YEJMKJ 3Pack Nema 17 Stepper Motor 2 Phase 1.8‌°‌ 0.41Nm(58.06oz·in) High Torque Bipolar 40mm 2.0Ω 1.5A 4-Lead Shaft 24mm φ5mm 42 Stepper Motor Cable 1M for 3D Printer CNC DIY Robot Machine

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• Specifications: Nema 17 Stepper Motor 2 Phase, Step angle 1.8‌ Degree (200 steps/rev), Holding torque 0.41Nm (58.06oz·in), Resistance 2.0Ω, Rated current 1.5A, Rotor inertia approx 60g.cm², Inductance 3.8mH±20%.
• Dimensional details: The physical dimensions of a Nema 17 Stepper Motor are summarized below. Body size 42x42x40mm(1.66x1.66x1.58in), Shaft length 24±0.5mm, Shaft diameter φ5mm, D-cut length 24mm, Installation hole distance 31mm, incl. Cable 1m, 4-Lead Black (A+) Green (A-) Red (B+) Blue (B-), Weight 296g.
• Safety: Operating safely and reliably, this Nema 17 Step motor comes with the following key safety parameters. Dielectric strength 500V A.C 1 MINUTE; Insulation class(UL) B (130℃) [266°F]; Insulation resistance 100MΩ MIN; Operation ambient temperature 15%RH～95%RH-20℃ ～+50℃ [-4°F～122°F]; Operation ambient humidity ; Temperature rise 80K MAX.
• Smooth, Powerful Drive: Built with advanced steel cores and precisely tuned windings, this Nema 17 Step Motor generates up to 20% stronger holding torque while significantly reducing noise output. Achieve smoother machine motion and lower acoustic impact.
• Important Insights: With higher speeds, torque decreases. The ideal range for operation is 0–600 RPM, and up to 1800 RPM for closed-loop systems. Lower current results in reduced torque and temperature rise, while lower voltage reduces torque (recommended: 12–24V DC). The 42mm Stepper Motor fits 3D printers, DIY robots, CNC machines, and other automated systems, offering a small size and high torque for performance-driven tasks.

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