These tiny brushed DC gearmotors are available in a wide range of gear ratios?from 5:1 up to 1000:1?and with five different motors: high-power 6 V and 12 V motors with long-life carbon brushes (HPCB), and high-power (HP), medium power (MP), and low power (LP) 6 V motors with shorter-life precious metal brushes. The 6 V and 12 V HPCB motors offer the same performance at their respective nominal voltages, just with the 12 V motor drawing half the current of the 6 V motor. The 6 V HPCB and 6 V HP motors are identical except for their brushes, which only affect the lifetime of the motor.
The HPCB versions (shown on the left in the picture below) can be differentiated from versions with precious metal brushes (shown on the right) by their copper-colored terminals. Note that the HPCB terminals are 0.5 mm wider than those on the other micro metal gearmotor versions (2 mm vs. 1.5 mm), and they are about 1 mm closer together (6 mm vs. 7 mm).
With the exception of the 1000:1 gear ratio versions, all of the micro metal gearmotors have the same physical dimensions, so one version can be easily swapped for another if your design requirements change.
Versions of these gearmotors are also available with an additional 1 mm-diameter output shaft that protrudes from the rear of the motor. This 4.5 mm-long rear shaft rotates at the same speed as the input to the gearbox and offers a way to add an encoder, such as our magnetic encoder for micro metal gearmotors (see the picture on the right), to provide motor speed or position feedback.
Please see the micro metal gearmotor datasheet (2MB pdf) for more information, including detailed performance graphs for each micro metal gearmotor version. You can also use our dynamically sortable micro metal gearmotor comparison table for search for the gearmotor that offers the best blend of speed, torque, and current-draw for your particular application. A more basic comparison table is available below.
|Size:||10 × 12 × 26 mm1|
|Shaft diameter:||3 mm2|
|Free-run speed @ 6V:||625 rpm|
|Free-run current @ 6V:||120 mA|
|Stall current @ 6V:||1600 mA|
|Stall torque @ 6V:||15 oz·in|
|Extended motor shaft?:||N|
|Long-life carbon brushes?:||Y|
|Motor type:||1.6A stall @ 6V (HPCB 6V - carbon brush)|
- 1 Output shaft adds 9 mm to the 26 mm length.
- 2 D shaft.
1x Pololu 50:1 Micro Metal Gearmotor HPCB 6V