDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

QD

QD BUSHING INSTALLATION/REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-2

ALL STEEL QD BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3

STANDARD QD BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4

QD SHORT BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5

QD & QD SHORT WELD-ON HUBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-6

TAPER BUSHINGS

TAPER BUSHING INSTALLATION/REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7

NO. 1008 3030 TAPER BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8

NO. 3535 5050 TAPER BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9

NO. 4030 5040 SHORT TAPER BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9

NO. 6050 120100 TAPER BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .B-10

TAPER BUSHED TYPE S & TYPE W WELD-ON HUBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-11

METRIC AND REBORABLE TAPER BUSHING DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-12

MST BUSHINGS

MSTINSTALLATION & REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-13

MST

BUSHING SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-14

MSTWELD-ON HUBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-15

IDLER BUSHINGS: QD, MST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-16

Section B_B1-B16 3/28/14 5:27 PM Page B-1


2/16

Stock QDBushings

MartinMOUNTING PROCEDURE QD BUSHINGSIMPORTANT BE SURE TAPERED CONE SURFACES OF QD BUSHING AND INSIDE OF SHEAVE OR SPROCKET HUB ARE DRY AND FREE OF ALL

FOREIGN SUBSTANCES SUCH AS PAINT, GREASE, OR DIRT.STANDARD Mounting Assembly FOR QD SHEAVES AND SPROCKETS

MOUNTING1. Be sure the tapered cone surfaces of the bushing and the inside of the

driven product are clean and free of anti-seize lubricants.

2. Slide QD bushing on shaft, flange end first. Assemble key.

3. Position QD bushing on shaft. Tighten set screw over key hand tightwith standard Allen wrench only. Do not use excessive force.

4. Slide large end of sheave or sprocket taper bore into position over conealigning drilled bolt holes in sheave or sprocket with tapped holes inflange of bushing. Assemble pull-up bolts and lock washers.

NOTE: Install M thru S bushings in the hub so that the two extra holesin the hub are located as far as possible from the bushing's saw cut.

5. Tighten pull-up bolts alternately and evenly to tightness indicated intorque table on back. Do not use extensions on wrench handles. Thereshould be a gap between the face of the sheave or sprocket hub and the

flange of the QD bushing to insure a satisfactory cone grip and press fit. CAUTION: THIS GAP MUST NOT BE CLOSED.

DISMOUNTING1. Remove pull-up bolts

and screw them intoTAPPED holes insheave or sprocket andagainst flange of QDbushing to break conegrip.

2. Loosen set screw andslide QD bushing fromshaft.

WARNING: Because of the possible danger to person(s) or property from accidents which may result from the improper use of products, it is important that correctprocedures be followed: Products must be used in accordance with the engineering information specified in the catalog. Proper installation, maintenance and opera-tion procedures must be observed. The instructions given above must be followed. Inspections should be made as necessary to assure safe operation under prevail-ing conditions. All rotating power transmission products when used in a drive are potentially dangerous and must be guarded by the user as required by applicablelaws, regulations, standards, and good safety practice. (Refer to ANSI Standard B15.1.)

1. Be sure the tapered cone surfaces of the bushing and the inside of the driven product are clean and free of anti-seize lubricants.

2. Assemble sheave or sprocket with bolts inserted (But not tightened) through DRILLED holes in bushing flangeinto TAPPED holes in sheave, sprocket, or other MartinQD part.

3. With key in shaft keyseat, slide assembly into approximate position on shaft with flange end of bushing away frombearing.

4. Position QD bushing on shaft by tightening set screw over key hand tight with standard Allen wrench only. Donot use excessive force.

5. Tighten pull-up bolts alternately and evenly to tightness indicated in torque table below. Do not use extensions onwrench handles. There should be a gap between the face of the sheave or sprocket hub and the flange of the QDbushing to insure a satisfactory cone grip and press fit. CAUTION: THIS GAP MUST NOT BE CLOSED.

1. Remove pull-up bolts and screw them into TAPPED holes in bushing flange and against hub of sheave or sprocketto break cone grip.

2. Loosen set screw in bushing flange and slide QD bushing from shaft.

B

A

C

B

A

C

REVERSE Mounting AssemblyFOR QD SHEAVES AND SPROCKETS USING JA, SH, SD, SDS, SK, SF, E, F, & J BUSHINGS

These bushings, as well as the sprockets and sheaves for them, are each drilled with six holes (three drilled and threetapped) to allow pull-up bolts to be inserted from either side. This enables variations of mounting characteristics to suita particular installation.

B-2



3/16

B-3

All SteelQD Bushings

QD Bushings Steel

Reborable QD bushings

made of Stainless Steel areavailable in many sizes.

Non stock sizes are

available on MTO basis.

F = Length of Mating Bore G = Gap Between QD Bushing and Mating Hub

Dimensions (Inches) Stock Bore Range

Cap Maximum Average

Bushing A B D E F G L Bolt Screws Standard Shallow Weight Circle Required Minimum Keyway Keyway (Approx.)

