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Roller Chain Sprocket

Roller Chain Sprocket

The Martin double, also known as a duplex, type B sprocket is suitable for use with the series 80-2 chain with 1” pitch for driver or driven sprocket applications. Varying numbers of teeth and pitch diameters offer application flexibility. Made from high carbon steel, it has high strength and durability. Multiple chain capability allows for more power at higher operational speeds with greater load capacity.

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roller chain sprocket


For use with 80-2 chain, 1" pitch for driver or driven sprocket applications

Double type B sprocket offers a stable and secure attachment to the shaft, and can be modified to suit a wide variety of applications requiring two chains

Shaft diameter options range from 1 to 1-1/2" for a variety of applications

Varying numbers of teeth and pitch diameter sizes offer application flexibility

High carbon steel for strength and durability


The Martin double, also known as a duplex, type B sprocket is suitable for use with the series 80-2 chain with 1” pitch for driver or driven sprocket applications. Varying numbers of teeth and pitch diameters offer application flexibility. Made from high carbon steel, it has high strength and durability. Multiple chain capability allows for more power at higher operational speeds with greater load capacity.


roller chain sprocket

  • With Keyway

Without Keyway


For ANSI 25 Roller Chain (1/4" Pitch)

Number
of Teeth
For Shaft
Dia.
OD Overall
Wd.
Hub Dia. Wd. Dp. Material Includes
9 1/4" 0.84" 1/2" 7/16" __ __ Steel Two Set Screws 2737T1
10 1/4" 0.92" 1/2" 1/2" __ __ Steel Two Set Screws 2737T2
11 1/4" 1" 1/2" 9/16" __ __ Steel Two Set Screws 2737T3
12 1/4" 1.08" 1/2" 5/8" __ __ Steel Two Set Screws 2737T101
12 3/8" 1.08" 1/2" 5/8" __ __ Steel Two Set Screws 2737T102
13 1/4" 1.17" 1/2" 23/32" __ __ Steel Two Set Screws 2737T103
13 3/8" 1.17" 1/2" 23/32" __ __ Steel Two Set Screws 2737T104
14 1/4" 1.25" 1/2" 13/16" __ __ Steel Two Set Screws 2737T105
14 3/8" 1.25" 1/2" 13/16" __ __ Steel Two Set Screws 2737T106
14 1/2" 1.25" 1/2" 13/16" __ __ Steel Two Set Screws 2737T107
15 1/4" 1.33" 1/2" 57/64" __ __ Steel Two Set Screws 2737T108
15 3/8" 1.33" 1/2" 57/64" __ __ Steel Two Set Screws 2737T109
15 1/2" 1.33" 1/2" 57/64" __ __ Steel Two Set Screws 2737T111
16 1/4" 1.41" 1/2" 31/32" __ __ Steel Two Set Screws 2737T112
16 3/8" 1.41" 1/2" 31/32" __ __ Steel Two Set Screws 2737T113
16 1/2" 1.41" 1/2" 31/32" __ __ Steel Two Set Screws 2737T114
17 1/4" 1.49" 1/2" 1 1/32" __ __ Steel Two Set Screws 2737T115
17 3/8" 1.49" 1/2" 1 1/32" __ __ Steel Two Set Screws 2737T116
17 1/2" 1.49" 1/2" 1 1/32" __ __ Steel Two Set Screws 2737T117
17 5/8" 1.49" 1/2" 1 1/32" 3/16" 3/32" Steel Two Set Screws 2737T118
18 1/4" 1.57" 1/2" 1 1/8" __ __ Steel Two Set Screws 2737T119
18 3/8" 1.57" 1/2" 1 1/8" __ __ Steel Two Set Screws 2737T121
18 1/2" 1.57" 1/2" 1 1/8" __ __ Steel Two Set Screws 2737T122
18 5/8" 1.57" 1/2" 1 1/8" 3/16" 3/32" Steel Two Set Screws 2737T123
18 3/4" 1.57" 1/2" 1 1/8" 3/16" 3/32" Steel Two Set Screws 2737T124
19 1/4" 1.65" 1/2" 1 7/32" __ __ Steel Two Set Screws 2737T125
19 3/8" 1.65" 1/2" 1 7/32" __ __ Steel Two Set Screws 2737T126
19 1/2" 1.65" 1/2" 1 7/32" __ __ Steel Two Set Screws 2737T127
19 5/8" 1.65" 1/2" 1 7/32" 3/16" 3/32" Steel Two Set Screws 2737T128
19 3/4" 1.65" 1/2" 1 7/32" 3/16" 3/32" Steel Two Set Screws 2737T129
20 1/4" 1.73" 5/8" 1 9/32" __ __ Steel Two Set Screws 2737T131
20 3/8" 1.73" 5/8" 1 9/32" __ __ Steel Two Set Screws 2737T132
20 1/2" 1.73" 5/8" 1 9/32" __ __ Steel Two Set Screws 2737T133
20 5/8" 1.73" 5/8" 1 9/32" 3/16" 3/32" Steel Two Set Screws 2737T134
20 3/4" 1.73" 5/8" 1 9/32" 3/16" 3/32" Steel Two Set Screws 2737T135
