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Knee Joint Motor MG 8108-36 – BLDC Servo with 36:1 Planetary Gearbox

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Categories	Knee Joint Motor
Brand	Solismotor Custom Robot Joint Drives
Model	MG8108-36
Rated Torque	32.76N·m
Peak Torque	109.50N·m
Gear Ratio	36:1 Planetary
Encoder	14-Bit, Dual Support
Communication	CAN Bus / RS485
Protection	IP54
Weight	~760g
Dimension	Ø96*57mm

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Detail Information

MG8108-36 Integrated Robot Joint Motor

Achieving high torque output, precise position control, and excellent dynamic response performance within a compact structure. It supports position control, velocity control, torque control, and MIT hybrid control modes, meeting the motion control requirements of multi-degree-of-freedom robot joints under high-load, low-speed, and high-precision operating conditions.

Ø96*57mm Ultra-Compact 32.76N.m Rated /109.50N.m Peak Torque 36:1 Precision Planetary Gearbox IP54 Protection Rating 14-Bit High-Resolution Encoder

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Engineered for Precision Motion

Feature – Integrated All-in-One Design

The MG8108-36 integrates a BLDC servo motor, 36:1 planetary gearbox, drive electronics, and dual encoders in a singleØ96*57mm housing. This eliminates the need for separate component sourcing, wiring, and tuning.

Advantage – Reduced System Complexity

By combining motor, gearbox, driver, and encoder into one module, engineers can cut development time by up to 60% and simplify overall system architecture significantly.

Benefit – Faster Time to Market

With plug-and-play integration, R&D teams can focus on application-level development rather than motor control, accelerating robot prototyping and production ramp-up.

Feature – High Torque Density

Rated output torque of 32.76N·m with peak stall torque reaching 109.50N·m. The 36：1 planetary gearbox delivers exceptional torque density in a compact form factor.

Advantage – Superior Dynamic Performance

High torque-to-weight ratio enables faster acceleration, smoother motion, and greater load capacity — critical for responsive robot joint movement.

Benefit – Handles Demanding Applications

Suitable for humanoid robots, collaborative robots, and exoskeletons where high torque and compact size are essential for natural, powerful motion.

Feature – Dual Encoder Feedback & IP54 Protection

Built-in 14-bit high-resolution encoder with support for secondary encoder feedback on the output shaft. IP54-rated sealed housing protects against dust and water splashes.

Advantage – Precision & Reliability

Dual-loop feedback ensures accurate position, speed, and torque control. IP54 enables deployment in harsh industrial environments without performance degradation.

Benefit – Long-Term Operational Stability

Reliable feedback and environmental protection reduce maintenance needs and ensure consistent performance over extended operating periods.

Technical Specifications

ParameterValue

ModelMG 8108-36

Winding MethodY (Star)

Voltage Range12 ~ 48 VDC

Rated Torque32.76N·m

Peak Torque109.50N·m

Gear Ratio36:1 (Planetary)

Encoder Resolution14-Bit

CommunicationCAN Bus / RS485

Protection RatingIP54

Weight (with driver)~760g

Dimension (with driver)Ø96*57mm

Noise< 60 dB

Working Temperature-20 ~ +80 °C

Dual Encoder SupportYes (Output Shaft)

Custom Brake SupportYes

Key Applications

Humanoid Robots

Joint actuation for bipedal and full-body humanoid platforms

Collaborative Robots

Safe, precise motion for cobot arms and grippers

Exoskeletons

Power assist and rehabilitation exoskeleton systems

Education & Research

Robotics labs, university projects, and prototyping

Medical Assistants

Surgical robots and rehabilitation equipment

Smart Automation

Automated guided vehicles and smart manufacturing

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