Bushing Plain Bores Not Split

Shallow Key Dimension Standard

Key Seat Key Keyway Key

Standard Keyway and Key Dimension

Bores Keyway Key

SF-STL 916 3.125 458 112 114 18 2116 378 338 2 12 2516 21316 3.0

E-STL 34 3.834 6 178 158 18 258 5 312 234 78 278 312 10.0

F-STL 1316 4.437 658 21316 212 316 358 558 3916 358 1 3516 4 11.5

J-STL 1 5.148 714 312 3316 316 412 614 358 412 1716 334 412 18.0

M-STL 114 6.500 9 512 5316 316 634 778 434 634 2 434 512 37.0

N-STL 112 7.000 10 658 614 718 818 812 478 812 212 518 578 57.0

Bushing Bores Keyway

78 316 332 316 316

1516 - 114 14 18 14 14

1516 - 138 516 532 516 516

1716 - 134 38 316 38 38

113

16 - 21

4 1

2 1

4 1

2 1

2 2516 - 234 58 516 58 58

21316 - 314 34 38 34 34

3516 - 334 78 716 78 78

31316 - 412 1 12 1 1

4916 - 512 114 58 114 114

5916 - 612 112 34 112 112

6916 - 712 134 34 134 112

7916 - 9 2 34 212 112

9116 - 11 212 78

11116 - 13 3 1

14 132 14 532 34 18 34 12

14 116 14 316 78 116 78 12

38 132 38 732 78 316 78 58

38 116 38 14 1 18 1 58

3

8 1

8 3

8 5

16 11

4 1

4 11

4 7

8 12 132 12 932 112 18 112 78

12 116 12 516 112 14 112 1

12 18 12 38 134 18 134 34

58 116 58 38 134 14 134 78

34 116 34 716 2 14 2 1

14 132 14 532 34 116 34 716

14 116 14 316 34 18 34 12

38 132 38 732 78 116 78 12

38 116 38 14 78 316 78 58

38 18 38 516 1 18 1 58

12 132 12 332 114 14 114 78

12 116 12 516 112 14 112 112 18 12 38 134 18 134 34

58 116 58 38 134 38 134 158 316 58 12 2 14 2 1

SH-STL 12

SD-STL 12

SK-STL 12

SF-STL 11516

E-STL 78 - 11516

F-STL 1 - 2716 - 21516

J-STL 1716 - 21516

M-STL 2 - 21516

N-STL 2716 - 41516

SF-STL

238 - 2916 58 316 258 - 234 58 116 21316 - 278 34 116 21516 34 132

78 - 278 STD. E-STL 21516 - 314 34 18

3516 - 312 78 116

F-STL

1 - 3516 STD. 338 - 334 78 316 378 - 31516 1 18 4 NONE

J-STL

3716 - 334 STD. 31316 - 412 1 18

2 - 434 STD.M-STL 41316 - 512 114 14

212 - 518 STD. N-STL 5316 - 512 114 14 5916 - 578 112 14 Shallow Key Dimension Steel

Key Seat Key Keyway Key



4/16

B-4

StandardQD Bushings

38 - 716 NO K.W. 12 - 1 STD.

JA 1118 - 118 14 - 116 1316 14 - 116 114 NO K.W.

12 - 138 STD

SH1716 - 112 38 116

1916 - 158 38 - 116 11116 NO K.W.

12 - 11116 STD. 134 38 18 SDS 11316 12 18 178 - 11516 12 116 2 NO K.W.

12 - 11116 STD.134 38 18

SD 11316 12 18

178 12 116

11516 12 116 2 NO K.W.

12 - 218 STD.

SK2316 - 214 12 18

2516 - 212 58 116 2916 - 258 NO K.W.

12 - 214 STD.

SF 2516 - 212 58 316

2916 - 234 58 116 21316 - 278 34 116 21516 34 132

78 - 278 STD.E 21516 - 314 34 18

338 - 312 78 116 3516 78 18

1 - 3516 STD.

F 338 - 334 78 316

378 - 31516 1 18 4 NONE

J 114 - 334 STD.

31316 - 412 1 18

M

2 - 434 STD.41316 - 512 114 14

2716 - 5 STD.N 518 - 512 114 14

5916 - 6 112 14

21516 - 51516 STD.P 6 - 612 112 14

6916 - 7 134 18

W

4 - 712 STD.7916 - 812 2 14

Inch Bore Millimeter Bore

Important The metric system does not refer tokeyseat or keyway dimensions as does theEnglish system; instead, dimensions are given forthe key itself which is rectangular in shape, notsquare as in the English system.

NOTE:.03937" = 1mmEx24 mm = 0.94488"

Dimensions (Inches) Stock Bore Range

Cap Maximum Average Bushing A B D E F G L Bolt Screws Standard Shallow Set Screw Weight (lbs) Circle Required Minimum Keyway Keyway Size (Approx.)