20 7/8" 1.73" 5/8" 1 9/32" 3/16" 3/32" Steel Two Set Screws 2737T136
21 1/4" 1.81" 5/8" 1 3/8" __ __ Steel Two Set Screws 2737T137
21 3/8" 1.81" 5/8" 1 3/8" __ __ Steel Two Set Screws 2737T138
21 1/2" 1.81" 5/8" 1 3/8" __ __ Steel Two Set Screws 2737T139
21 5/8" 1.81" 5/8" 1 3/8" 3/16" 3/32" Steel Two Set Screws 2737T141
21 3/4" 1.81" 5/8" 1 3/8" 3/16" 3/32" Steel Two Set Screws 2737T142
21 7/8" 1.81" 5/8" 1 3/8" 3/16" 3/32" Steel Two Set Screws 2737T143
22 1/4" 1.89" 5/8" 1 7/16" __ __ Steel Two Set Screws 2737T144
22 3/8" 1.89" 5/8" 1 7/16" __ __ Steel Two Set Screws 2737T145
22 1/2" 1.89" 5/8" 1 7/16" __ __ Steel Two Set Screws 2737T146
22 5/8" 1.89" 5/8" 1 7/16" 3/16" 3/32" Steel Two Set Screws 2737T147
22 3/4" 1.89" 5/8" 1 7/16" 3/16" 3/32" Steel Two Set Screws 2737T148
22 7/8" 1.89" 5/8" 1 7/16" 3/16" 3/32" Steel Two Set Screws 2737T149
23 1/4" 1.97" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T151
23 3/8" 1.97" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T152
23 1/2" 1.97" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T153
23 5/8" 1.97" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T154
23 3/4" 1.97" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T155
23 7/8" 1.97" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T156
23 1" 1.97" 5/8" 1 1/2" 1/4" 1/8" Steel Two Set Screws 2737T157
24 3/8" 2.05" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T171
24 1/2" 2.05" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T172
24 5/8" 2.05" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T173
24 3/4" 2.05" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T174
24 7/8" 2.05" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T175
24 1" 2.05" 5/8" 1 1/2" 1/4" 1/8" Steel Two Set Screws 2737T176
25 3/8" 2.13" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T181
25 1/2" 2.13" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T182
25 5/8" 2.13" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T183
25 3/4" 2.13" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T184
25 7/8" 2.13" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T185
25 1" 2.13" 5/8" 1 1/2" 1/4" 1/8" Steel Two Set Screws 2737T186
26 3/8" 2.21" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T191
26 1/2" 2.21" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T192
26 5/8" 2.21" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T193
26 3/4" 2.21" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T194
26 7/8" 2.21" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T195
26 1" 2.21" 5/8" 1 1/2" 1/4" 1/8" Steel Two Set Screws 2737T196
28 3/8" 2.37" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T211
28 1/2" 2.37" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T212
28 5/8" 2.37" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T213
28 3/4" 2.37" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T214
28 7/8" 2.37" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T215
28 1" 2.37" 5/8" 1 1/2" 1/4" 1/8" Steel Two Set Screws 2737T216
30 3/8" 2.53" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T221
30 1/2" 2.53" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T222
30 5/8" 2.53" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T223
30 3/4" 2.53" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T224
30 7/8" 2.53" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T225
30 1" 2.53" 5/8" 1 1/2" 1/4" 1/8" Steel Two Set Screws 2737T226
32 3/8" 2.69" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T231
32 1/2" 2.69" 5/8" 1 1/2" __ __ Steel Two Set Screws 2737T232
32 5/8" 2.69" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T233
32 3/4" 2.69" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T234
32 7/8" 2.69" 5/8" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T235
32 1" 2.69" 5/8" 1 1/2" 1/4" 1/8" Steel Two Set Screws 2737T236
