This bipolar Nema 23 stepper motor is most popular, it with 1.8°step angle (200 steps/revolution). Each phase draws 2.8A, allowing for a holding torque of 1.9Nm(269oz.in).

Specifications:

• Manufacturer Part Number: 23HS30-2804S 57x76
• Shaft Diameter: 8mm
• Step Angle: 1.8°
• Step Accuracy: 5%
• Holding Torque: 1.9Nm(269oz.in)
• Rated Current/phase: 2.8A
• Phase Resistance: 1.13ohms
• Voltage: 3.2V
• Inductance: 5.4mH±20%(1KHz)
• Weight: 1.1kg
• Shaft Diameter: 8mm