HPG-RA Series / Gear Head Planetary Speed Reducer / Linear Shaft Type


The HarmonicPlanetary® HPG series right angle gear head type is a planetary speed reducer for a high accuracy and high stiffness servo motor.

- Installation motor capacity: 850W to 7500W

*Click here for Online HarmonicGearhead® Selection tool.

*Product images and CAD images are for reference purposes.
  See here for form details


  1. Model: HPG series
  2. Model Nos: 32, 50, 65
  3. Version symbol
  4. Reduction ratio:
    • Model No. 32 = 5, 11, 15, 21, 33, 45
    • Model No. 50 = 5, 11, 15, 21, 33, 45
    • Model No. 65 = 5, 12, 15, 20, 25, 40, 50
  5. Output shaft shape:
    • F0 = Flange output
    • J2 = Straight shaft (key-less)
    • J6 = Straight shaft (Key center, tapped)
    • (The shaft output of model No.65 is special specifications)
  6. Form symbol on the input side:
    • 3 to 4 digit alphabet letters
    • Motor flange and input shaft joint form symbols (will vary depending on the motor mounted)
    • (will vary depending on the motor mounted)
    • Check using the matching tool
  7. Right angle part model (Right angle unit part form symbol)
    • Refer to the motor matching table in the catalog.
  8. Special specification:
    • No description = Standard product
    • SP = Special specification


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Catalog Series Catalog name Japanese English Traditional Chinese
High-performance Gear Heads series High-performance Gear Heads for Servo Motors series 2403-16R 2403-16R 2403-16R

Related products

The standard planetary speed reducer Harmonic Planetary® model. This high accuracy planetary speed reducer has a back lash of three minutes or less with standard specifications and one minute or less with precision specifications.
The HPG-R Series is a high end model that achieves both a quiet design and an approximately 30% torque increase over the HPG Series via the adoption of a helical gear.
The HPG-U1 Series is the HPG Series unit with an input shaft. It can be used for connections including belts, pulley inputs, gears, spline inputs.


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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