Four-phase stepper motor 57BHH100-420A-21B

hybrid stepperNEMA 23for robotics

Overview
The 57BHH100-420A-21B is a 57 mm (NEMA 23) 4-phase hybrid stepper motor delivering 2.747 N·m (28 kg·cm) of holding torque in a 100 mm body. With a rated current of 2.97 A/phase, it offers consistent performance for precision motion control in industrial automation and robotics. Recommended driver: CWD556.

Key Highlights

• 4-phase, 1.8° step angle — 2.747 N·m (28 kg·cm) holding torque
• Rated current 2.97 A/phase — 57 mm (NEMA 23) frame
• 100 mm body length, 8 mm shaft diameter, 8 leads

Electrical Specifications
Step angle: 1.8° ± 5%
Holding torque: 2.747 N·m (28 kg·cm)
Rated current: 2.97 A/phase
Phases: 4
Leads: 8
Shaft diameter: 8 mm
Frame size: 57 mm (NEMA 23)
Body length: 100 mm
Weight: 2 kg
Recommended driver: CWD556

Mechanical Drawing
Mechanical drawing for the 57BH series is available on the product page.

Torque-Speed Curve
Torque-speed curve for the 57BH series is available on the product page.

Product Datasheet
Datasheet identifier: 57BHH100-420A-21B (PDF available on the product page).

Technical Specifications

• Step angle: 1.8° ± 5%
• Holding torque: 2.747 N·m (28 kg·cm)
• Rated current: 2.97 A/phase
• Phases: 4
• Leads: 8
• Shaft diameter: 8 mm
• Frame size: 57 mm (NEMA 23)
• Body length: 100 mm
• Weight: 2 kg
• Recommended driver: CWD556