YEJMKJ 3 Pack Nema 17 Stepper Motor TR8x8 400mm with T8 Lead Screw 1.8‌°‌ 2 Phase High Torque 0.44Nm (62.31oz·in) Bipolar 1.7A 2.2Ω 39mm 42 Stepper Motor incl. Cable 1M for 3D Printer DIY Robot CNC

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• Size Specifications: 3 Pack Nema 17 lead screw stepper motor dimensional parameters are as follows. Body size 42x42x38.7mm (1.66x1.66x1.53in), Lead screw TR8x8 400mm, Installation hole distance 31mm, 4-Lead, Black (A+) Green (A-) Red (B+) Blue (B-) , Cable 1M, Weight 416g.
• Parameters: Nema 17 linear actuator stepper motor with 400mm T8x8 lead screw, 2 Phase, Step angle 1.8‌ Degree(200 steps/rev), Holding torque 0.44Nm (62.31oz·in), Rated current 1.7A, Resistance 2.2Ω, Inductance 3.1mH±20%, Rotor inertia approx 65g.cm².
• Safety Specifications: This Nema17 lead screw Step motor with flange nut operates safely and reliably. Here are its key safety parameters: Dielectric strength 500V A.C 1 MINUTE; Insulation class(UL) B (130℃) [266°F]; Insulation resistance 100MΩ MIN; Temperature rise 80K MAX; Operation ambient temperature -20℃～+50℃ [-4°F～122°F]; Operation ambient humidity 15%RH～95%RH.
• Things to Note: With higher speeds, torque decreases. The ideal range for operation is 0–600 RPM. Lower current results in reduced torque and temperature rise, while lower voltage reduces torque (recommended: 12–24V DC). In 3D printers, DIY robots, and CNC machines, the 42mm Stepper Motor with T8 Lead Screw's compact size and high torque are perfect for a variety of demanding applications.
• High Torque Low Noise: Built with advanced steel cores and precisely tuned windings, this Nema 17 Stepper Motor with T8 Lead Screw generates up to 20% stronger holding torque while significantly reducing noise output. Achieve smoother machine motion and lower acoustic impact.

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