Harmonic Drive LLC Product

Right Angle Planetary Gearbox

Model: HPN-RA

Harmonic Drive LLC

Image of Right Angle Planetary Gearbox

HPN Value Series

HPN Harmonic Planetary® value series is now available in a right angle configuration. HPN provides a low cost solution without the need to compromise on quality or performance. The HPN Series features helical gears for High –Torque, quiet performance and long life. Backlash of <6 arc minutes (for single stage) is maintained for the life of the gear. Large radial ball bearings support the output shaft for high load capacity. HPN Harmonic Planetary® gears are available with a smooth output shaft or a shaft with a key and tapped center hole. The HPN gearheads are available with short lead times and are designed to couple to any servo motor with our Quick Connect® mounting system. This new value series of planetary gears carry the reputation for quality and reliability for which Harmonic Drive® products are known throughout the world.

  • Spiral bevel right angle gear set with planetary output
  • Helical Gearing
  • Available in 5 Frame Sizes
  • Peak torque: 9Nm to 752Nm
  • Ratios, 3:1 to 50:1
  • High Efficiency
  • Backlash <6 arc-min (single stage) ,<9 arc-min (two stage)
  • Grease lubricated for life
  • Competitive price levels with short lead times
  • Shaft output available with key and center tapped hole or with center tapped hole

About Harmonic Drive LLC
Harmonic Drive LLC engineers and manufactures precision Harmonic Drive® servo actuators, gearheads and gear component sets.  They work with industry-leading customers and companies of all sizes to provide both standard product and custom-engineered servo actuators, gearheads and gear components. Harmonic Drive LLC provides high precision, high performance solutions to meet customer’s mission critical application requirements. The majority of the products sold by HDLLC are proudly made at their US headquarters and manufacturing facility in Massachusetts. Harmonic Drive LLC is AS9100 and ISO 9001 registered. Affiliated companies in, Japan (Harmonic Drive Systems, Inc.) and Germany (Harmonic Drive SE) provide additional manufacturing capabilities. 


With over 50 years of experience, our expert engineering and production teams develop enabling technologies and products to meet the needs of an evolving motion control market. We are very proud of our outstanding company history. Our high-precision, zero-backlash Harmonic Drive® gears and Harmonic Planetary® gears have, and continue to play critical roles in robotics, spaceflight applications, semiconductor manufacturing equipment, factory automation equipment, medical diagnostics and surgical robotics.


Harmonic Drive is a registered trademark of Harmonic Drive Systems.

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