NEMA 11 closed loop stepper motor dual shaft 28AI51EC-1000B has a frame size 28-51mm , equipped with a 1000cpr incremental optical encoder & a length of 12.5mm rear shaft, has a rated current of 1.0A and a holding torque of 0.12Nm. It offers higher accuracy, higher output torque, higher speed, lower motor heating, lower power consumption, and faster response to drive controllers compared to open loop stepper motors. Recommended Drive: Leadshine CL42C Closed-Loop Stepper Motor Drive
NEMA 11 closed loop stepper motor dual shaft Specification

- Part Number: 28AI51EC-1000B
Step Angle: 1.8deg
Bipolar/Unipolar: Bipolar
Holding Torque: 0.12Nm
Rated Current/phase: 2.0A
Driving Voltage: 12-24VDC
Frame Size: 28x28mm
Body Length: 69.5mm
Front Shaft Diameter: Φ5mm
Front Shaft Length: 20mm - Rear Shaft Diameter: Φ5mm
Rear Shaft Length: 12.5mm - Encoder Type: Incremental Optical
Encoder Resolution: 1000CPR
If need motor + encoder + gearbox, we recommend the model 28AI32EC-HGXX as below link.
NEMA 11 Closed-loop Stepper Motor with Gearbox 32mm 1A (frankhuai.com)
A small tip:
1000CPR stands for 1000 Cycles Per Revolution. It’s a specification used with rotary encoders, specifically referring to their resolution.
Overall Size

If your drive controller don’t support Z signal, then you can leave Z unconnected.
If you need a PDF data sheet, please send an email to: info@frankhumotor.com!
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