Two-phase stepper motor 57BH51-100A-21-14

hybrid stepperNEMA 23compact

Overview
The 57BH51-100A-21-14 is a 57 mm (NEMA 23) 2‑phase hybrid stepper motor providing 0.677 N·m (6.9 kg·cm) holding torque with a 51 mm body length. Rated current is 1 A per phase. Recommended driver: CW542.

Key Highlights

• 2‑phase, 1.8° step angle — 6.9 kg·cm (0.677 N·m) holding torque
• Rated current: 1 A/phase — 57 mm (NEMA 23) frame
• Compact 51 mm body length, 6.35 mm shaft diameter, 4‑lead wiring

Electrical Specifications
Step angle: 1.8° ± 5%
Holding torque: 0.677 N·m (6.9 kg·cm)
Rated current: 1 A/Phase
Number of phases: 2
Number of leads: 4
Shaft diameter: 6.35 mm
Frame size: 57 mm (NEMA 23)
Body length: 51 mm
Weight: 0.62 kg
Recommended driver: CW542

Mechanical Drawing
Mechanical drawing for the 57BH series (57 mm / NEMA 23) is available showing mounting dimensions and hole pattern.

Torque-Speed Curve
Torque‑speed performance curve available for the 57BH series illustrating torque versus speed characteristics under rated current.

Technical Specifications

• Model: 57BH51 (example full code: 57BH51-100A-21-14)
• Phases: 2
• Step angle: 1.8° ± 5%
• Holding torque: 0.677 N·m (6.9 kg·cm)
• Rated current: 1 A/Phase
• Number of leads: 4
• Shaft diameter: 6.35 mm
• Frame size: 57 mm (NEMA 23)
• Body length: 51 mm
• Weight: 0.62 kg
• Recommended driver: CW542