Leadshine 20CM005 NEMA 8 Stepper Motor 0.05 N-m 0.4 A

This Leadshine 20CM005 NEMA 8 bipolar stepper motor delivers 0.05 N·m (7 oz·in) of holding torque in an ultra-compact 20 × 20 mm frame with a 45 mm body length, weighing only 0.1 kg. It features a 1.8° step angle with ±0.09° accuracy, 4-lead bipolar wiring, a Φ5 mm shaft, IP40 protection, and Class B insulation, with a rated current of 0.4 A per phase and 12–24 VDC operation, matched with the M322C digital driver for smooth open-loop control. Its miniature footprint and lightweight design make it well suited to space-critical micro-motion axes in miniature 3D printers, small CNC and engraving equipment, medical and analytical instruments, optical focusing and adjustment mechanisms, automated micro-dispensing systems, and palm-sized robotic joints where minimal size and weight are essential. The matched drive is M322C.

General Specification

• Step angle: 1.8°
• Position accuracy: 1.8±0.09°
• Dielectric strength: 500 VAC 1 min
• Insulation resistance: 100M Ohm (500 VDC)
• Insulation class: B
• Temp rise(Max): 80 K
• Radial play: Max. 0.02 mm (Load 450g)
• Axial play: Max. 0.08mm (Load 900g)

Electrical Specification

• Manufacturer Part Number: 20CM005
• Step Angle: 1.8 deg
• Bi/Unipolar: Bipolar
• Holding Torque: 0.05 N-m
• Rated Current/phase: 0.4 A
• Phase Resistance: 7.0 ohms
• Inductance: 3.4 mH
• Driving Voltage: 12-24 VDC

Physical Specification

• Frame Size: 20x20 mm
• Body Length: 45 mm
• Shaft Diameter: Φ5mm
• Shaft Length: 10 mm
• Number of Leads: 4
• Lead Length: 300mm
• Weight: 0.1 kg

Connection

• Black: A+, Green: A-, Red: B+, Blue: B-