New HPN-RA Harmonic Planetary Gearheads are Suitable for Precision Motion Control and Servo Grade Positioning

Press Release Summary:

  • Available in 5 frame sizes: 11, 14, 20, 32, and 40 with reduction ratios ranging from 3:1 to 50:1
  • Feature robust design that utilizes helical gears for quiet performance and long life
  • Come with short lead times and are designed to couple to any servo motor with Quick-Connect coupling system

Original Press Release:

New Right-Angle Planetary Gearheads from Harmonic Drive LLC

HPN Planetary Gears offer affordable pricing with short lead times 

Beverly, MA, July 23, 2020 -- Harmonic Drive LLC, a leader in high precision motion control introduces the HPN-RA Harmonic Planetary® Gearheads. HPN-right angle helical planetary gearheads exhibit servo grade performance and deliver affordable precision in a compact right angle package.

HPN Planetary gearheads feature a robust design utilizing helical gears for quiet performance and long life. These gearheads are available with short lead times and are designed to couple to any servo motor with our Quick-Connect coupling system. This new right-angle configuration of our planetary gears carries the reputation for quality and reliability for which Harmonic Drive® products are known throughout the world. HPN gearheads are suitable for use in a wide range of applications for precision motion control and servo grade positioning. HPN-RA Harmonic Planetary® gears are available in 5 frame sizes: 11, 14, 20, 32, and 40 with reduction ratios ranging from 3:1 to 50:1.

HPN-RA Key Features: 

  • 90° angle configuration for tight space
  • Peak Torque 9 N∙m to 752 N∙m
  • Robust design
  • High precision
  • Backlash <6 arc-min (single stage) , < 9 arc-min (double stage)
  • Quick-Connect design for easy mounting to a wide variety of servomotors
  • Reduction ratio 3:1 – 10:1 (One stage), 15:1-50:1 (Two stage)
  • Helical gears for quiet performance
  • Quick delivery
  • Drop in replacement for popular industry dimensions

Known for its expert engineering and manufacturing, Harmonic Drive LLC products are relied upon every day throughout the motion control industry.

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. More information can be found by visiting the company’s website at

Harmonic Drive LLC Contact: Colleen Anderson, Marketing Manager / / 978-573-3427

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