Robots /Joint modules and robot parts /HR Series Harmonic Joint Module
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Robot joint

HR Series Harmonic Joint Module

by Zhidongli · Wuhan, Hubei (also Wuxi, Jiangsu) · Joint modules

Hollow-shaft harmonic joint modules in five sizes, peak torque from 16 to 841 N.m, 48 VDC with EtherCAT or CANopen and optional dual encoder and torque sensor.

Key specs
Weight
6.7 kg15 lb
Protection
IP40
Power supply
48 VDC
5 models in this family
HR0090HR0120HR0240HR0680HR1000
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Full specifications

ModelsHR0090-052H101-48M0, HR0120-070H081-48M0, HR0240-080H101-48M0, HR0680-110H101-48M0, HR1000-142H161-48M0
Joint diameter52 / 70 / 80 / 110 / 142 mm
Joint length80 / 86.5 / 91.5 / 122 / 153 mm
Hollow bore diameter6 / 9.8 / 12 / 20 / 22 mm
Joint weight0.4 / 1.1 / 1.4 / 2.9 / 6.7 kg
Gear ratio101 / 81 / 101 / 101 / 161 (configurable)
Reducer backlash≤20 arcsec
Transmission accuracy<1 arcmin
Average service life20,000 h
Start/stop allowable torque8.5 / 30 / 70 / 204 / 433 N·m
Average load torque6.5 / 14 / 46 / 140 / 281 N·m
Maximum instantaneous torque16 / 61 / 138 / 369 / 841 N·m
Rated speed34 / 43 / 34 / 34 / 20 rpm
Maximum speed50 / 52 / 42 / 42 / 25 rpm
Repeatability<60 arcsec
Absolute positioning accuracy<300 arcsec
Motor power90 / 120 / 240 / 680 / 1000 W
Rated voltage48 VDC
Rated current2.5 / 3.7 / 6.5 / 18 / 23.2 A (rms)
Peak current8 / 5.5 / 14 / 37 / 53 A (rms)
CommunicationEtherCAT, CANopen
EncoderSingle multi-turn absolute encoder; dual encoder optional
Torque sensorOptional
Protection ratingIP40

As printed in the Zhidongli catalog, page 5. Confirm final specs in your quote.

What it does well

  • Five sizes from 52 mm to 142 mm diameter
  • Hollow bore for cabling
  • Optional dual encoder and torque sensor

Applications

Humanoid robot jointsRobot armsExoskeletons

Industries

Humanoid robot buildersResearch labs

Watch Zhidongli machines run

Filmed at the Zhidongli booth, CIIF 2026, Shanghai.

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