Features142 Stepper Motor: The stepper motor with low power, smooth speed, stable performance, low noise and no loss during operation, which ensures the stable operation of the extrusion mechanism. 2High Torque: 3D printer stepper motor has low self inductive reactance, good responsivenes, longer life and low working temperature. Low loss stators have better high speed performance. 3Low Resistance: Stepper motor gets low resistanse, thus enables good thermal conductivity. It will work at a safe temperature. Keep your machine running smoothly and quietly with 1.8 degree stepper motor. 4Low Noise: The internal rotor of stepper motor adopts German tech. And the surface is coated with imported rotor glue to prevent the burr on the surface caused by the oxidative grinding of carbon steel that cause the motor noise. 5Wide Application: This small stepper motors can be used in various area, such as 3D printer, stage lighting, engraving, textile machinery, placement machine, non standard equipment, automation equipment etc.SpecificationItem Type: 42 Stepper MotorMaterial: Carbon SteelPhase: 2 PhaseStep Angle: 1.8 DegreeRated Voltage: 3.8V DCRated Current: 1.0A DCHolding Torque: 0.22N.M MinStarting Speed: 600 RPMOperating Speed: 800 RPMPhase Resistance: 3.810%Phase Inductance: 3.8mH10%Rotor Inertia: 24 g.cmInsulation Resistance: 100m minInsulation Class: Class BProduct Size: Approx. 42x23mm / 1.7x0.9inPackage List1 x42 Stepper Motor1 x Cable