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New Ultra-lightweight Gearhead Features High Accuracy and Zero Backlash

Press Release Summary:

  • CSF-ULW series is available with 30:1, 50:1 and 100:1 reduction ratios
  • Available with outer diameter of φ 42.5 mm and 50.5 mm
  • Ideal for use on end of arm axes for small industrial and collaborative robots

Original Press Release:

Ultra-lightweight Gear Units from Harmonic Drive LLC

New gear units boast ultra-thin profile and extreme lightweight.

Beverly, MA, August 14, 2020 -- Harmonic Drive LLC, a leader in high precision motion control introduces two new ultra-lightweight gearheads. The two models are the smallest and the first to be released in the CSF-ULW series.

This series features a newly engineered lightweight structure with an ultra-compact shape. The ULW line maintains the same performance specifications as the standard CSF-2UH series, but offers a 30% reduction in weight. Ideal for use on end of arm axes for small industrial and collaborative robots, the CSF-ULW is also well suited for general industrial machinery where weight is a critical factor. CSF-ULW gears are available with 3 reduction ratios; 30:1, 50:1 and 100:1.


  • Zero backlash
  • High accuracy
  • Ultra-lightweight
  • Super flat configuration, 19mm (size 8); 21.5mm (size 11)
  • Outer diameter: φ 42.5mm (size 8); 50.5mm (size 11)
  • Reduction Ratios 30:1~100:1

Known for its expert engineering and high-precision 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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