This gearmotor consists of a medium-power, 12 V brushed DC motor combined with a 4.4:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 211.2 counts per revolution of the gearbox’s output shaft. 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 | no-load performance | stall extrapolation |
|---|---|---|
| 12 V | 1700 RPM, 200 mA |
0.8 kg⋅cm (11 oz⋅in), 2.1 A |
Dimensions
The diagram below shows the dimensions of the 25D mm line of gearmotors (units are mm over [inches]).
 |
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Dimensions of the Pololu 25D mm metal gearmotors with encoders. Units are mm over [inches]. |
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Warning: Do not screw too far into the mounting holes as the screws can hit the gears. We recommend screwing no further than 6 mm (0.24″) into the screw hole.
| Size: | 25D x 63L mm1 |
|---|---|
| Weight: | 95 g |
| Shaft diameter: | 4 mm |
General specifications
| Gear ratio: | 4.4:1 |
|---|---|
| No-load speed @ 12V: | 1700 rpm |
| No-load current @ 12V: | 200 mA |
| Stall current @ 12V: | 2100 mA |
| Stall torque @ 12V: | 11 oz·in |
| No-load speed @ 6V: | 850 rpm2 |
| Stall current @ 6V: | 1050 mA2 |
| Stall torque @ 6V: | 5 oz·in2 |
| Motor type: | 2.1A stall @ 12V (MP 12V) |
| Lead length: | 8 in3 |
| Encoders?: | Y |
Notes:
- 1. Length measurement is from gearbox face plate to back of encoder cap (it does not include the output 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.
Fast Shipping & Professional Packing
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Note: Orders that contain more than one product will be assigned a distinct processing time dependent on the particular item.
We will inspect each and every one of the products before they are shipped. The majority of orders are shipped within 48 hours. The delivery time will be between 3-7 working days.
Returns
The inventory is always changing, and not fully managed by us because of the involvement of many parties including the factory and our warehouse. The stock can change at any moment. Please be aware that it's possible for your order to be out of stock after you have made the order.
Our policy is valid for a period of 30 days. If 30 days have passed in the past since you purchased and we are unable to offer you a return or exchange.
To be eligible for a refund, your product must be unopened and in the same condition as you received it in. It must also be returned in its original packaging.
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