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

HR Series Planetary Joint Module

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

Planetary-gear rotary joint module with 48 V motor and EtherCAT, in 88 N.m and 55 N.m rated torque sizes.

Key specs
Weight
2.1 kg4.6 lb
Protection
IP40
Power supply
48V
2 models in this family
88 N·m55 N·m
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Full specifications

Rated torque88 N·m / 55 N·m
Max acceleration/deceleration torque250 N·m / 150 N·m
Rated speed70 rpm
Peak speed (no load)90 rpm / 100 rpm
Rated power680 W / 420 W
Rated voltage48 V
Rated current20 A / 11 A
Peak current60 A / 35 A
EncoderMulti-turn absolute encoder
GearboxPlanetary, ratio 50
Transmission accuracy5 arcmin
Average service life10,000 h
CommunicationEtherCAT
Diameter110 mm / 90 mm
Length102 mm / 108 mm
Weight2.1 kg / 1.5 kg
Protection ratingIP40

As printed in the Zhidongli catalog, page 4. Confirm final specs in your quote.

What it does well

  • Torque density 120 N·m/kg on the top module (company claim)
  • Customization available

Applications

Humanoid robot jointsRobotic actuators

Industries

Humanoid robot buildersResearch labs

Watch Zhidongli machines run

Filmed at the Zhidongli booth, CIIF 2026, Shanghai.

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