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Stepper Motor: Unipolar/Bipolar, 200 Steps/Rev, 57
- Manufacturer: Pololu
- Order number: EXP-R25-204
- Manufacturer part number: 1473
- country of origin: CN
- HS code: 85011099
- Weight (kg): 0.74
This high-torque hybrid stepping motor has a 1.8° step angle (200 steps/revolution). Each phase... more
This high-torque hybrid stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 2 A at 3.6 V, allowing for a holding torque of 9 kg-cm (125 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.
Specifications:
- Size: 56.4 mm square × 56 mm, not including the shaft (NEMA 23)
- Weight: 0.7 kg (25 oz)
- Shaft diameter: 1/4? (6.35 mm) ?D?
- Steps per revolution: 200
- Current rating: 2 A per coil
- Voltage rating: 3.6 V
- Resistance: 1.8 Ohm per coil
- Holding torque: 9 kg-cm (125 oz-in)
- Inductance: 2.5 mH per coil
- Lead length: 30cm
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).

Stepper Motor Applications:
- Printers
- CNC machines
- 3D printer/prototyping machines
- Laser cutters
- Pick and place machines
- Linear actuators
- Hard drives
Steps: | 200 |
Leads: | 6 |
Motor length (mm): | 56 |
Shaft: | D-Schaft |
NEMA: | 23 |
Output shaft (mm): | 20 |
Holding torque: | 88 |
Voltage rating (V): | 3,6 |
Current rating (A): | 2 |
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