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SYT-RI-70-80

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Shenzhen Seninter Precision Machinery Co.,Ltd.

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SYT-RI-70-80

Name: SYTRI7080
Brand: SENINTER
Price: 1 USD

Model Number : SYT-RI-70-80 CAN

Length : 73mm

Voltage : 24-48VDC

Protocol : EtherCAT / CAN

Brand Name : SENINTER

OD : 80mm

Weight : 0.9kg

Certification : CE ROHS

Max. Speed : 77RPM

Place of Origin : CHINA

Max. Torque : 108N·m

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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-RI-70-80

without brake Parameter Table

Parameter	Unit	Ratio 51	Ratio 81	Ratio 101	Ratio 121
Gear Ratio	-	51	81	101	121
Peak Torque	N·m	69	91	102	108
Max Allowable Torque At Average Load (Robot Application)	N·m	42	58	61	61
Rated Torque @ 2000RPM (Industrial Application)	N·m	32	42	50	50
Peak Output Speed	RPM	77	48	40	30
Rated Speed (With 1/2 Rated Torque)	RPM	61	38	30	25
Gear Backlash	arcsec	20	20	10	10
Rated Power	W	500	500	500	500
Supply Voltage	V	24–48	24–48	24–48	24–48
Max Continuous Current	A	8.4	8.4	8.4	8.4
Rated Current	A	6.1	6.1	6.1	6.1
Torque Constant	N·m/A	0.118	0.118	0.118	0.118
Encoder Resolution	bit	16	16	16	16
Communication Bus	-	CAN	CAN	CAN	CAN
Hollow Shaft Diameter	mm	18	18	18	18
Total Length	mm	73±0.5	73±0.5	73±0.5	73±0.5
Mass	kg	0.9	0.9	0.9	0.9
Rotational Inertia	g·cm²	596.4	596.4	596.4	596.4

Drawing with brake

SYT-RI-70-80

With brake Parameter Table

Parameter	Unit	Ratio 51	Ratio 81	Ratio 101	Ratio 121
Gear Ratio	-	51	81	101	121
Peak Torque	N·m	69	91	102	108
Max Allowable Torque At Average Load (Robot Application)	N·m	42	58	61	61
Rated Torque @ 2000RPM (Industrial Application)	N·m	32	42	50	50
Peak Output Speed	RPM	77	48	40	30
Rated Speed (With 1/2 Rated Torque)	RPM	61	38	30	25
Gear Backlash	arcsec	20	20	10	10
Rated Power	W	500	500	500	500
Supply Voltage	V	24–48	24–48	24–48	24–48
Max Continuous Current	A	8.4	8.4	8.4	8.4
Rated Current	A	6.1	6.1	6.1	6.1
Torque Constant	N·m/A	0.118	0.118	0.118	0.118
Encoder Resolution	bit	16	16	16	16
Communication Bus	-	CAN	CAN	CAN	CAN
Hollow Shaft Diameter	mm	18	18	18	18
Total Length	mm	91.5±0.5	91.5±0.5	91.5±0.5	91.5±0.5
Mass	kg	1.11	1.11	1.11	1.11
Rotational Inertia	g·cm²	746.7	746.7	746.7	746.7

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