This Nema 23 stepper motor with 55mm body and 2.8A rated current, integrated with a 61.65mm Planetary gearbox of 100:1 gear ratio. It's a good solution to applications that with special space but need low speed and/or high torque.

Electrical Specification

• Manufacturer Part Number: 23HS22-2804S-HG100
• Motor Type: Bipolar Stepper
• Step Angle: 0.018 deg
• Holding Torque without Gearbox: 103Ncm(146oz.in)
• Rated Current/phase: 2.8A
• Phase Resistance: 0.9ohms
• Voltage: 2.5V
• Inductance: 2.8mH ± 20%(1KHz)

Gearbox Specifications

• Gearbox Type: Planetary
• Gear Ratio: 100 : 1
• Efficiency: 90% 
• Backlash at No-load: <=25 arcmin
• Max. Permissible Torque: 25Nm(3540oz.in) 
• Moment Permissible Torque: 40Nm(5664oz.in) 
• Max. Radial Load: 400N
• Ambient Temperature: -10 - 90℃
• Insulation Class: B
• Noise: <=50 dB

Physical Specifications

• Frame Size: 57 x 57mm
• Motor Length: 55mm
• Gearbox Length: 61.65mm
• Shaft Diameter: Φ14mm
• Shaft Length: 34mm
• Key-way Length: 25mm
• Number of Leads: 4
• Lead Length: 320mm
• Weight: 1800g

Connection