YEJMKJ 3Pack Nema 17 Stepper Motor 1.8‌°‌ 2 Phase High Torque 0.47Nm(66.56oz·in) Bipolar 42x38mm 1.7A 2.1Ω 4-Lead Shaft 24mm φ5mm 42 Stepper Motor incl. Cable 1M for 3D Printer DIY Robot CNC Machine

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• Specifications: Nema 17 Stepper Motor has the following various dimensional parameters. Body size 42x42x37.5mm(1.66x1.66x1.48in), Shaft length 24±0.5mm, Shaft diameter φ5mm, D-cut length 24mm, Installation hole distance 31mm, with Cable 1m, 4-Lead Black (A+) Green (A-) Red (B+) Blue (B-), Weight 292g.
• Parameters: Nema 17 Stepper Motor 2 Phase, Step angle 1.8‌ Degree (200 steps/rev), Holding torque 0.47Nm (66.56oz·in), Resistance 2.1Ω, Rated current 1.7A, Inductance 3.5mH±20%, Rotor inertia approx 62g.cm².
• Safety: This Nema17 Stepper Motor ensures safe and reliable performance, and here are its key safety parameters. Dielectric strength 500V A.C 1 MINUTE; Insulation class(UL) B (130℃) [266°F]; Insulation resistance 100MΩ MIN; Operation ambient humidity 15%RH～95%RH; Operation ambient temperature -20℃ ～+50℃ [-4°F～122°F]; Temperature rise 80K MAX.
• Important Notes: Increasing speed lowers torque, with the recommended range of 0–600 RPM. Lower current results in lower torque and temperature rise, while reduced voltage decreases torque (range: 12–24V DC). The 42mm Stepper Motor is used in 3D printers, DIY robots, CNC machines, and other automated systems. Its compact size and high torque suit demanding applications.
• More Power, Less Noise: Engineered for minimal noise interference, our enhanced Nema 17 Step Motor boasts up to 20% greater holding torque through its higher-grade steel core construction and optimized winding technique. Experience smoother machine cycles with less surrounding disruption.

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