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SYT-RI30-40

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Shenzhen Seninter Precision Machinery Co.,Ltd.

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SYT-RI30-40

Name: SYTRI3040
Brand: SENINTER
Price: 1 USD

Length : 55.3mm

Voltage : 24-48VDC

Brand Name : SENINTER

Protocol : EtherCAT / CAN

OD : 40mm

Model Number : SYT-RI30-40

Weight : 0.18kg

Certification : CE ROHS

Max. Torque : 4.8N·m

Place of Origin : CHINA

Max. Speed : 90RPM

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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.

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

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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