This NEMA 11-size hybrid bipolar stepping motor has a 1.8 step angle (200steps/revolution). Each phase draws 670mA at 4.5V, allowing for a holding torque of 950g-cm (13oz-in).

The motor has four colour-coded wires terminated with bare leads: black and green connect to one coil; red and blue connect to the other. It can be controlled by a pair of suitable H-bridges (one for each coil), but we recommend using abipolar stepper motor driver.

Our5mm universal mounting hubcan be used to mount objects on the stepper motors 5mm-diameter output shaft.

Note:This stepper motor is SOYO part number SY28STH45-0674A.

Specifications

• Size: 28mmsquare45mm, not including the shaft (NEMA 11)
• Weight: 140g (5oz)
• Shaft diameter: 5mm D
• Steps per revolution: 200
• Current rating: 670mA per coil
• Voltage rating: 4.5V
• Resistance: 6.8 per coil
• Holding torque: 950g-cm (13oz-in)
• Inductance: 4.9mH per coil
• Lead length: 30cm (12)
• Output shaft supported by two ball bearings

More specifications are available in thedatasheet(45k pdf).

Dimensions

The product images show the stepper motor dimensions in mm. The dimension labelled Length is 45 mm. The output shaft has a length of 20 mm and a 5 mm diameter with a section that is flattened by 0.5 mm. This shaft works with our5mm universal mounting hub.

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 (e.g. RepRap)
• Laser cutters
• Pick and place machines
• Linear actuators
• Hard drives

Resources

• SY28STH45-0674A stepper motor datasheet
• 3D Model