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Quality SYT-RI30-40 factory
Quality SYT-RI30-40 factory
Quality SYT-RI30-40 factory
Quality SYT-RI30-40 factory
Quality SYT-RI30-40 factory

SYT-RI30-40

Basic Properties
Place of Origin: CHINA
Brand Name: SENINTER
Certification: CE ROHS
Model Number: SYT-RI30-40
Product Summary
Humanoid Robot Joint Module (Rotary Actuator) Structure – Core Components Output Flange / Connector – Connects to robot links (e.g., lower leg, forearm), outputs torque and motion. Torque Sensor (optional but common in high-performance designs) – Ring or spoke type, used for force control / ...

Product Details

OD: 40mm
Length: 55.3mm
Max. Torque: 4.8N·m
Max. Speed: 90RPM
Voltage: 24-48VDC
Weight: 0.18kg
Protocol: EtherCAT / CAN
Product Description

Humanoid Robot Joint Module (Rotary Actuator) Structure – Core Components 

Output Flange / Connector – Connects to robot links (e.g., lower leg, forearm), outputs torque and motion.

Torque Sensor (optional but common in high-performance designs) – Ring or spoke type, used for force control / collision detection.

Harmonic Drive – Consists of a wave generator, flexspline, and circular spline; mounted on the motor output shaft.

Frameless Torque Motor – Stator fixed to the housing, rotor connected to the wave generator.

Brake (Safety Holding Brake) – Locks the joint position when power is lost.

Dual Encoders – Motor-side encoder (measures speed/position) and output-side encoder (eliminates reducer backlash error); commonly used for full closed-loop control.

Driver (Servo Drive Board) – Integrated inside the module or in a compact package.

Housing / Cooling Structure – Aluminum alloy body with cable channels.

 SYT-RI30-40

Drawing without brake

SYT-RI30-40







  without brake Parameter Table


Parameter Unit Ratio 51 Ratio 101
Gear Ratio - 51 101
Peak Torque N·m 3.3 4.8
Max Allowable Torque At Average Load (Robot Application) N·m 2.3 3.3
Rated Torque @ 2000RPM (Industrial Application) N·m 1.8 2.4
Peak Output Speed RPM 118 59
Rated Speed (With 1/2 Rated Torque) RPM 90 45
Gear Backlash arcsec 40 40
Rated Power W 36 36
Supply Voltage V 24–48 24–48
Max Continuous Current A 2 2
Rated Current A 1 1
Torque Constant N·m/A 0.024 0.024
Encoder Resolution bit 16 16
Communication Bus - CAN CAN
Hollow Shaft mm 6 6
Length mm 60±0.5 60±0.5
Mass kg 0.19 0.19
Inertia g·cm² 27.4 27.4



Drawing with brake



SYT-RI30-40


With  brake Parameter Table


Parameter Unit Ratio 51 Ratio 101
Gear Ratio - 51 101
Peak Torque N·m 3.3 4.8
Max Allowable Torque At Average Load (Robot Application) N·m 2.3 3.3
Rated Torque @ 2000RPM (Industrial Application) N·m 1.8 2.4
Peak Output Speed RPM 118 59
Rated Speed (With 1/2 Rated Torque) RPM 90 45
Gear Backlash arcsec 40 40
Rated Power W 36 36
Supply Voltage V 24–48 24–48
Max Continuous Current A 2 2
Rated Current A 1 1
Torque Constant N·m/A 0.024 0.024
Encoder Resolution bit 16 16
Communication Bus - CAN CAN
Hollow Shaft Diameter mm 6 6
Total Length mm 78.6±0.5 78.6±0.5
Mass kg 0.27 0.27
Rotational Inertia g·cm² 45.1 45.1


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