Nema 23 Stepper Motor Bipolar L=54.5mm w/ Gear Ratio 50:1 EG Series Planetary Gearbox

This Nema 23 stepper motor comes with a holding torque of 1.20Nm(169.93oz.in) and features a 50:1 high-precision EG series planetary gearbox that guarantees a maximum backlash of only 15arcmin, ensuring repeatable and precise motion.
Designed for reliability in rigorous operating conditions, this geared motor offering significantly improved positional accuracy and repeatability compared to standard PG series gearboxes. Combining power, precision, and durability, this motor-gearbox solution is ideal for CNC machinery, automated handling systems, robotics, and other applications where torque, accuracy, and long-term reliability are critical.

Electrical Specification

• Part Number: 23HS22-2904S-EGS50
• Motor Type: Bipolar Stepper
• Holding Torque without Gearbox: 1.20Nm(169.93oz.in)
• Rated Current/phase: 2.90A
• Phase Resistance: 0.90ohms±10%
• Inductance: 2.60mH±20%(1KHz)
• Insulation Class: B 130°C[266°F]

Gearbox Specifications

• Gearbox Type: Spur Planetary
• Gear Material: Alloy Steel
• Gear Ratio: 50:1
• Efficiency: 94%
• Backlash at No-load: <=15arcmin
• Maximum Permissible Torque: 25.00Nm(3540.29oz.in)
• Moment Permissible Torque: 50.00Nm(7080.58oz.in)

Physical Specification

• Frame Size: 60 x 60mm
• Motor Length: 54.5mm
• Gearbox Length: 73mm
• Output Shaft Type: Keyway
• Output Shaft Diameter: Φ14mm
• Output Shaft Length: 35mm

Connection