JA 0.375 1.375 2.000 0.688 0.563 0.125 1.000 1.665 3-10 1 0.375 1.000 1.250 10-24 0.90

SH 0.438 1.871 2.688 0.875 0.813 0.125 1.250 2.250 3-14 138 0.500 1.375 1.688 14 -20 1.00

SDS 0.500 2.187 3.188 0.875 0.750 0.125 0.938 2.688 3-14 138 0.500 1.688 2.000 14 -20 1.00

SD 0.500 2.187 3.188 0.938 1.250 0.125 1.813 2.688 3-14 178 0.500 1.688 1.938 14 -20 1.50

SK 0.563 2.812 3.875 1.375 1.250 0.125 1.125 3.313 3-516 2 0.500 2.125 2.500 516 -18 2.00

SF 0.563 3.125 4.625 1.500 1.250 0.125 2.000 3.875 3-38 2 0.500 2.313 2.316 516 -18 3.00

E 0.750 3.834 6.000 1.875 1.625 0.125 2.625 5.000 3-12 234 0.875 2.875 3.500 38 -16 10.00

F 0.813 4.437 6.625 2.813 2.500 0.188 3.625 5.625 3-916 358 1.000 3.313 3.938 12 -13 11.50

J 1.000 5.148 7.250 3.500 3.188 0.188 4.500 6.250 3-58 412 1.438 3.750 4.500 58 -11 18.00

M 1.250 6.500 9.000 5.500 5.188 0.188 6.750 7.875 4-34 634 1.938 4.750 5.500 34 -10 37.00

N 1.500 7.000 10.250 6.625 6.250 0.250 8.125 8.500 4-78 812 2.438 5.125 6.000 34 -10 57.00

P 1.750 8.250 11.750 7.625 7.250 0.250 9.375 10.000 4-1 912 2.938 5.938 7.000 78 -9 120.00

W 2.000 10.437 15.000 9.375 9.000 0.250 11.375 12.750 4-118 1112 4.000 7.500 8.500 1-8 250.00

S 3.250 12.125 17.750 12.500 0.375 15.750 15.000 5-114 1512 6.000 8.250 10.000 114 -7 400.00

Bushing Bores Keyway

24, 25 8 7SH 28, 30

32, 35 10 8

24, 2528, 30 8 7

SDS 32, 35 10 838

40, 42 12 8

24, 25 8 728, 30

SD 32, 35 10 838

40, 42 12 8

24, 25 8 728, 30

32, 35 10 8

SK 38

40, 42 12 848, 50 14 9

55 16 10

28, 30 8 7

32, 35 10 838

SF 40, 42 12 848, 50 14 9

55 16 1060 18 11

35, 38 10 840, 42 12 8

E 48, 50 14 955 16 10

60, 65 18 1170, 75 20 12

48, 50 14 955 16 10

F 60, 65 18 1170, 75 20 1280, 85 22 14

90 25 14

50 14 955 16 10

60, 65 18 11J 70, 75 20 12

80, 85 22 1490, 95 25 14100 28 16

TO ORDER:SH 24 mm

Bore Key Stock Size Bushing MM w t

Keystock provided for nonstandard keyways.



5/16

QD ShortBushings

B-5

Dimensions (Inches)

Cap Set

Bushing A B D E L Bolt Screws Screw

Circle Requirred Size

JS 1.00 5.1484 7.25 2.38 3.38 6.25 58 212 (3) 58

MS 1.19 6.5000 9.00 3.62 4.81 7.88 34 3 (4) 34

NS 1.50 7.0000 10.00 4.50 6.00 8.50 78 312 (4) 34

PS 1.50 8.2500 11.75 5.00 6.50 10.00 1 4 (4) 78

WS 1.75 10.4370 15.00 5.50 7.25 12.75 118 5 (4) 1

2716 58 516 19

21516 34 38 17

3716 78 716

15

JS 312 15

31516 1 18

13

4716 10

3716 78 716

38

312 37

31516 1 12

34

MS 4716 30

41516 26

5716 114 14 21

512 20

315161 12

54

4716 49

41516 114 58 43

NS 5716114 14

38

512 37

51516 112 14

31

6 30

41516114 58

76

5716 70

51516 112 34 62

6 62

PS 6716 112 14 55

612 54

61516 134 18

47

7 45

5716 114 58 154

51516 145

6 11

2 3

4 144 6716 136

612 135

WS 61516 126

7 134 34 125

712 114

71516 106

8 105

8716 2 14

94

812 93

Bushing Bores Keyway Weight lbs (approx)

MartinQD Short Bushingsare suitable for use in belt

conveyor applicationswherever the short hubs

of a conveyor pulley

require the QD ShortBushing style.

Dimensions

Inch Bore



6/16

QD & QD ShortWeld-On Hubs

B-6

SFS-A 5.000 1 3.12 4.750 916 378 1 3.0

ES-A 6.250 118 3.83 6.000 58 5 1 5.5

FS-A 7.000 114 4.44 6.750 1116 558 1 7.4 Reverse

JS-A 8.250 158 5.14 8.000 1 614 1 13.8 Mount

MS-A 9.500 238 6.49 9.250 158 778 2 22.9 Only

NS-A 10.250 238 6.99 10.000 1916 8 12 2 26.8

PS-A 12.250 278 8.24 12.000 2 10 2 47.9

WS-A 15.250 338 10.43 14.875 2 716 1234 2 84.2

SS-A 17.500 378 12.12 17.000 234 15 3 121.8

MartinQD Weld-On Hubs are suitable for use inmany applications, such as welding to plate steelsprockets.

QD Weld-On Hubs are made of steel, drilled, tappedand taper bored for QD bushings

QD Weld-On Hubs

Tolerance of D Dimension (or P dimension where applicable) JA-A Thru J-A = (+.000-.002) M-A Thru S-A = (+.000-.003)

Catalog Dimensions Inches Type Weight

Number D L B (nom) P L1 BC Drilling Pounds Mounting

JA-A 2.250 916 1.37 2.125 316 12132 1 0.4SH-A 3.000 1316 1.87 214 1 1.0

SDS-A 3.500 34 2.18 21116 1 1.2 SK-A 4.375 114 2.81 3516 1 3.0

SF-A 5.000 114 3.12 378 1 4.0 E-A 6.250 158 3.83 5 1 9.0 F-A 7.000 212 4.44 558 1 16.0 J-A 7.750 3316 5.14 614 1 22.5

M-A 9.500 5316 6.49 9.250 3916 778 2 50.0 N-A 10.500 614 6.99 10.250 412 812 2 75.0 P-A 13.000 714 8.24 10 2 155.0

W-A 15.500 9 10.43 123

4 2 300.0 S-A 19.500 12 12.12 18.750 712 15 3 558.0

STD orReverseMount

STDMountOnly

Tolerance of P Dimension SFS-A Thru MS-A = (+.000-.004) NS-A Thru PS-A = (+.000-.005) WS-A Thru SS-A = (+.000-.006)

Catalog Dimensions Inches Type Weight

Number D L B (nom) P* L1 BC Drilling Pounds Mounting

TYPE 2TYPE 1 TYPE 3

D

B P

L1L

BC BC BC

MartinQD ShortWeld-On Hubs aredesigned for use inconveyor pulleys.

