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HarmonicDrive® Speed Reducer for Precision Control Speed Reducer CSF supermini Series Gear Head Type


  • The world's smallest HarmonicDrive®
  • Ultra-small and lightweight speed reducer unit
  • 4-point contact ball bearing available
  • Backlash-free

The CSF supermini Series Gear Head Type is the world's smallest HarmonicDrive® that saves even more space.
It is engineered ultra small with attributes such as non-backlash, high positioning and high rotational accuracy.
You can select the motor direct connection type and conclusive type for the input shaft specification.

Commercial Applications



  1. Model: CSF series
  2. Model No.: 3
  3. Version symbol: B (Latest version)
  4. Velocity ratio: 30, 50,100
  5. Model: 1U-CC = Gear head type Shaft output
  6. Special specification (SP is not affixed on standard products)

Rated Table

Catalog Downloads (opens to a new window)

Model No. Reduction ratio Rated torque at 2000 r/min input Permissible peak torque at start and stop Permissible maximum value for average load torque Permissible maximum momentary torque Permissible maximum input rotational speed (Grease lubricant) CAD data

Cover image

N·m N·m N·m N·m r/min  
3 30 0.06 0.13 0.1 0.22 10000 DXF file
50 0.11 0.21 0.13 0.41
100 0.15 0.3 0.23 0.57

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