Nema 17 Stepper Motors

ATO Nema 17 bipolar stepper motor has 1.8° per step for smooth motion and a nice holding torque. The motor was specified to have a max current of 2amp so that it could be driven easily with an motor driver and a wall adapter or lead-acid battery. This hybrid stepper motor with an end face size of 1.7 inches x 1.7 inches (42mm x 42mm), allowing for holding torque of 16N·cm to 65N·cm. 2A closed loop stepper motor allows for holding torque of 40N·cm to 72N·cm. Widely used in 3D printers, CNC routers, robot arms, sewing machines, engraving machines, film cutting machines and other equipment.

Basic Parameters

Step Angle: 1.8°
Flanged Size: 42 x 42mm (Nema 17)
Shaft Diameter: 5mm
Lead Wires: 4 Wire
Step Angle Accuracy: ±5% (Full Step, No Load)
Temperature Rise: 80℃ Max. (rated current, 2 phase on)
Ambient Temperature: -20℃~+50℃

Nema 17 stepper motor

Model Selection

ModelMotor LengthRated CurrentHolding Torque
ATO-STEP-17X08030mm0.8A16 N·cm
ATO-STEP-17X15034mm1.5A28 N·cm
ATO-STEP-17M15040mm1.5A40 N·cm
ATO-STEP-17L18080mm1.8A50 N·cm
ATO-STEP-17C20060mm2A65 N·cm
ATO-STEP-17CM20068mm2A40 N·cm
ATO-STEP-17CL20068mm2A50 N·cm
ATO-STEP-17CC20080mm2A72 N·cm

Nema 17 Stepper Motor Advantages

  1. The rotation angle of the Nema 17 motor is proportional to the input pulses.
  2.  The motor has full torque at standstill (if the windings are energized).
  3.  Precise positioning and repeatability of movement since most stepper motors have an accuracy of 3 – 5% of a step and this error is non cumulative from one step to the next.
  4.  Excellent response to starting, stopping and reversing.
  5.  Extremely reliable since there are no contact brushes in the motor, therefore the life of the motor is mainly dependent on the life of the bearings.
  6.  The Nema 17 motors response to digital input pulses provides open-loop control, making the system simpler and therefore more cost efficient.
  7.  It is possible to achieve very low speed synchronous rotation with a load that is directly coupled to the shaft.
  8.  A wide range of rotational speeds can be realized as the speed is proportional to the frequency of the input pulses.