TYPE 2TYPE 1 TYPE 3

45

B

D

L

BC

35

B

D

L

BC

L1

P

15

BC

QD Short Weld-On Hubs



7/16

B-7

Taper BushingInstallation

IMPORTANT NOTE: Please follow the instructions on this sheet in order for theMartinbushing to perform satisfactorily.

INSTALLATION

1 Clean all oil, dirt, and paint from shaft, bushing bore, outside of bushing and component (sprocket, sheave...etc.) bore.

2 Insert bushing into component. Match the hole pattern, not the threaded holes (each hole will be threaded on one side only.)

3. Thread set or cap screws into those half threaded holes indicated by on above diagram. Mount assembly on shaft.

4. Alternately torque set or cap screws* to recommended torque setting in chart below.

5. On 3535 and larger bushings use a block, sleeve or drift and hammer large end of bushing (do not hammer bushing directly).6. Repeat steps 4 and 5 until torque wrench reading, after hammering, is the same as before hammering.

7. Fill all unoccupied holes with grease.

REMOVAL

1. Remove all set or cap screws.

2. Insert set or cap screws in holes indicated by on drawing. Loosen bushing by alternately tightening set or cap screws.

3. To reinstall, complete all seven (7) installation instructions.

WARNING: Because of the possible danger to person(s) or property from accidents which may result from theimproper use of products, it is important that correct procedures be followed: Products must be used in accordancewith the engineering information specified in the catalog. Proper installation, maintenance and operation proceduresmust be observed. The instructions given above must be followed. Inspections should be made as necessary toassure safe operation under prevailing conditions. All rotating power transmission products when used in a drive arepotentially dangerous and must be guarded by the user as required by applicable laws, regulations, standards, andgood safety practice. (Refer to ANSI Standard B15.1.)

1008, 1108 551/4 - 20 Socket Set Screw



8/16

B-8

Taper BushingsDimensions

Bushings cannot be bored larger than largest bore listed.

For detail dimensions required for machining hubs, consult factory.

Key furnished for these sizes only.

For general reference. Severe conditions may require larger hub. Heavy well-located web may permit

smaller hub. Hub diameter required depends on the particular application. Consult Martingiving fullinformation on the proposed design. Hub diameters shown are based on 20,000, 30,000, and 50,000

P.S.I. minumum ultimate tensile strength respectively for Class 20 gray iron, Class 30 gray iron, and

steel hubs.

2 screws required. Use in positions shown for tightening bushing on shaft. In removing bushing from

shaft, remove screws and use one of them in the other hole. Bushing price includes screws.

Space required to tighten bushing. Also space required to loosen screws to permit removal of hub by

puller.

Space required to loosen bushing using one screw as jackscrew no puller required.

Standard hex key cut to minimum usable length.

Bushing Wt. lbs Bushing Shaft Number Bore (appr) Keyseat Keyseat

12 to 916 .27 18 116 18 116 1008 58 to 78 .21 316 332 316 332 1516 to 1 .16 14 116 14 18

12 to 916 .33 18 116 18 116 1108 58 to 78 .27 316 332 316 332 1516 to 1 .22 14 18 14 18 1116 to 118 .17 14 116 14 18

12 to 916 .61 18 116 18 116 1210 58 to 78 .55 316 332 316 332 1516 to 114 .49 14 18 14 18

12 to 916 .8 18 116 18 116 1215 58 to 78 .7 316 332 316 332 1516 to 114 .6 14 18 14 18

12 to 916 .7 18 116 18 116 1310 58 to 78 .7 316 332 316 332 1516 to 114 .6 14 18 14 18

15

16 to 13

8 .65

16 5

32 5

16 5

32 12 to 916 .9 18 116 18 116 58 to 78 .8 316 332 316 332 1610 1516 to 114 .7 14 18 14 18 1516 to 138 .7 516 532 516 532 1716 to 112 .6 38 316 38 316 1916 to 158 .5 38 18 38 316

12 to 916 1.2 18 116 18 116 58 to 78 1.1 316 332 316 332 1615 1516 to 114 1.0 14 18 14 18 1516 to 138 .8 516 532 516 532 1716 to 112 .7 38 316 38 316 1916 to 158 .6 38 18 38 316

12 to 916 1.7 18 116 18 116 58 to 78 1.6 316 332 316 332 1516 to 114 1.5 14 18 14 18 2012 1516 to 138 1.4 516 532 516 532 1716 to 134 1.2 38 316 38 316 11316 to 178 1.0 12 14 12 14 11516 to 2 1.0 12 316 12 14

1

2 to9

16 3.51

8 1

16 1

8 1

16 58 to 78 3.4 316 332 316 332 1516 to 114 3.3 14 18 14 18 2517 1516 to 138 3.2 516 532 516 532 1716 to 134 3.0 38 316 38 316 11316 to 214 2.4 12 14 12 14 2516 to 212 1.9 58 316 58 516

34 to 78 4.9 316 332 316 332 1516 to 114 4.7 14 18 14 18 2525 1516 to 138 4.5 516 532 516 532 1716 to 134 4.2 38 316 38 316 11316 to 214 3.3 12 14 12 14 2516 to 212 2.5 58 316 58 516

1516 to 114 6.5 14 18 14 18 1516 to 138 6.3 516 532 516 532 3020 1716 to 134 6.0 38 316 38 316 11316 to 214 5.3 12 14 12 14