36 3/8" 3.01" 3/4" 1 1/2" __ __ Steel Two Set Screws 2737T261
36 1/2" 3.01" 3/4" 1 1/2" __ __ Steel Two Set Screws 2737T262
36 5/8" 3.01" 3/4" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T263
36 3/4" 3.01" 3/4" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T264
36 7/8" 3.01" 3/4" 1 1/2" 3/16" 3/32" Steel Two Set Screws 2737T265
36 1" 3.01" 3/4" 1 1/2" 1/4" 1/8" Steel Two Set Screws 2737T266
40 1/2" 3.33" 3/4" 2" __ __ Steel Two Set Screws 2737T281
40 5/8" 3.33" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T282
40 3/4" 3.33" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T283
40 7/8" 3.33" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T284
40 1" 3.33" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T285
40 1 1/4" 3.33" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T286
40 1 3/8" 3.33" 3/4" 2" 5/16" 5/32" Steel Two Set Screws 2737T287
45 1/2" 3.73" 3/4" 2" __ __ Steel Two Set Screws 2737T311
45 5/8" 3.73" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T312
45 3/4" 3.73" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T313
45 7/8" 3.73" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T314
45 1" 3.73" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T315
45 1 1/4" 3.73" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T316
45 1 3/8" 3.73" 3/4" 2" 5/16" 5/32" Steel Two Set Screws 2737T317
48 1/2" 3.96" 3/4" 2" __ __ Steel Two Set Screws 2737T321
48 5/8" 3.96" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T322
48 3/4" 3.96" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T323
48 7/8" 3.96" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T324
48 1" 3.96" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T325
48 1 1/4" 3.96" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T326
48 1 3/8" 3.96" 3/4" 2" 5/16" 5/32" Steel Two Set Screws 2737T327
54 1/2" 4.44" 3/4" 2" __ __ Steel Two Set Screws 2737T331
54 5/8" 4.44" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T332
54 3/4" 4.44" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T333
54 7/8" 4.44" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T334
54 1" 4.44" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T335
54 1 1/4" 4.44" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T336
54 1 3/8" 4.44" 3/4" 2" 5/16" 5/32" Steel Two Set Screws 2737T337
60 1/2" 4.92" 3/4" 2" __ __ Steel Two Set Screws 2737T341
60 5/8" 4.92" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T342
60 3/4" 4.92" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T343
60 7/8" 4.92" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T344
60 1" 4.92" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T345
60 1 1/4" 4.92" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T346
60 1 3/8" 4.92" 3/4" 2" 5/16" 5/32" Steel Two Set Screws 2737T347
70 1/2" 5.72" 3/4" 2" __ __ Steel Two Set Screws 2737T351
70 5/8" 5.72" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T352
70 3/4" 5.72" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T353
70 7/8" 5.72" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T354
70 1" 5.72" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T355
70 1 1/4" 5.72" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T356
70 1 3/8" 5.72" 3/4" 2" 5/16" 5/32" Steel Two Set Screws 2737T357
72 1/2" 5.88" 3/4" 2" __ __ Steel Two Set Screws 2737T361
72 5/8" 5.88" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T362
72 3/4" 5.88" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T363
72 7/8" 5.88" 3/4" 2" 3/16" 3/32" Steel Two Set Screws 2737T364
72 1" 5.88" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T365
72 1 1/4" 5.88" 3/4" 2" 1/4" 1/8" Steel Two Set Screws 2737T366
72 1 3/8" 5.88" 3/4" 2" 5/16" 5/32" Steel Two Set Screws 2737T367


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