HPGP Series / Gear Head Planetary Speed Reducer / High Torque Type


The HarmonicPlanetary® HPG series gear head type is a planetary speed reducer for servomotors featuring high accuracy and high stiffness.
Delivers approximately 33% more torque than the HPG series planetary gear speed reducer.

- Backlash standard of less than 3 arc min. (Special product: 1 arc min or less, Model HPGP-14A or later)

*Click here for Online HarmonicGearhead® Selection tool.

*Product images are for reference purposes.


  1. Model: HPGP series
  2. Model Nos.: 11, 14, 20, 32, 50, 65
  3. Version symbol
  4. Reduction ratio:
    • Model No. 11 = 5, 21, 37, 45
    • Model No. 14 = 5, 11, 15, 21, 33, 45
    • Model No. 20 = 5, 11, 15, 21, 33, 45
    • Model No. 32 = 5, 11, 15, 21, 33, 45
    • Model No. 50 = 5, 11, 15, 21, 33, 45
    • Model No. 65 = 4, 5, 12, 15, 20, 25
  5. Output shaft shape:
    • F0 = Flange output
    • J2 = Straight shaft (key-less) (No.11 is J20)
    • J6 = Straight shaft (Key center, tapped) (No.11 is J60)
    • (The shaft output of model No.65 is special specifications)
  6. Form symbol on the input side:
    • 3 to 6 digit alphabet letters
    • Motor flange and input shaft joint form symbols (will vary depending on the motor mounted)
    • Check using the matching tool
  7. Additional codes:
    • BL1 = Backlash of less than 1 arc-min., special specification (Model Nos.14-65)
    • D = Input side shield bearing is possible to change contact sealed type (DDU)
    • NR6 = Silent specification, backlash of less than 6 arc-min (Model Nos. 14-50)
  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 2209-15R 2209-15R

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-RA Series is a high accuracy right angle model that utilizes the features of the HPG Series.
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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