35STH40 NEMA-14 Bipolar 40mm Stepper - Dual Shaft


16.00 USD
$16.00 ea.

This motor is about half as small as our NEMA-17 Stepper and as a result only needs about half the power. Compared to the other NEMA-14 stepper we carry, it's a little longer but has the option to mount an encoder to the rear shaft!

Description [Hide]

Stepper motors are different from DC motors in that they have to be pulsed in set increments in order to move. That means you can't simply hook them up to a power supply to make them go, but they have other advantages, like accurate positioning (1 pulse=1 increment of movement), and lots of low-speed torque (ability to twist things). To control this type of motor you'll need a circuit that has 4 or more mosfets, a dual H-bridge, or a specifically designed stepper driver.

Product Features

  • Good torque and high speed
  • 1.8° Step angle
  • NEMA-14 bipolar 4-wire
  • Rear shaft exposed for use with encoders

The following table shows how to connect the motor wires to the board connectors to produce a clockwise rotation in the stepper motor when increasing position. To wire for counter-clockwise rotation when increasing position, reverse the yellow and blue wires.

  • Board Connector A is Black
  • Board Connector B is Green
  • Board Connector C is Red
  • Board Connector D is Blue

Please Note: Connecting the motor directly to a power supply will destroy the motor and void the warranty. If you want to check your motor make sure it is connected to a constant current / chopper drive controller.


  • Motor Type    Bipolar Stepper
  • Step Angle    1.8°
  • Step Accuracy    5 %
  • Holding Torque    1.4 kg·cm
  • Rated Torque    1.2 kg·cm
  • Maximum Speed (w/1063 Motor Controller)    525 RPM
  • Maximum Speed (w/1067 Motor Controller)    2340 RPM

Electrical Properties

  • Recommended Voltage    12 V DC
  • Rated Current    1 A
  • Coil Resistance    2.7 Ω

Physical Properties

  • Motor Height    40 mm (not including shaft)
  • Motor Length and Width    35.2 mm
  • Front Shaft Diameter    5 mm
  • Front Shaft Length    21 mm
  • Rear Shaft Diameter    3.8mm
  • Rear Shaft Length    12 mm
  • Mounting Plate Size    NEMA - 14
  • Weight    198 g
  • Number of Leads    4
  • Wire Length    300

The rear shaft of this motor can be equipped with the HKT22 Optical Encoder for applications where you need to keep track of the exact position, velocity, or acceleration of the motor.


Documentation [Hide]

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