YEJMKJ 5 Pack Nema 17 Stepper Motor TR8x8 240mm with T8 Lead Screw 1.8‌°‌ 2 Phase High Torque 0.44Nm (62.31oz·in) 1.7A 1.7Ω Bipolar 42x40mm 4-Wire Connector Cable 1M for 3D Printer DIY Robot CNC

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• Dimensional details: The physical dimensions of a 5 Pack Nema 17 lead screw stepper motor are summarized below. Body size 42x42x39.2mm (1.66x1.66x1.55in), Lead screw TR8x8 240mm, Installation hole distance 31mm, 4-Lead, Black (A+) Green (A-) Red (B+) Blue (B-) , with Cable 1M, Weight 368g.
• Specifications: Nema 17 linear actuator stepper motor with 240mm T8x8 lead screw, Step angle 1.8‌ Degree(200 steps/rev), 2 Phase Holding torque 0.44Nm (62.31oz·in), Resistance 1.7Ω, Rated current 1.7A, Inductance 3.1mH±20%, Rotor inertia approx 60g.cm².
• Operational Safety: This Nema17 lead screw Step motor with flange nut ensures safe and reliable performance, and here are its key safety parameters. Dielectric strength 500V A.C 1 MINUTE; Insulation resistance 100MΩ MIN; Insulation class(UL) B (130℃) [266°F]; Temperature rise 80K MAX; Operation ambient humidity 15%RH～95%RH; Operation ambient temperature -20℃～+50℃ [-4°F～122°F].
• Key Points to Remember: Faster speeds lead to lower torque; the recommended operating range is 0–600 RPM. Lower current reduces torque and temperature rise, while lower voltage decreases torque (recommended range: 12–24V DC). The 42mm Stepper Motor with T8 Lead Screw is widely used in 3D printers, DIY robots, CNC machines, and more. Its compact design and high torque make it ideal for tough applications.
• Precision-Built for Higher Output: Our upgraded Nema 17 Stepper Motor with T8 Lead Screw delivers up to 20% greater holding torque than typical models. Featuring enhanced steel cores and refined windings, it operates with noticeably reduced noise for smoother, ​less interruptive machine operation.

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