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4751-POLOLU 19:1 Metal Gearmotor 530 RPM 37Dx68L mm 12V with 64 CPR Encoder (Helical Pinion)
This gearmotor is a powerful 12V brushed DC motor with a 18.75:1 metal gearbox and an integrated quadrature encoder that provides a resolution of 64 counts per revolution of the motor shaft, which corresponds to 1200 counts per revolution of the gearbox’s output shaft. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.
Key specs at 12 V: 530RPM and 200 mA free-run, 120 oz-in (8.5 kg-cm) and 5.5 A stall.
Dimensions
| Size: | 37D x 68L mm1 |
|---|---|
| Weight: | 215 g |
| Shaft diameter: | 6 mm |
General specifications
| Gear ratio: | 18.75:1 |
|---|---|
| Free-run speed @ 6V: | 256 rpm2 |
| Free-run current @ 6V: | 250 mA2 |
| Stall current @ 6V: | 2500 mA2 |
| Stall torque @ 6V: | 42 oz·in2 |
| Free-run speed @ 12V: | 530 rpm |
| Free-run current @ 12V: | 200 mA |
| Stall current @ 12V: | 5500 mA |
| Stall torque @ 12V: | 84 oz·in |
| Lead length: | 11 in |
Notes:
- 1. Length measurement does not include gearbox shaft or the raised area immediately around it.
- 2. This motor will run at 6 V but is intended for operation at 12 V.
WARNING
