Stepper Motor: Bipolar, 200 Steps/Rev, 35×26mm, 7.4V, 0.28 A/Phase
- Order number: Pololu-1207
- Manufacturer product ID: 1207
This hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 280 mA at 7.4 V, allowing for a holding torque of 650 g-cm (9 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 we recommend using a bipolar stepper motor driver.
Our 5mm universal mounting hub can be used to mount objects on the stepper motor’s 5mm-diameter output shaft.
Specifications
- Size: 35 mm square × 26 mm, not including the shaft (NEMA 14)
- Weight: 130 g (4.5 oz)
- Shaft diameter: 5 mm
- Steps per revolution: 200
- Current rating: 280 mA per coil
- Voltage rating: 7.4 V
- Resistance: 26 Ohm per coil
- Holding torque: 650 g-cm (9 oz-in)
- Inductance: 19.2 mH per coil
- Lead length: 12 in
 |
|
|
Dimensions
The following diagram shows the stepper motor dimensions in mm. The dimension labeled “length” is 26 mm. The output shaft has a length of 21 mm and a diameter of 5 mm. Though not shown in the diagram, the output is a D-shaft with a section that is flattened by 0.5 mm.
 |
  |
| 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
- Laser cutters
- Pick and place machines
- Linear actuators
- Hard drives
 |
| Bipolar stepper motors; from left to right: 20×30, 28×32, 28×45, 35×26, 35×28, 35×36mm. |
|---|