Specifications

Gear Ratio

Continuous Torque

5 / 7 Nm

Intermittent Torque

25 Nm (<2s)

Continuous Speed

120 rpm

Voltage

48 VDC

Communication Interface

CAN / CAN-FD

Resolution (Motor / Reducer)

17-Bit / 17-Bit

Weight

Approx. 360 g

Product Type

Planetary Joint Module

Dimensions (OD × Height)

55 mm × 53 mm

Max No-Load Speed

140 rpm

Encoder

Dual Encoders

Encoder Repeatability

±40″

Rated Load / Peak Phase Current

4 Arms / 13 Arms

Driver

Integrated

Hollow Diameter

None

1. High Torque Density Motor

High peak torque density (>220Nm/kg) tailored for high-dynamic humanoid legs and quadruped joint bursts.
Industrial-grade shock-resistant winding, built for rapid acceleration and reversal.
Optimized air-gap diameter delivering maximum continuous torque and rapid transient response.

2. Precision Planetary Gearbox

Heavy-duty precision ground planetary gears with ≤1–3 arcmin backlash and high torsional stiffness.
Impact-resistant design withstands up to 500 N·m peak shock torque during jumping or sudden stops.
Ultra-high efficiency (≥95%) ensuring lower heat dissipation and extended battery life.

3. Dual Absolute Encoders

Vibration-hardened structural encoder design preventing signal dropouts under severe mechanical shocks.
Dual absolute feedback (17–19 bit) with angular repeatability within ±40″.
Shielded magnetic encoding immune to high-current stator magnetic interference.

4. Integrated FOC Drive

High-power drive supporting 48V/72V dual-voltage systems for maximal power throughput.
High-precision phase current sensing with sub-millisecond torque response (<1ms).
Multi-layered hardware protections against over-current, over-voltage, and thermal overload.

5. Fail-Safe Holding Brake

High-holding-torque brake matching the high payload output without mechanical slippage.
Fail-safe security maintains structural holding power for humanoid robots during total power failure.
Wear-resistant friction lining engineered for frequent emergency stops (E-Stops).

Key Features

High torque output	up to 112 N·m continuous (160 N·m at 20-min duty), up to 500 N·m intermittent
Heavy-duty rigidity	a stiff structure that absorbs shock loads, built for frequent start-stop cycles and dynamic motion
Long service life	≥3,000 h under standard lab duty conditions
Fully integrated	motor, planetary gearbox, dual encoders, and drive built in; ready to install
Dual supply options	48 VDC / 72 VDC
Explosion-proof option	customizable to Ex db IIB T4 and similar ratings for demanding environments
Accurate feedback	dual encoders, 17–19 bit, ±40 arcsec repeatability
Fieldbus options	CAN/CAN-FD and EtherCAT, with CANopen / CANMIT support (per-model support in the datasheet)

Applications — where torque, rigidity, and impact tolerance decide the design

Humanoid robot lower limbs: hip, knee, and ankle load-bearing joints for walking, jumping, and carrying loads
Quadruped and wheel-legged robots: leg and hip joints plus in-wheel drives, for running, climbing, and rough terrain with repeated impacts
Special-purpose robots: inspection, rescue, and security platforms working in heavy-duty conditions
Heavy industrial robot axes: applications that need real torque and stiffness
Exoskeletons: powered assistance that balances torque with responsiveness

Selection Notes

No through-bore: OD4250 / OD5553 / OD6345 / OD7067 / OD8567
With through-bore (8–15 mm): the other 9 models, for running cables through the axis
Supply voltage: 48 VDC only: OD4250 / OD5553 / OD6345; 72 VDC only: OD7067 / OD10483.5 (V1) / OD12588 (V1) / OD150100; 48/72 VDC on the other 7 models
Communication: most models run CAN/CAN-FD; some add EtherCAT; one model is CAN-FD only — see the datasheet for per-model support
Full specs: per-model details (ratio / torque / phase current / dimensions) in the complete datasheet

Request a Quote

Need selection support or a custom solution? Contact RoBox Robotics for a quote.

PM-RB-OD5553