The Tsubaki RS15 Type 1B sprocket is a miniature sprocket for RS15 chain, one of the smallest standard roller chain sizes with a 4.7625mm pitch. A small hub on one side allows set-screw fixing to the shaft. It is used in office equipment, vending machines, small instruments and compact mechanisms where a light, precise chain drive is needed.
| Part No. |
Material |
Shape |
No. of Teeth |
Bore Type |
Chain Pitch (mm) |
Tooth Width (mm) |
Type |
Type |
No. of Strands |
Pitch Diameter (Dp) (Ømm) |
Outer Diameter (Do) (Ømm) |
Roller Diameter (Ømm) |
| RS15-1B11T |
Carbon steel for machine structural use, machined specification |
1B |
11 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
16.9 |
19 |
2.48 |
| RS15-1B12T |
Carbon steel for machine structural use, machined specification |
1B |
12 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
18.4 |
20.5 |
2.48 |
| RS15-1B13T |
Carbon steel for machine structural use, machined specification |
1B |
13 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
19.9 |
22 |
2.48 |
| RS15-1B14T |
Carbon steel for machine structural use, machined specification |
1B |
14 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
21.4 |
23.5 |
2.48 |
| RS15-1B15T |
Carbon steel for machine structural use, machined specification |
1B |
15 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
22.91 |
25 |
2.48 |
| RS15-1B16T |
Carbon steel for machine structural use, machined specification |
1B |
16 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
24.41 |
26.5 |
2.48 |
| RS15-1B17T |
Carbon steel for machine structural use, machined specification |
1B |
17 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
25.92 |
28 |
2.48 |
| RS15-1B18T |
Carbon steel for machine structural use, machined specification |
1B |
18 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
27.43 |
29.5 |
2.48 |
| RS15-1B19T |
Carbon steel for machine structural use, machined specification |
1B |
19 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
28.93 |
31 |
2.48 |
| RS15-1B20T |
Carbon steel for machine structural use, machined specification |
1B |
20 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
30.44 |
32.5 |
2.48 |
| RS15-1B21T |
Carbon steel for machine structural use, machined specification |
1B |
21 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
31.95 |
34 |
2.48 |
| RS15-1B22T |
Carbon steel for machine structural use, machined specification |
1B |
22 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
33.46 |
35.5 |
2.48 |
| RS15-1B23T |
Carbon steel for machine structural use, machined specification |
1B |
23 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
34.98 |
37.5 |
2.48 |
| RS15-1B24T |
Carbon steel for machine structural use, machined specification |
1B |
24 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
36.49 |
39 |
2.48 |
| RS15-1B25T |
Carbon steel for machine structural use, machined specification |
1B |
25 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
38 |
40.5 |
2.48 |
| RS15-1B26T |
Carbon steel for machine structural use, machined specification |
1B |
26 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
39.51 |
42 |
2.48 |
| RS15-1B27T |
Carbon steel for machine structural use, machined specification |
1B |
27 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
41.02 |
43.5 |
2.48 |
| RS15-1B28T |
Carbon steel for machine structural use, machined specification |
1B |
28 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
42.54 |
45 |
2.48 |
| RS15-1B29T |
Carbon steel for machine structural use, machined specification |
1B |
29 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
44.05 |
46.5 |
2.48 |
| RS15-1B30T |
Carbon steel for machine structural use, machined specification |
1B |
30 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
45.56 |
48 |
2.48 |
| RS15-1B31T |
Carbon steel for machine structural use, machined specification |
1B |
31 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
47.08 |
49.5 |
2.48 |
| RS15-1B32T |
Carbon steel for machine structural use, machined specification |
1B |
32 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
48.59 |
51 |
2.48 |
| RS15-1B33T |
Carbon steel for machine structural use, machined specification |
1B |
33 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
50.1 |
52.5 |
2.48 |
| RS15-1B34T |
Carbon steel for machine structural use, machined specification |
1B |
34 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
51.62 |
54 |
2.48 |
| RS15-1B35T |
Carbon steel for machine structural use, machined specification |
1B |
35 |
Pilot bore type |
4.7625 |
2 |
Standard product |
Sprocket |
1 |
53.13 |
55.5 |
2.48 |
Check the number of teeth and the bore size, and confirm the shaft fixing method. Please confirm the full part number and options against the TSUBAKI catalog; contact us if you need help identifying the right model.
Tsubakimoto Chain Co. (TSUBAKI) is a Japanese manufacturer and one of the world's leading makers of power transmission products, including roller and conveyor chains, sprockets, timing belts and pulleys, Power-Lock keyless locking devices, couplings, cam clutches, reducers and cable carriers.