Products Power Transmission Products

  • Sprockets for Drive Chains

Other Special Sprockets

A line-up of special sprockets is also available.

We offer sprockets for BS/DIN Series chain and torque limiters to meet customer needs.

Other Special Sprockets
Sprockets for BS chain
Standard BS/DIN products (available chain sizes: RF06B to RS16B)
Sprockets for Torque Limiters
Sprockets whose center member friction face has been finished (available chain sizes: RS40 to RS100).

1. Sprockets for BS chain

Sprockets for BS chain

BS standard (European standard) roller chains requires special BS sprockets (RS sprockets/JIS standards cannot be used due to a different number of teeth and outer diameter).

Sizes, hardened teeth specifications, and bore finishings not shown in the dimensional chart are also available on an MTO basis. Contact a Tsubaki representative for more information.

Dimensions/Specifications

Select the sprocket number for detailed information.

Chain Size
RF06B RF08B RF10B RF12B RF16B

2. Torque Limiter Sprockets

Torque Limiter Sprockets

Torque limiters are typical mechanical devices for overload protection, and such it is essential that the friction surface of their center member be finished properly to ensure the precise, accurate overload detection of the torque limiter.

Sprockets for torque limiters are provided with special surface finishing to realize the ideal surface finish.

3. Reference Number System

RS40 - 1A 20T - CM 30
(1) (2) (3) (4) (5)
  1. (1) Chain numbers
  2. (2) Other size and hub types
  3. (3) No. of teeth
  4. (4) Torque Limiter Sprocket
  5. (5) Finished bore diameter: d

Chain No. RS40 RS50 RS60 RS80 RS100
W 6.5 8.0 10.5 13.5 16.5
t 7.3 8.9 11.9 15.0 18.0
  • Usage conditions: Sprocket width > Torque limiter bush width (The sprocket width must be larger than the bush width.)
  • All other dimensions are the same as those for standard 1A Type sprockets.
  • Refer to the torque limiter compatibility table for the d and Dw ranges.
  • Uses an H7 finished bore diameterd.
  • Be sure to check the torque limiter catalog for each dimension.
  • Specify the model number of the torque limiter when placing your order.。

Torque limiter compatibility table

Available sprocket range dxDw

RS40

No. of teeth 16 17 18 19 20 21 22 23 24 25 26 27 28 30 32 34 35 36 38 40 42 45 48 50
TL200 30x53
TL250 41x68
TL350 49x92

RS50

No. of teeth 16 17 18 19 20 21 22 23 24 25 26 27 28 30 32 34 35 36 38 40 42 45 48 50
TL250 41x68
TL350 49x92
TL500 74x134

RS60

No. of teeth 16 17 18 19 20 21 22 23 24 25 26 27 28 30 32 34 35 36 38 40 42 45 48 50
TL350 49x92
TL500 74x134
TL700 105x184

RS80

No. of teeth 16 17 18 19 20 21 22 23 24 25 26 27 28 30 32 34 35 36 38 40 42 45 48 50
TL500 74x132
TL700 105x184

RS100

No. of teeth 16 17 18 19 20 21 22 23 24 25 26 27 28 30 32 34 35 36 38 40 42 45 48 50
TL500 74x132
TL700 105x184
  • Check the bush width if TL230 or TL350 are used with RS40 sprockets.
  • Sprockets compatible with torque limiters are available. We also offer made-to-order sprockets.