6-lead, unipolar/bipolar stepper motor wires are terminated with bare leads.

6-lead, unipolar/bipolar stepper motor wiring diagram.

Overview

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).

Specifications

  • 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).

Dimensions

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:

  • Printers
  • 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.


Specifications

Dimensions

Size: 56.4 mm square × 41 mm1
NEMA size: 23
Weight: 450 g
Shaft diameter: 6.35 mm

General specifications

Shaft type: 1/4 inch "D"
Current rating: 1000 mA2
Voltage rating: 5.7 V
Holding torque: 55 oz·in
Steps per revolution: 200
Resistance: 5.7 Ohm2
Inductance per phase: 5.4 mH
Number of leads: 6
Lead length: 30 cm

Notes:

1
Not including the shaft.
2
Per coil.

Resources

File downloads

SY57STH41-1006A stepper motor datasheet (50k pdf)

(PL-1476)

SKU PL-1476
Brand Pololu

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