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




$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 Properties
  • 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.

Stepper Motor and Controller Primer

Documentation [Hide]

Related Products [Hide]


Standard LED

Standard sized diffused T1-3/4 LEDs, great for indicators. Available in green, red, yellow, white and blue.

$0.35 USD


OpenBeam Button Head Socket Cap bolts/screws - 100 Pack

100 pack of button head socket cap screws for use with OpenBeam.

$7.00 USD


42BYGHW811 NEMA-17 Bipolar 48mm Stepper

This motor is a larger NEMA-17 motor that produces a whopping 4800g-cm of holding torque.

$14.28 USD


Arduino USB Board (Uno R3)

The Arduino Uno is the all-new replacement for the favourite and popular Arduino Duemilanove. Now shipping R3!

$29.45 USD


VoiceShield Kit

The Voice Shield™ (VS) is an analog audio shield for the Arduino that allows you to play audio sound byte.

$55.95 USD


Resistor Bundle Set 1: 100ohm, 470ohm, 1k, 2.2k

10 resistors each of 100ohm, 470ohm, 1k, and 2.2k

$2.20 USD


Arduino Pro Mini 328 - 5V/16MHz

You need to wedge an Arduino into a really tiny spot? Simple - just use a SMD '328 IC. Oh... you want a reset, and voltage regulator too? Why didn't you say so!

$9.95 USD


2-1/4" Round Mini Speaker 8 Ohm

2-1/4" round, 8 ohm, 0.25 watt general purpose replacement speaker. Paper cone, Alnico magnet. Unit comes with 6" wire lead attached.

$1.95 USD


Female Socket strip- 6 per

Female Socket Strip - 6 per Strip, gold flash surface, 0.1" spacing

$0.23 USD


OpenBeam Extrusion 1000mm Length

This is the 'beam' part of 'Open Beam'. This is the central building component for the system, and is available in both black and silver.

$10.00 USD





Remember Me

Forgot Your Password?

Don't Have an Account?
Sign Up!