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HarmonicDrive® Speed Reducer for Precision Control CSF supermini Series Unit Type (Conclusive unit)


  • Ultra-small and lightweight speed reducer unit
  • 4-point contact ball bearing available
  • Backlash-free
  • External drawing: □13

The HarmonicDrive® CSF-3 series conclusive type comes equipped with the world's smallest 4-point contact ball bearing uniquely developed by us, and pushes compactness to new extremes

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 = Unit type
  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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