NEMA 23 Geared Closed Loop Stepper Motor: This strong geared closed-loop stepper motor has a frame size 57-56mm with rated current 3.5a, integrated with a HG series precision planetary gearbox & a 1000cpr resolution incremental optical encoder. It is an an ideal choice for the applications that require high torque or low speed but high precision motion control and positioning feedback.
NEMA 23 Geared Closed Loop Stepper Motor Specification

- Part Number: 57AI56EC-HGXX
- Step Angle: 1.8deg w/o gearbox
- Bi/Unipolar: Bipolar
- Holding Torque: 1.2Nm w/o gearbox
- Rated Current/phase: 3.5A
- Frame Size: 57x57mm
- Motor Length: 56mm
- Number of Leads: 4
- Lead Length: 500mm
- Encoder Type: Incremental Optical
- Encoder Resolution: 1000CPR
- Gearbox Type: Planetary
- Gear Ratio: 3-100:1
- Efficiency: 96%-92%
- Backlash at No-load: 15arcmin-25arcmin
- Gearbox Length: 53mm-70mm
- Shaft Diameter: Φ14mm
- Shaft Length: 33.5mm
- Keyway Length: 25mm
- Stepper Drive: CL57C
Overall Size

Gearbox Length(L)=53mm for ratio 5/1, 10/1; 70mm for ratio 20/1, 50/1, 100/1
If you need a PDF data sheet, please send the email to: info@frankhumotor.com!
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