Posts Tagged 'Harmonic Drive'

Harmonic Drive LLC adds new two-stage Ratios to planetary servo gearheads

HPN Harmonic Planetary® Gearhead

HPN Harmonic Planetary® Gearhead

Peabody, MA –Harmonic Drive LLC, a leader in high precision motion control adds new two-stage ratios to its HPN Harmonic Planetary® gearhead line.  HPN planetary gears offer affordable pricing with short lead times.

New two stage ratios include 15:1, 20:1, 25:1, 35:1, 40:1, 45:1 and 50:1. With the addition of these ratios, the HPN line of planetary gearheads offer the increased design flexibility our customers require.

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® mounting system. HPN 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 Features:

  • Peak Torque 9 Nm to 752 Nm
  • Robust design
  • High precision
  • Backlash <5 arc-min (One stage), < 7 arc-min (Two stage)
  • Quick Connect® single bolt clamping design for easy mounting
  • Reduction ratio 3:1 – 10:1 (One stage), 15:1-50:1 (Two stage)
  • Helical gears for quiet performance
  • Quick delivery

This 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.

Click on the following link to view the HPN Catalog-

For more information, please contact:

Warren Osak
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699

Tags:  Harmonic Drive, HPN Gearhead, Planetary Gearbox, Planetary Gearhead

Harmonic Drive LLC introduces harmonic planetary gearheads

Harmonic Drive LLC, a leader in high precision motion control adds Harmonic Planetary HPG gearheads with helical gearing and low reduction ratios to its current planetary gearhead lineup.  Harmonic Gearhead products are available with quick lead times.Harmonic Drive HPG-R Gearbox

The new models, HPG-R, add low-speed ratios from 3:1 through 10:1 including all integer ratios in between.  HPG-R employs helical gearing for improved noise reduction and higher torque capacity.  Ideal for a variety of machinery and equipment designs, these new models enhance the already successful HPG series.

Harmonic Drive HPG-R GearboxA special design of the HPG internal gear allows a preload of the gear and enables it to slightly deform elastically thus maintaining low backlash for the life of the gearhead, without any need for adjustment.  This preload not only minimizes backlash but also compensates for interference between meshing parts.  The result is low backlash for the life of the gear, without any backlash creep.

Like all Harmonic Planetary gearheads, the HPG-Helical gears feature Quick Connect coupling for easy mounting to any servo motor.  They are also available with flange output, shaft output without key and shaft output with key and center tapped hole.

CLICK HERE for information on the Harmonic Drive HPG Harmonic Planetary Gearhead.

For more information, please contact:


Warren Osak
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699


Tags:  Harmonic Drive, Harmonic Planetary, Planetary Gearhead, Planetary Gearbox

Infinit-Indexer® Phase Adjusters from Harmonic Drive

Harmonic Drive Infinit-Indexer Phase Adjuster

Harmonic Drive Infinit-Indexer Phase Adjuster

HDI phase adjusters are available in 6 sizes with torque 500-20,000 in-lb.

They provide hand adjustable, precise, static phase adjustment. Adjustments can be made by hand in either direction by adjusting the knurled outer ring producing infinitely variable relative rotation of the hubs.

HDI Infinit-Indexer® phase adjusters are available from immediate stock in a variety of standard bore sizes with keyways, set screws, and tapped holes for face mounting of either hub.

Features include:

  • Phase Adjuster
  • Shaft Phasing Coupling
  • Adjust Ratio: 100:1
  • Available in 6 sizes
  • Torque: 500-20,000 in-lb

CLICK HERE for information on the Harmonic Drive Infinit-Indexer Phase Adjuster.

For more information, please contact:


Warren Osak
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699


Tags:  Harmonic Drive, Infinit-Indexer, Phase Adjuster

SHA-CG Hollow Shaft Actuators from Harmonic Drive LLC

Harmonic Drive LLC, a leader in high precision motion control introduces new actuators with surface run-out less than 10 microns. The SHA-CG  models are the newest offerings in the company’s Rotary Acutator product category.

Harmonic SHA-CG Actuator

Harmonic SHA-CG Actuator

The SHA-CG actuators feature a compact, hollow shaft configuration for design versatility in demanding applications. Ideal for machine tool applications, the SHA Series of brushless actuators provide high torque for fast acceleration and positioning. SHA-CG actuators are composed of a Harmonic Drive® CSG zero-backlash gear combined with a brushless servomotor with an encoder resolution at the output up to 20,971,520 pulse/rev.

The actuators are also available with an optional brake. Positional accuracy better than 1 arc-min and repeatability better than ±5 arc-sec is achieved while delivering up to 3,400 N m of torque. A robust cross-roller bearing allows mounting of large loads directly to the actuator without the need for additional support.