2516 to 234 4.5 58 516 58 516 21316 to 3 3.9 34 14 34 38

1516 to 114 9.2 14 18 14 18

15

16 to 13

8 8.95

16 5

32 5

16 5

32 3030 1716 to 134 8.6 38 316 38 316 11316 to 214 7.6 12 14 12 14 2516 to 234 6.2 58 516 58 516 21316 to 3 5.0 34 14 34 38

1008 1.386 78 238 2316 11516 12164 14 12 118 58 114 34 1108 1.511 78 212 2516 2116 12964 14 12 118 58 114 34 1210 178 1 358 314 278 134 38 58 138 1316 158 1116 1215 178 112 318 278 258 134 38 58 138 1316 158 1116

1310 2 1 334 338 3 178 38 58 138 1316 158 1116 1610 214 1 4 358 314 218 38 58 138 1316 158 1116 1615 214 112 312 314 3 218 38 58 138 1316 158 1116 2012 234 114 434 438 378 258 716 78 1916 1516 2 138

2517 338 134 512 478 438 314 12 1 158 1 214 158 2525 338 212 434 412 414 314 12 1 158 1 214 158 3020 414 2 7 614 558 4 58 114 11316 1316 21116 2116 3030 414 3 614 534 538 4 58 114 11316 1316 21116 2116

Dimensions C

Class Class L M

Bushing 20 30 Standard StandardNumber A B Gray Gray Steel D F Hex. Short Hex. Short

Iron Iron Key Key Key Key

C(HUBDIAM.)

D(BOLTCIRCLES)

B

A

L

M A

A

F

SECTION A-A

POSITION OF SCREWTO TIGHTEN BUSHING

8 TAPERINCLUDED ANGLE

SET SCREW

FOR TIGHTENING ON SHAFT:HUB HALF OF HOLE THREADED,BUSHING HALF OF HOLE NOT THREDED

FOR REMOVING FROM SHAFT:

BUSHING HALF OF HOLE THREADED.

HUB HALF OF HOLE NOT THREADED.

55

85

No. 1008 to 3030 Taper Bushings



9/16

B-9


No. 3535 to 5050 Bushings


For detail dimensions required for machining hubs, consult factory.

Key furnished for these sizes only.

For general reference. Severe conditions may require larger hub. Heavy well- located web may permit smaller hub. Hub diameter required depends on the

particular application. Consult factory giving full information on the proposed design. Hub diameters shown are based on 20,000, 30,000, and

50,000 P.S.I. minumum ultimate tensile strength respectively for Class 20gray iron, Class 30 gray iron, and steel hubs.

3 screws required. Use in positions shown for tightening bushing on shaft. Inremoving bushing from shaft, remove screws and use two of them in the

other two holes. Bushing price includes screws. See following footnote.

Provide sufcient space to tighten and loosen bushing. Width across ats ofscrew head is same as screw diameter which is shown in column F.

1316 to 114 14 14 18 14 18 1516 to 138 14 516 532 516 532

17

16 to 13

4 133

8 3

16 3

8 3

16 3535 11316 to 214 12 12 14 12 14 5 312 734 7 612 4.83 12 112 39 2516 to 234 11 58 516 58 516 21316 to 314 9 34 38 34 38 3516 to 312 8 78 14 78 716

1716 to 134 22 38 316 38 316 11316 to 214 21 12 14 12 14 2516 to 234 19 58 516 58 516 4040 21316 to 314 17 34 38 34 38 534 4 912 812 734 5.54 58 134 40 3516 to 358 15 78 716 78 716 31116 to 334 14 1 14 78 716 31316 to 4 13 1 14 1 12

11516 to 214 30 12 14 12 14 2516 to 234 28 58 516 58 516 4545 21316 to 314 26 34 38 34 38 638 412 1012 912 834 6.13 34 2 40 3516 to 334 23 78 716 78 716 31316 to 414 20 1 12 1 12 4516 to 412 18 1 14 1 12

2516 to 234 38 58 516 58 516 21316 to 314 35 34 38 34 38 5050 3516 to 334 32 78 716 78 716 7 5 1112 1012 912 6.72 78 214 37 31316 to 412 27 1 12 1 12 4916 to 5 24 114 716 114 58

C

(HUBDIAM.)

D

(BOLTCIRCLES)

B

A

L

MA

A

F

SECTION A-A

POSITION OF SCREW

TO TIGHTEN BUSHING

8 TAPER

INCLUDED ANGLE

SOCKET HEAD CAP SCREWS

FOR TIGHTENING ON SHAFT:

HUB HALF OF HOLE THREADED.

BUSHING HALF OF HOLE NOT THREADED

FOR REMOVING FROM SHAFT:

BUSHING HALF OF HOLE THREADED.

HUB HALF OF HOLE NOT THREADED.

55

5260

C Class Class Bushing Bore Weight Bushing Shaft A B 20 30 Steel D F G R Number Keyseat Keyseat Gray Iron Gray Iron

No. 4030 to 5040 Short Taper Bushings

1716 to 134 24 38 316 38 316 11316 to 214 21 12 14 12 14 2516 to 234 20 58 516 58 516 4030 21316 to 314 18 34 38 34 38 534 3 912 812 734 5.54 58 134 39 3516 to 31116 15 78 716 78 716 334 13 78 316 78 716 31316 13 1 12 1 12 378 to 4716 13 1 14 1 12

11516 to 214 31 12 14 12 14 2516 to 234 29 58 516 58 516 4535 21316 to 314 25 34 38 34 38 638 312 1012 912 834 6.13 34 2 40 3516 to 31116 23 78 716 78 716 31316 to 414 20 1 12 1 12 438 to 412 17 1 14 1 12 434 to 41516 15 114 14 114 58

2716 to 234 40 58 516 58 516 21316 to 314 37 34 38 34 38 5040 3516 to 334 33 78 716 78 716 7 4 1112 1012 912 6.72 78 214 37 31316 to 412 29 1 12 1 12 434 to 5 23 114 14 114 58

C Class Class Bushing Bore Weight Bushing Shaft A B 20 30 Steel D F G R Number Keyseat Keyseat Gray Iron Gray Iron



10/16

B-10



For detail dimensions required for machining hubs, consult Martin.

