Stepper motor

Ideal for 3D printers, CNC machines, or any other machine that requires reliable, high torque, incremental movement.

The three sizes of NEMA stepper motors here—NEMA 14, 17, and 23—refer to the size of the motor and hence the amount of torque that the motor is capable of; the larger the motor, the more torque (specific torque values are in the tables below).

Please note: while the NEMA 14 and 17 come with detachable cables terminating in female headers, the cable on the NEMA 23 is non-detachable and terminates in bare wires.


NEMA 14 (35mm) NEMA 17 (42mm) NEMA 23 (57mm)
Step angle 1.8°
Step angle accuracy 1.8°±5% (full step, no load)
Resistance accuracy ±10%
Inductance accuracy ±20%
Temperature rise 80°C Max. (2 phase on)
Ambient temperature -20°C~+50°C
Insulation resistance 100MΩ Min. , 500VDC
Shaft radial play 0.02 Max. (450 g-load)
Shaft axial play 0.08 Max. (450 g-load)
Max. radial force 28N (20mm from the flange) 75N (20mm from the flange)
Max. axial force 10N 15N
Rated current (Amps/phase) 1.00 1.68 2.8
Holding torque ( 25.0 62 175.0
Holding torque ( 1.8 4.4 12.6
Resistance (Ohms/phase) 2.7 1.65 0.90
Inductance (mH/phase) 4.0 3.6 2.5
Inertia (g.cm2) 14 54 300
Detent torque ( 100 150 400
Weight (kg) 0.18 0.28 0.72
Dimensional drawing link link link
Torque curve diagram
link link link


For the NEMA 14 and 17 stepper motors, the red (+) and blue (-) wires control bipolar driver A and the green (+) and black (-) bipolar driver B.

For the NEMA 23 stepper motor, the red (+) and green (-) wires control bipolar driver A and the yellow (+) and blue (-) wires control bipolar driver B.