HARDWARE / PRODUCTAdded 23 Aug 2026

RSF Actuator

Harmonic Drive
RSF Actuator

The RSF series servo actuator combines a high performance brushless servomotor with a high accuracy Harmonic Drive® gearhead, delivering precise, reliable motion control for high torque and long life applications.

Key figurescomparable across the catalogue

Mass
2.1 kg

Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.

As published by the supplier

Rated Output (RSF-17A, Ratio 50)
62 W
Rated Output (RSF-17A, Ratio 100)
62 W
Rated Torque (RSF-17A, Ratio 50)
9.8 Nm
Rated Torque (RSF-17A, Ratio 100)
20 Nm
Rated Rotational Speed (RSF-17A, Ratio 50)
60 rpm
Rated Rotational Speed (RSF-17A, Ratio 100)
30 rpm
Mass (RSF-17A)
2.1 Kg
Mass (RSF-20A)
2.9 Kg
Mass (RSF-25A)
4.7 Kg
Mass (RSF-32A)
8.7 Kg
One-way Positioning accuracy (RSF-17A)
120 arc/sec
One-way Positioning accuracy (RSF-20A, 25A, 32A)
90 arc/sec

About

The RSF series servo actuator integrates a high-performance brushless servomotor with a high-accuracy Harmonic Drive® gearhead. This combination, when paired with a performance-matched servo drive, provides precise and reliable motion control for machinery demanding both high torque and extended operational life. The RSF Series is engineered for compatibility with a wide array of third-party drives, as well as Harmonic Drive LLC’s proprietary RTL Series and REL Series. Key features of the RSF Actuator include zero backlash, a compact and lightweight design, high torque capabilities, and an accuracy of less than 1 arc-minute. The product is available in various sizes (17, 20, 25, 32) and reduction ratios (50, 100), with options for incremental encoders and resolutions up to 2000 p/rev.

Documentation

Need the full ICD, test reports or a specific revision? Ask the supplier directly.

Source: www.harmonicdrive.net ↗

The rest of the range from Harmonic Drive

All 58 products →