NEMA 11 closed loop stepper motor 0-12nm has a frame size 28-51mm , equipped with a 1000cpr incremental optical encoder, has a rated current of 2.0A 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 0-12nm Specification
- Part Number: 28AI51EC1-1M
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: 66.6mm
Shaft Diameter: Φ5mm
Shaft Length: 20mm
D-cut Length: 15mm
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

Motor 4 Leads Connection: A+(Black), A-(Green); B+(Red), B-(Blue)
Encoder 8 Leads Connection: A+(Black), A-(Blue); B+(Yellow), B-(Green), Z+(Brown), Z-(Grey), 5V(Red), GND((White)
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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