Two-phase stepper motor 57BHH56-280B-21DC

hybrid stepperNEMA 23

Product summary
The 57BHH56-280B-21DC is a 57 mm (NEMA 23) 2-phase hybrid stepper motor providing 1.089 N·m (11.1 kg·cm) holding torque in a compact 56 mm body. Rated 2.8 A/phase, it is suited to precision positioning and motion control tasks in industrial automation. Recommended driver: CW542.

Key highlights

• 2-phase hybrid design — 1.8° step angle
• Holding torque 1.089 N·m (11.1 kg·cm)
• Rated current 2.8 A/phase, 57 mm (NEMA 23) frame
• 56 mm body length, 6.35 mm shaft diameter

Electrical specifications (summary)
Step angle — 1.8° ± 5%
Holding torque — 1.089 N·m (11.1 kg·cm)
Rated current — 2.8 A/Phase
Number of phases — 2
Number of leads — 4
Shaft diameter — 6.35 mm
Frame size — 57 mm (NEMA 23)
Body length — 56 mm
Weight — 0.65 kg
Recommended driver — CW542

Mechanical drawing
Mechanical drawing available for the 57BH series (57 mm / NEMA 23) showing mounting, flange and dimensional details for integration.

Torque-speed curve
Torque-speed performance chart provided for the 57BH series to assess available torque across operating speeds and to select suitable drivers and gearboxes.

Technical specifications

• Model: 57BHH56-280B-21DC
• Frame size: 57 mm (NEMA 23)
• Body length: 56 mm
• Step angle: 1.8° ± 5%
• Number of phases: 2
• Rated current: 2.8 A/Phase
• Holding torque: 1.089 N·m (11.1 kg·cm)
• Shaft diameter: 6.35 mm
• Number of leads: 4
• Weight: 0.65 kg
• Recommended driver: CW542