Pololu 47:1 Metal Gearmotor 25D x 64L mm MP 12V with 48 CPR Encoder (No End Cap)
This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 46.85:1 metal spur gearbox, with an integrated 48 CPR quadrature encoder on the motor shaft, which provides 2248.86 counts per revolution of the gearbox’s output shaft.
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The gearmotor is cylindrical, with a diameter just under 25 mm, and the D-shaped output shaft is 4 mm in diameter and extends 12.5 mm from the face plate of the gearbox.
Key specifications :
Voltage : 12 V
No-load Performance : 160 RPM, 200 mA
Stall Extrapolation : 6 kg.cm (85 oz.in), 2.1 A
Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. For these gearboxes, the recommended upper limit for instantaneous torque is 15 kg-cm (200 oz-in); we strongly advise keeping applied loads well under this limit. Stalls can also result in rapid (potentially on the order of a second) thermal damage to the motor windings and brushes, especially for the versions that use high-power (HP) motors; a general recommendation for brushed DC motor operation is 25% or less of the stall current.
| Size: | 25D x 64L mm¹ |
| Weight: | 101 g |
| Shaft Diameter: | 4mm |
| Gear Ratio: | 46.85:1 |
| No-load speed @ 12V: | 160 rpm |
| No-load current @ 12V: | 200 mA |
| Stall current @ 12V: | 2100 mA |
| Stall torque @ 12V: | 85 oz·in |
| No-load speed @ 6V: | 80 rpm² |
| Stall current @ 6V: | 1050 mA² |
| Stall torque @ 6V: | 42 oz·in² |
| Motor type: | 2.1A stall @ 12V (MP 12V) |
| Lead length: | 8 in³ |
Notes:
1. Length does not include the motor shaft. See dimension diagram for details.
2. This motor will run at 6 V but is intended for operation at 12 V.
3. May vary by a few inches.