For general reference. Severe conditions may require larger hub. Heavy

well- located web may permit smaller hub. Hub diameter required depends

on theparticular application. Consult Martingiving full information on theproposed design. Hub diameters shown are based on 20,000, 30,000, and

50,000 P.S.I. minumum ultimate tensile strength respectively for Class 20

gray iron, Class 30 gray iron, and steel hubs.

3 screws for 6050; four for 7060 to 10085; six for 120100. Use in positions

shown for tightening bushing on shaft. In loosening bushing, remove

screws and use all except one in the other holes. Bushing price includes

screws.

Space required to tighten bushing. Also space required to loosen screws

to permit removal of hub by puller.

Space required to loosen bushing using screws as jackscrews no puller

required.

Not currently stocked Available on order.

6050 31316 to 412 60 1 12 1 12 4916 to 512 55 114 58 114 58 914 5 17 1512 1312 9 634 114 312 158 438 5916 to 6 50 112 34 112 34

7060 4916 to 512 85 114 58 114 58 5916 to 612 75 112 34 112 34 1014 6 1812 17 1434 10 734 114 312 158 438 6916 to 7 65 134 34 134 34

8065 5116 to 512 120 114 58 114 58 5916 to 612 105 112 34 112 34 1114 612 19 1712 1512 11 834 114 312 158 438 6916 to 712 90 134 34 134 34 7916 to 8 75 2 34 2 34

10085 6916 to 712 260 134 34 134 34 7916 to 9 230 2 34 2 34 1434 812 2312 22 1912 1412 1134 112 414 2 538 9116 to 10 190 212 78 212 78

120100 7916 to 9 410 2 34 2 34 9116 to 11 360 212 78 212 78 1714 10 28 26 23 17 1414 112 414 2 538 11116 to 12 290 3 1 3 1

No 6050 to 120100 Taper Bushings C

Class Class Bush Bore Weight Bushing Shaft A B 20 30 Steel D E F L M Number Keyseat Keyseat Gray Iron Gray Iron

6050 7060 to 10085

NO. 120100



11/16

MartinTaper Bushed Type S Weld-On Hubs are suitable for use in many applicationssuch as for welding to plate steel sprockets. The outside diameters of these hubs

have been reduced to a minimum. This is permissible because of the reinforcingstrength of the items to which they are to be welded. Cases where the attached item

is of small dimensions should be referred to Martin.

Type S Weld-On Hubs are made of steel, drilled, tapped, and taper bored for Tapered

Bushings. Their small size and the convenience and advantages of Taper Bushed

construction make them of great value on many devices for use on shafts.

B-11

Taper Bushed Type S-Type WWeld-On Hubs Dimensions

Type WA Weld-On Hubs are made of steel, drilled, tapped, and taper bored to

receive Tapered Bushings. They are very useful for welding into fan rotors, pulleys,

plate sprockets, impellers, agitators, and many other devices which must be rmly

fastened to the shaft.

WA12 to WA50 WA60 to WA100

See dimension tables on preceeding page for bushing data and wrench space required. + .000-.002 + .000-.003 + .000-.004

See dimension tables on preceeding page for bushing data and wrench space required. + .000-.002 + .005-.010 + .001-.003 + .000-.005 + .010-.010

Taper Bushed Type WA Weld-On Hubs

Taper Bushed Type S Weld-On Hubs

Type S

Type WA

S16-4 1610 158 .9 3 1 .275 .725 278 214 S16-6 1610 158 .9 3 1 .450 .550 278 214 S20-6 2012 2 1.8 3916 114 .450 .800 3716 234

S20-8 2012 2 1.4 3916 114 .570 .680 3716 234

S25-6 2517 212 2.6 414 134 .450 1.300 418 338 S25-8 2517 212 2.6 414 134 .565 1.185 418 338 S25-10 2517 212 2.5 414 134 .685 1.065 418 338

S25-16 2517 212 2.4 414 134 1.090 .660 418 338 S30-10 3020 3 4.3 514 2 .675 1.325 518 414 S30-16 3020 3 4.2 514 2 1.090 .910 518 414 S35 3535 312 12.8 612 312 1.160 2.340 638 5

WA12 1215 114 1.3 278 112 38 58 38 212 238 178 258 WA16 1615 158 1.5 314 112 38 58 38 278 234 214 3 WA25 2517 212 4.0 478 134 12 34 38 438 414 338 458 WA30 3030 3 8.6 512 3 34 34 14 518 41316 418 5

WA35 3535 312 15 634 312 114 1 38 614 51516 5 6 WA40 4040 4 29 734 4 112 1 38 714 678 534 7

WA45 4545 412 42 834 412 134 1 38 8 758 638 8 WA50 5050 5 57 912 5 134 1 38 834 838 7 834

WA60 6050 6 115 1314 5 134 114 1214 1178 914 WA70 7060 7 155 1412 6 214 114 1312 1314 1014

WA80 8065 8 180 1514 612 214 114 1414 14 1114 WA100 10085 10 340 1934 812 312 112 1834 1814 1434

For Use with Max. Hub Bushing Bore of Weight A B C D G J Number Number Bushing

For Use with Max. Hub Bushing Bore of Weight A B C D F G H J K Number Number Bushing



12/16

B-12

Taper BushingsMetric and Reborable

Stock Taper Bushings With Metric Bores and Keyways

Stock Reborable Taper Bushings With No Keyways

Millimeter Bores and Keyways from ISO Std. R773. 1" = 25.4 millimeters

NOTE: For other metric bore sizes consult factory.

