YEJMKJ Nema 8 Stepper Motor 2 Phase 1.8‌°‌ 1.2Ncm(1.7oz·in) High Torque Bipolar 25mm 0.3A 21Ω 4-Lead Shaft 10mm φ4mm 20 Mini Stepper Motor Cable 0.5M for 3D Printer DIY Robot CNC Machine

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• Specifications: Nema 8 Stepper Motor has the following various dimensional parameters. Body size 20x20x24.2mm(0.79x0.79x0.96in), Shaft length 10±0.5mm, Shaft diameter φ4mm, D-cut length 7mm, Installation hole distance 15.5mm, Cable 0.5m, 4-Lead Black (A+) Green (A-) Red (B+) Blue (B-), Weight 42g.
• Characteristics: Nema 8 micro stepper motor 2 Phase, Step angle 1.8‌ Degree (200 steps/rev), Holding torque 1.2Ncm (1.7oz·in), Rated current 0.3A, Resistance 21Ω, Inductance 4.5mH±20%, Rotor inertia approx 1.6g.cm².
• Safety: This Nema 8 pancake stepper motor operates safely and reliably. 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 temperature -20℃ ～+50℃ [-4°F～122°F]; Operation ambient humidity 15%RH～95%RH.
• Important Notes: 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 20mm 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: Our upgraded Nema 8 Step Motor 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 disruptive machine performance.

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