U38 series Frameless torque motorOuter diameter ( OD ) : 38mm

A frameless motor with a 38mm outer diameter and an 18mm aperture, designed for direct drive of robot joints, provides stable torque and precise speed control. Rated torque options range from 0.025Nm to 0.075Nm. It is highly customizable with various options to meet specific needs.

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Specification

Main Parameters		U3815	U3822	U3834
Voltage(VDC)		48	48	48
Rated Output (W)		31	63	110
Rated torque (Nm)		0.1	0.2	0.35
Instant Max Torque (Nm)		0.3	0.6	1.1
Rated Current (Arms)		3	3.5	4
Instant Max Current (Arms)		9	10.5	12
Rated Speed (rpm)		3000	3000	3000
Max Speed (rpm)		6000	6000	6000
Torque Parameter (Nm/Arms)		0.04	0.06	0.09
Rotor inertia 10^-4kg.m²		0.02	0.04	0.07
Back EMF coefficient (Vrims/rad/s)		8	10	10
Resistance (Ω)		1.6	1.3	1
Inductance (mH)		1.28	1.1	0.9
Pole-pairs number (2P)		7	7	7
Weight (kg)		0.048	0.068	0.099
Motor height L (mm)	L1	10	17	28
	L2	9	16	27
	L3	15.3	22.3	34.3