HARDWARE / PRODUCTAdded 23 Aug 2026

HPN-A Planetary Gearbox

Harmonic Drive
HPN-A Planetary Gearbox

The HPN Harmonic Planetary® Value Series Gearbox offers a low-cost solution with high torque, quiet performance, and long life, without compromising on quality.

Key figurescomparable across the catalogue

Mass
0.44 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

Peak torque
9 Nm to 752 Nm
Ratios
3:1 to 50:1
Backlash
<5 arc-min (single stage), <7 arc-min (two stage)
Frame Sizes
5
Max. Input Speed
10,000 rpm
Mass
0.44 kg (HPN-11A-4)
K1 Torsional Stiffness
0.2 10^4 Nm / rad (HPN-11A-4)
Output Permissible Radial Load
240 N (HPN-11A-4)
Output Permissible Axial Load
280 N (HPN-11A-4)

About

The HPN Harmonic Planetary® value series gearbox provides a low cost solution without the need to compromise on quality or performance. The HPN Series features helical gears for high torque, quiet performance and long life. Backlash of <5 arc minutes (for single stage) is maintained for the life of the gear. HPN right angle servo gearheads offer a wide range of reduction ratios in a space saving geometry. These low backlash devices employ a spiral bevel gear pass to turn the corner. The output pass is a planetary design with helical planets supported by a full complement of needle rollers. HPN Harmonic Planetary® gears are available with a smooth output shaft or a shaft with a key and tapped center hole. The HPN gearheads are available with short lead times and are designed to couple to any servo motor with our Quick Connect® mounting system. This value series of planetary gears carry the reputation for quality and reliability for which Harmonic Drive® products are known throughout the world.

Documentation

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

Source: www.harmonicdrive.net ↗

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