The SHA-CG has a Torque to Weight ratio as much as 8 times greater than comparable housed direct drive motors, and a Torque to Volume ratio as much as 6 times greater. This allows for a more compact and light-weight machine design.

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

SHA-CG Specifications:

  • High Accuracy:  Zero-backlash Harmonic Drive® gear reducer
  • Hollow Shaft diameter:   17-45mm
  • Available in 4 sizes, 20, 25, 32, 40
  • Maximum speed up to 120 rpm
  • Design: Compact, flat, hollow shaft

CLICK HERE for information on the SHA-CG Series from Harmonic Drive LLC.

For more information, please contact:


Warren Osak
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699


Tags:   Electromate, SHA-CG, Actuator, Brushless Actuator, Harmonic Drive

New Gearhead Selector Tool from Harmonic Drive®

Gearhead Selector Tool Snippet

New website features Harmonic Planetary® and Harmonic Drive® Quick Connect® gearheads (HPN, HPG, HPGP, CSF-GH, CSG-GH, HPF and HPG-U1).  Developed with the design engineer in mind, the new website features a robust product selector tool, PDF and DXF CAD drawings, as well as download-able 3-D solid models.  The Product Selector Tool enables the design engineer to quickly filter through Harmonic Drive product specifications to find the right gearhead to connect to their servomotor.


For more information, please contact:

Warren Osak
Toll Free Phone:   877-737-8698
Toll Free Fax:       877-737-8699

Tags:  Harmonic Drive, Harmonic Drive Gears, Actuators, Gearhead, Harmonic Drive Actuator, Harmonic Drive Gearing, Electromate, Strain Wave Gearing, Flex Spine, Circular Spine, Wave Generator, Planetary Gearbox, Harmonic Gearbox, Harmonic Gearhead

C. Walton Musser. The Inventor of Strain Wave Gearing

In 1955 C. Walton Musser invented the strain wave gear.  His precision reducer design includes only 3 parts, yet offers Zero Backlash, High Accuracy and High Torque to Weight Ratio and together with the USM Corporation perfected the mechanics of the strain wave gear, and commercialized it in 1960 forming the Harmonic Drive division of USM.  The Harmonic Drive division grew to become the Harmonic Drive Group Companies, the worldwide leader in motion control with 3 manufacturing facilities in Japan, USA and Germany serving local and global companies.

In this highly visual 5 minute YouTube Video, C. Walton Musser’s life and legacy is illustrated.

Click on the following links to view the Harmonic Drive Product Family-

Harmonic Drive Gearing Systems

Harmonic Drive Pancake Gearing Components


Tags:  Harmonic Drive, Strain Wave Gearing, Pancake Gearing, C. Walton Musser, Strain Wave Gear

Ultra-Flat, Zero-Backlash Gear by Harmonic Drive LLC

Ultra Flat Harmonic Drive Gearing

Ultra Flat Harmonic Drive Gearing

Harmonic Drive LLC, a leader in high precision motion control introduces new, ultra-flat, zero-backlash gear unit.  The CSF-2UP gear unit is the newest model in the CSF mini-series product line.

These new high-torque, zero-backlash gear units have an ultra-flat configuration and feature a large cross-roller bearing with high-moment stiffness.  Complete with a housing and precision output bearing, Harmonic Drive® gear units are lightweight and extremely compact.  The CSF-2UP gearheads are ideally suited for robots or manipulators requiring an ultra-compact solution.

Harmonic Drive® gear units are comprised of a zero-backlash gear integrated with a housing and precision output bearing.  These new models are very lightweight and extremely flat.  Utilizing a large cross-roller bearing at the output flange allows direct mounting of the load without the need for any additional support, enabling compact robot designs.  These bearings have excellent axial and radial run-out characteristics and provide high load capacity as well as high-moment stiffness to achieve precise, repeatable positioning of the robot arm.

Gear Ratios of 30:1, 50:1, and 100:1 are available in each size, offering the machine designer a wide selection of speed and torque specifications.  Motor mounting adapters are also available to match the designer’s choice of motor.

Like all Harmonic Drive® gear units, the CSF-2UP mini gears are highly reliable and maintain zero backlash for the life of the gear.

Features include:

  • Zero Backlash
  • New Ultra Flat Configuration​
  • High Positioning Accuracy
  • Compact Form Factor​
  • High-moment stiffness cross roller bearing
  • Motor mounting flange available

As the trend towards developing more compact robots gains momentum, these Harmonic Drive® units are uniquely positioned to provide designers the affordability and flexibility to meet the increasing demands and performance expectations posed by the robotics industry.


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