Stepper Motor NEMA 17 (200 Steps/Rev, 4V, 1200mA, Unipolar/Bipolar)

This hybrid stepping motor can be used as a unipolar or bipolar stepper motor and has a 1.8° step angle (200 steps/revolution). Each phase draws 1200 mA at 4 V, allowing for a holding torque of 3.17 kg-cm (44 oz-in). The motor has six color-coded wires terminated with bare leads.

The 5mm universal mounting hub can be used to mount objects on the stepper motor’s 5mm-diameter output shaft.

Specifications

• Size: 42.3 mm square x 48 mm, not including the shaft (NEMA 17)
• Weight: 350 g (13 oz)
• Shaft diameter: 5 mm “D”
• Steps per revolution: 200
• Current rating: 1200 mA per coil
• Voltage rating: 4 V
• Resistance: 3.3 Ohm per coil
• Holding torque: 3.17 kg-cm (44 oz-in)
• Inductance: 2.8 mH per coil
• Lead length: 12 in

Connections

This stepper motor can be controlled by unipolar or bipolar stepper motor drivers. When used with a unipolar stepper motor driver, all six leads are used. When used with a bipolar stepper motor driver, the center-tap yellow and white wires can be left disconnected (the red-blue pair gives access to one coil and the black-green pair gives access to the other coil). We recommend using this as a bipolar stepper motor if you have a bipolar driver.

Dimensions

The following diagram shows the stepper motor dimensions in mm. The dimension labeled “length” is 48 mm. The output shaft has a length of 24 mm and a diameter of 5 mm. Though not shown in the diagram, the output is a D-shaft with a section that is flattened by 0.5 mm.

Stepper Motor Applications

Stepper motors are generally used in a variety of applications where precise position control is desirable and the cost or complexity of a feedback control system is unwarranted. Here are a few applications where stepper motors are often found:

• Printers
• CNC machines
• 3D printer/prototyping machines
• Laser cutters
• Pick and place machines
• Linear actuators
• Hard drives