Product News: Mechanical Power Transmission

Planetary Gearheads with low backlash.

Press Release Summary:

Planetary Gearheads with low backlash.

Sep 04, 2014 - Utilizing helical gears for quiet performance, HPN Planetary Gearheads couple to any servo motor with Quick-Connect™ coupling. Units are available in 5 sizes of 11, 14, 20, 32, and 40 with reduction ratios from 3:1 to 31:1 Backlash is less than 5 arc-min for 1-stage and less than 7 arc-min for 2-stage. With peak torque from 9–752 N∙m, gearheads provide precision motion control and positioning in defense, robotics, medical, aerospace, and machine tool applications.

Harmonic Drive LLC - Peabody, MA

Original Press Release

Harmonic Drive LLC Introduces Value Series Planetary Gearheads with Affordable Pricing with Short Lead Times

Press release date: Aug 29, 2014

Peabody, MA,  – Harmonic Drive LLC, a leader in high precision motion control introduces the HPN Harmonic Planetary® Gearheads.  HPN planetary gearheads deliver affordable precision.

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. This new value series of planetary gears carry 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 positioning. HPN Harmonic Planetary® gears are available in 5 sizes: 11, 14, 20, 32, and 40, with reduction ratios ranging from 3:1 to 31:1.

HPN Key Features :
Peak Torque 9 N∙m to 752 N∙m
Robust design
High precision
Backlash <5 arc-min (One stage) , < 7 arc-min (Two stage)
Quick-Connect design for easy mounting to a wide variety of servomotors
Reduction ratio 3:1 – 10:1 (One stage), 13:1-31:1 (Two stage) 
Helical gears for quiet performance
Quick delivery

Known for its expert engineering and manufacturing, Harmonic Drive LLC products are relied upon every day throughout the motion control industry. The majority of the products sold by HDLLC are proudly made at their US headquarters and manufacturing facility in Massachusetts.

APPLICATIONS for Harmonic Drive products:
Defense: Unmanned Vehicles, Remote Weapon Stations, Antenna Pointing
Robotics: Industrial, Semiconductor & Flat Panel, Humanoid, Mobile Robots
Medical: Surgical Robots, Medical Imaging, Therapeutic, Prosthetics, Exoskeletons, Lab Automation
Aerospace: Solar Array Drives, Antenna Pointing, Valve Actuators, Lunar and Interplanetary Rovers
Machine Tool: Milling Head, Tool Changer, Rotary Table, Grinding, B & C Axis
Energy: oil exploration, drilling and positioning, wind power, solar

KEY PERFORMANCE features for Harmonic Drive® servo actuators, gearheads and component sets:
True Zero Backlash
Excellent positional accuracy and repeatability
High Torque-to-Weight and Torque-to-Volume ratios
Compact size
High Reliability
Single stage high reduction ratio

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. Affiliated companies in, Japan (Harmonic Drive Systems, Inc.) and Germany (Harmonic Drive AG) provide additional manufacturing capabilities. More information can be found by visiting the company’s web site at

Colleen Anderson, Marketing Manager
Harmonic Drive LLC