Hybrid stepper motor 57BHH94-430B-21

two-phase stepperNEMA 23high-torque

Product Overview
The 57BHH94-430B-21 is a 57 mm (NEMA 23) 2-phase hybrid stepper motor delivering 2.551 N·m (26 kg·cm) of holding torque in a 94 mm body. With a rated current of 4.2 A/phase and a 10 mm shaft, it is suited for precision motion-control applications requiring compact high-torque performance. Recommended driver: CWD556.

Key Highlights

• 2-phase, 1.8° step angle — 26 kg·cm (2.551 N·m) holding torque
• Rated current 4.2 A/phase — 57 mm (NEMA 23) frame
• 94 mm body length, 10 mm shaft diameter

Electrical Specifications
Step angle — 1.8° ± 5%
Holding torque — 2.551 N·m (26 kg·cm)
Rated current — 4.2 A/phase
Number of phases — 2
Number of leads — 4
Shaft diameter — 10 mm
Frame size — 57 mm (NEMA 23)
Body length — 94 mm
Weight — 1.6 kg
Recommended driver — CWD556

Mechanical & Performance Graphics
Mechanical drawing (57BH series) and torque-speed curve (57BH series) are provided as reference images for mounting dimensions and performance characteristics.

Datasheet
Product datasheet reference: 57BHH94-430B-21

Technical specifications

• Model: 57BHH94-430B-21
• Series: 57BH / 57BHH
• Phase: 2
• Step angle: 1.8° ± 5%
• Holding torque: 2.551 N·m (26 kg·cm)
• Rated current: 4.2 A/phase
• Number of leads: 4
• Shaft diameter: 10 mm
• Body length: 94 mm
• Frame size: 57 mm (NEMA 23)
• Weight: 1.6 kg
• Recommended driver: CWD556