Stepper Motor: Unipolar/Bipolar, 200 Steps/Rev, 57x41mm, 5.7V, 1 A/Phase
6-lead, unipolar/bipolar stepper motor wires are terminated with bare leads.
6-lead, unipolar/bipolar stepper motor wiring diagram.
This high-torque hybrid stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 1 A at 5.7 V, allowing for a holding torque of 4 kg-cm (55 oz-in). The motor has six color-coded wires terminated with bare leads that allow it to be controlled by both unipolar and 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 it as a bipolar stepper motor.
NEMA 23 stepper motor (item #1475) mounted with a steel L-bracket for NEMA 23 stepper motors.
Our 1/4″ universal mounting hub and 1/4″ scooter wheel adapter can be used to mount objects on the stepper motor’s 1/4″-diameter output shaft, and we carry a NEMA 23 steel bracket for securely mounting this stepper motor to a flat surface (the picture above shows this bracket being used with a taller NEMA 23 stepper motor).
- Size: 56.4 mm square × 41 mm, not including the shaft (NEMA 23)
- Weight: 450 g (16 oz)
- Shaft diameter: 6.35 mm (0.25″) “D”
- Steps per revolution: 200
- Current rating: 1 A per coil
- Voltage rating: 5.7 V
- Resistance: 5.7 Ω per coil
- Holding torque: 4 kg-cm (55 oz-in)
- Inductance: 5.4 mH per coil
- Lead length: 30 cm (12″)
- Output shaft supported by two ball bearings
More specifications are available in the datasheet (50k pdf).
The following diagram shows the stepper motor dimensions in mm. The output shaft has a 0.25″ (6.35 mm) diameter. Though not shown in the diagram, the output is a D-shaft with a section that is flattened by 0.5 mm. This shaft works with our 1/4″ universal mounting hub and 1/4″ scooter wheel adapter.
The inside of a bipolar stepper motor.
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:
- CNC machines
- 3D printer/prototyping machines (e.g. RepRap)
- Laser cutters
- Pick and place machines
- Linear actuators
- Hard drives
Pololu’s assortment of stepper motors.
Note: This stepper motor is SOYO part number SY57STH41-1006A.