CSF supermini Series / Unit / Ultra-compact Type


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.

*Product images are for reference purposes.


  1. Model: CSF series
  2. Model No.: 3
  3. Version symbol: B (Latest version)
  4. Velocity ratio: 30, 50,100
  5. Models:
    • 1U = Unit type
    • 1U-CC = Gear head type Shaft output
  6. Special specification:
    • No description = Standard product
    • SP = Special specification


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Catalog Series Catalog name Japanese English Traditional Chinese
HarmonicDrive® Reducer for precision control General catalog of HarmonicDrive® 2403-26R 2308-25R 2308-25R
CSF supermini/CSF-mini・FHA-C mini・RSF supermini Compact Variation 1906-2R 1906-2R

Manual / Software

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Manual/Software Type/Series Material name/software name Detailed information English
Manual HarmonicDrive® Speed Reducer HarmonicDrive® Engineering Data
Manual CSF-3 Series Speed Reducer HarmonicDrive® for Precision Control CSF-3 Series Speed Reducer Manual

Related products

A product that provides the compact models of Harmonic Drive® (#5 to #14) as a unit. It adopts our unique 4-point contact ball bearing as the main roller bearing to enable direct support of external loads. Select from a range of shapes for different installation methods.
The standard Harmonic Drive® model. The components of this unit product have been made easier to handle. It includes an accurate high stiffness cross roller bearing in the main roller bearing to enable direct support of external loads.


If you have any comments about this product, please contact us using the inquiry form or the nearest sales office.

The academic and general name of "Harmonic Drive®" is "Strain Wave Gearing", and the name "Harmonic Drive®" is a registered trademark that can only be used for products manufactured and sold by the Company.

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