14, 16 5 2.3

1008 1108 12101215 1610 1615

18, 196 2.8

1008 1108 1210 121520, 22 1610 1615 2012 2517

24

8 3.3 1108 1210 1215

1610 1615 2012 2517

25 8 3.3 1210 1215 1610

1615 2012 2517

28, 30 8 3.3 1210 1215 1610

1615 2012 2517 3020

32 10 3.3 1610 1615

2012 2517 3020

35 10 3.3 1610 1615

2012 2517 3020

38 10 3.3 1610 1615

2012 2517 3020

40, 42 12 3.3 2012

2517 3020

45, 48 14 3.820122517 3020

50 14 3.8 2517 302055 16 4.3 2517 3020

1008 916 1008 12 1008 12 1108 12 1108 12 1108

1210 916 1210 12 1210 12 1215 12 1215 12 1215

1310 12 1310 13101610 12 1516 1610 12 1610 12

1615 12 1516 1615 12 16152012 12 2012 12 2012 12

2517 12 1916 2517 12 2517 12 2525 218 2525 2525

3020 1516 11116 3020 1516 1716 21516 3020 1516 3020 1516 3030 1516 2716 21516 3030 3030

3535 1316 2716 21516 3535 35354040 1716 3716 31516 4040 4040

4545 31516 4716 4545 45455050 2716 31516

6050 3716 5716 7060 31516

8065 4716 10085 7

120100 8

Sintered Steel Gray Iron Steel Stainless Steel

Metric Metric

Bores Keyway

Taper Bushing Number

Not currently stocked. Consult factory for availability and pricing.



13/16

B-13

MST BushingsInstructions

MSTBushing

Size

Size ofCap Screw

WrenchTorquein. / lbs.

G

blind



14/16

B-14

MST Bushings

Dimensions Stock Bore Range Cap Screws Wrench

Part B Large Av. Wt. Torque No. D L A End G B.C. W Type 1 Type 2 No. Size Lbs. In. / lbs.

G 2.00 1.00 0.25 1.1720 0.19 1.56 3/8 - 15/16 1 2 1/4 5/8 0.5 95

H 2.50 1.25 0.25 1.6250 0.19 2.00 3/8 - 1-3/8 1-7/16 - 1-1/2 2 1/4 3/4 0.8 95

P1 3.00 1.94 0.41 1.9375 0.22 2.44 0.375 1/2 - 1-7/16 1-1/2 - 1-3/4 3 5/16 1 1.3 192

P2 3.00 2.94 0.41 1.9375 0.22 2.44 0.375 3/4 - 1-7/16 1-1/2 - 1-3/4 3 5/16 1 1.5 192

P3 3.00 4.44 0.41 1.9375 0.22 2.44 0.375 1-1/8 - 1-3/8 1-5/8 3 5/16 1 2.0 192

Q1 4.12 2.50 0.53 2.8750 0.22 3.38 0.500 3/4 - 2-1/16 2-1/8 - 2-11/16 3 3/8 1-1/4 3.5 348

Q2 4.12 3.50 0.53 2.8750 0.22 3.38 0.500 1 - 2-1/16 2-1/8 - 2-5/8 3 3/8 1-1/4 4.5 348

Q3 4.12 5.00 0.53 2.8750 0.22 3.38 0.500 1-3/8 - 2-1/16 2-1/8 - 2-1/2 3 3/8 1-1/4 5.5 348

R1 5.38 2.88 0.62 4.0000 0.25 4.62 0.750 1-1/8 - 2-13/16 2-7/8 - 3-3/4 3 3/8 1-3/4 7.5 348

R2 5.38 4.88 0.62 4.0000 0.25 4.62 0.750 1-3/8 - 2-13/16 2-7/8 - 3-5/8 3 3/8 1-3/4 11.0 348S1 6.38 4.38 0.75 4.6250 0.31 5.38 0.750 1-11/16 - 3-3/16 3-1/4 - 4-1/4 3 1/2 2-1/4 13.5 840

S2 6.38 6.75 0.75 4.6250 0.31 5.38 0.750 1-7/8 - 3-3/16 3-1/4 - 4-3/16 3 1/2 2-1/4 19.0 840

UO 8.38 5.25 1.06 6.0000 0.44 7.00 1.250 2-3/8 - 3-1/16 3 5/8 2-3/4 30.0 1680

UO 8.38 4.94 0.75 6.0000 0.44 7.00 1.250 3-1/4 - 4-1/4 4-3/8 - 5-1/2 3 5/8 2-3/4 27.0 1680

U1 8.38 7.12 1.06 6.0000 0.44 7.00 1.250 2-3/8 - 4-1/4 4-3/8 - 5-1/2 3 5/8 2-3/4 40.0 1680

U2 8.38 10.12 1.06 6.0000 0.44 7.00 1.250 2-7/16 - 4-1/4 4-3/8 - 5 3 5/8 2-3/4 50.0 1680

W1 12.50 8.25 1.44 8.5000 0.44 10.00 1.250 3-3/8 - 6-3/16 6-1/4 - 7-7/16 4 3/4 3 104.0 3000

W2 12.50 11.25 1.44 8.5000 0.44 10.00 1.250 3-3/8 - 6-3/16 6-1/4 - 7-7/16 4 3/4 3 133.0 3000

G & H BUSHINGS

S & U BUSHINGS

P, Q & R BUSHINGS

W BUSHINGS

R

S

UU1, U2

Bushing Specifications

All tapers are 3/4" per 12" on Diameter.

