Main Content

A stepper motor (or step motor) is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller).

Bipolar motors have a single winding per phase. The current in a winding needs to be reversed in order to reverse a magnetic pole, so the driving circuit must be more complicated, typically with an H-bridge arrangement (however there are several off-the-shelf driver chips available to make this a simple affair). There are two leads per phase, none are common.

Windings are better utilized hence they are more powerful than a unipolar motor of the same weight. This is due to the physical space occupied by the windings. A unipolar motor has twice the amount of wire in the same space, but only half used at any point in time, hence is 50% efficient (or approximately 70% of the torque output available). Though a bipolar stepper motor is more complicated to drive, the abundance of driver chips means this is much less difficult to achieve.

This stepper motor is robust has high speed and high torque hence the stepper motor is most suitable for robots which require high speed and torque.


  • Very High Torque
  • Bipolar 4-wire
  • Step angle: 1.8 degree

Motor Connections

Wire Color Connection
Green Coil  A(-)
Black Coil  A(+)
Blue Coil  B(-)
Red Coil  B(+)


Please Login To Review This Product
There are no project for this product.

Bipolar Stepper Motor

Product Code: (H-ELC-MOT-STP-1)


in stock


General Specifications
Shaft Diameter 5 mm
Step Accuracy 5%
Step Angle 1.8 deg
Steps per Revolution 200
Holding Torque 44
Inductance per Phase 1.8mH
Motor Type Bipolar Stepper Motor
Number of Leads 4
Phase Current 2.5A
Power Supply
Phase Voltage 3.1V