Stepper Motor: Bipolar, 200 Steps/Rev, 57×56mm, 2.5V, 2.8 A/Phase

SKU: POLOLU-1474 Brand: Pololu

This NEMA 23-size hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 2.8 A at 2.5 V, allowing for a holding torque of 13 kg-cm (180 oz-in).

$109.95 AUD, inc GST

$99.95 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Delivered by Mon, 25th of Nov

Quantity Discounts:

5-10 $96.95 (exc GST)
10+ $94.95 (exc GST)

Bipolar stepper motor wires are terminated with bare leads.

Bipolar stepper motor wiring diagram.

This high-torque hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 2.8 A at 2.5 V, allowing for a holding torque of 13 kg-cm (180 oz-in). The motor has four color-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 Pololu recommend using an appropriately powerful bipolar stepper motor driver, such as Pololu's High-Power Stepper Motor Driver 36v4, or Pololu's Tic 36v4 High-Power Stepper Motor Controller. In particular, the Tic makes control easy because it supports six different interfaces (USB, TTL serial, I²C, RC, analog voltages, and quadrature encoder) and is configurable over USB with Pololu's free configuration utility.

NEMA 23 stepper motor (item #1475) mounted with a steel L-bracket for NEMA 23 stepper motors.

Pololu's 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 Pololu 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 × 56 mm, not including the shaft (NEMA 23)
Weight: 0.7 kg (25 oz)
Shaft diameter: 6.35 mm (0.25") “D”
Steps per revolution: 200
Current rating: 2.8 A per coil
Voltage rating: 2.5 V
Resistance: 0.9 O per coil
Holding torque: 13 kg-cm (180 oz-in)
Inductance: 2.5 mH per coil
Lead length: 30 cm (12")
Output shaft supported by two ball bearings

More specifications are available in the datasheet (49k pdf).

Dimensions

The following diagram shows the stepper motor dimensions in mm. The output D-shaft has a 0.25" (6.35 mm) diameter with a section that is flattened by 0.5 mm (note: the diagram below incorrectly lists this flattened width as 6 mm when it is really 5.85 mm). This shaft works with Pololu's 1/4" universal mounting hub and 1/4" scooter wheel adapter.

The inside of a bipolar stepper motor (SOYO NEMA 14-size).

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 SY57STH56-2804A.

People often buy this product together with:

Pololu Universal Aluminum Mounting Hub for 1/4" (6.35mm) Shaft, #4-40 Holes (2-Pack)

Stepper Motor: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase

Steel L-Bracket for NEMA 23 Stepper Motors

Dimensions

Size:	56.4 mm square × 56 mm¹
NEMA size:	23
Weight:	700 g
Shaft diameter:	6.35 mm

General specifications

Shaft type:	1/4 inch "D"
Current rating:	2800 mA²
Voltage rating:	2.5 V
Holding torque:	180 oz·in
Steps per revolution:	200
Resistance:	0.9 Ohm²
Inductance per phase:	2.5 mH
Number of leads:	4
Lead length:	30 cm

Notes:

1: Not including the shaft.
2: Per coil.

File downloads

SY57STH56-2804A stepper motor datasheet (49k pdf)
3D model of the SY57STH56-2804A stepper motor (Pololu item #1474) (3MB step)

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