All dimensions are in inches except, as noted.

All bushings are cast iron, ductile iron, sintered steel, or steel. Consult manufacturer for clarication.

Metric bushings also available.



15/16

For Dimensions Tapped Holes Wt.

Part No. Bushing D L P L1 B K B.C. W ao No. Size Lbs.

HH1 H 2.50 0.88 2.375 0.174 1.6210 2.000 2 1/4 - 20 0.6

HCH1 H 2.50 0.88 2.375 0.625 1.6210 2.000 2 1/4 - 20 0.7

HP1 P1 3.00 1.31 2.875 0.292 1.9375 1.094 2.438 0.375 60 3 5/16 - 18 1.4

HCP1 P1 3.00 1.31 2.875 1.000 1.9375 1.094 2.438 0.375 60 3 5/16 - 18 1.1

HP2 P2 3.00 2.31 2.875 1.100 1.9375 1.094 2.438 0.375 60 3 5/16 - 18 2.5

HQ1 Q1 4.50 1.75 4.375 0.709 2.8750 1.562 3.375 0.500 60 3 3/8 - 16 4.4

HCQ1 Q1 4.50 1.75 4.375 1.250 2.8750 1.562 3.375 0.500 60 3 3/8 - 16 4.4

HQ2 Q2 4.50 2.75 4.375 1.606 2.8750 1.562 3.375 0.500 60 3 3/8 - 16 6.9

HR1 R1 5.75 2.00 5.625 0.709 4.0000 2.188 4.625 0.750 60 3 3/8 - 16 7.3 HR2 R2 5.75 4.00 5.625 1.606 4.0000 2.188 4.625 0.750 60 3 3/8 - 16 15.4

HS1 S1 6.75 3.31 6.500 0.946 4.6250 2.562 5.375 0.750 60 3 1/2 - 13 17.3

HS2 S2 6.75 5.69 6.500 2.963 4.6250 2.562 5.375 0.750 60 3 1/2 - 13 30.4

HU0 UO 8.50 3.75 8.250 2.000 6.0000 3.250 7.000 1.250 60 3 5/8 - 11 32.0

HU1 U1 8.50 5.62 8.250 2.963 6.0000 3.250 7.000 1.250 60 3 5/8 - 11 44.6

HU2 U2 8.50 8.62 8.250 6.016 6.0000 3.250 7.000 1.250 60 3 5/8 - 11 69.0

HW1 W1 12.50 6.38 12.250 2.963 8.5000 4.562 10.000 1.250 22.5 4 3/4 -10 130.0

B-15

MST Weld-On Hubs

H HUBS

B.C.

B.C.

B.C.

W HUBS

P, Q, R, S, Y U HUBS

ALL TAPERS 3/4" PER FT.

ON DIAMETER

All tapers are 3/4" per 12" on Diameter.

All dimensions are in inches, except as noted.

Steel Hub Specifications



16/16

B-16

QD & MST

Idler Bushings

SH-BB 716 1.871 21116 34 58 1516 1516 1516 716 3116

SD-BB 12 2.187 3316 114 1116 1116 11316 1916 58 378

SK-BB 916 2.812 378 114 34 1316 11516 134 34 4916

SF-BB 916 3.125 458 114 34 1516 2116 218 78 5

E-BB 34 3.834 6 158 1716 2316 258 3316 138 678

H-BB 1/2 14 1.625 212 1 38 1116 114 1 12 2916

P1-BB 5/8 1332 1.937 3 11732 1732 5964 11516 1516 58 34164

Q1-BB 3/4 1732 2.875 418 11516 516 2532 212 114 34 4732

Q1-BB 1 1732 2.875 418 11516 932 5764 212 112 1 43964

MartinIdler Bushings are designed to accomodate stock V-belt drives, sprock-ets, timing belt pulleys, or other products that use QD or MST type bushings.

They are equipped with two electric motor grade, permanently lubricated ball

bearings, mounted on a precision shoulder bolt. Shoulder bolt and two hex jam

nuts are zinc plated.

Installation is made by slipping the threaded shaft through a hole bored in sup-

port structure, and tightening the locking nut. Sheaves, sprockets, or other

products can be removed without dismounting the idler bushing. Available in

sizes as shown below. Boxed complete with all mounting hardware and instruc-

tions.

QD Radial Load Ratings (Lbs.)2500 Hours Service Life

Service Temperature Range 40 F Minimum +248 F Maximum.

SH-BB 1260 740 580 540 480

SD-BB 1740 1020 800 760 660

SK-BB 2370 1360 1070 1000 880

SF-BB 2550 1500 1180 1100 980

E-BB 4640 2720 2140 2020 1780

Part RPM

Number 100 500 1000 1200 1800

Part Dimensions

Number A B D F H J L M N OL

Taper 34" per foot on diameter.

D

B

FA

M

J

H

N

L

OL

MST Radial Load Ratings (Lbs.)2500 Hours Service Life

Service Temperature Range 40 F Minimum +248 F Maximum.

H-BB 1/2 1411 825 655 616 538

P1-BB 5/8 1752 1024 813 765 668

Q1-BB 3/4 2344 1371 1088 1024 894

Q1-BB 1 2555 1494 1186 1116 975

Part RPM

Number 100 500 1000 1200 1800

Taper 34" per foot on diameter.


SECTION B Sprocket

Documents

Transcript of SECTION B Sprocket