Mechanical Components » Motors and Gearboxes » Pololu Metal Gearmotors »
25D Metal Gearmotors
These cylindrical brushed DC gearmotors are available in a wide range of gear ratios and with five different motors (two power levels of 6V motors and three power levels of 12V motors). The gearmotors all have the same 25 mm diameter body and 4 mm diameter gearbox output shaft, so it is generally easy to swap one version for another if your design requirements change (though the length of the gearbox tends to increase with the gear ratio). All versions are also available with an integrated 48 CPR quadrature encoder on the motor shaft.
Alternatives available with variations in these parameter(s): gear ratio motor type encoders? Select variant…
Please see the 25D metal gearmotor comparison table for detailed specifications of all our 25D metal gearmotors. This dynamically-sortable table can help you find the version that offers the best combination of speed, torque, and current draw for your particular application. A more basic comparison table is available below:
| Rated Voltage |
Motor Type |
Stall Current |
No-Load Current |
Gear Ratio | No-Load Speed (RPM) |
Extrapolated Stall Torque |
Max Power (W) |
 Without Encoder |
 With Encoder |
|
|---|---|---|---|---|---|---|---|---|---|---|
| (kg ⋅ cm) | (oz ⋅ in) | |||||||||
| 12 V | High-Power (HP) |
5.0 A | 250 mA w/o encoder 300 mA with encoder |
1:1 (no gearbox) | 10,000 | 0.4 | 5.5 | 10 | – | item #4840 |
| 4.4:1 | 2200 | 1.7 | 24 | 9.4 | item #3201 | item #4841 | ||||
| 9.7:1 | 1000 | 3.9 | 54 | 10 | item #3202 | item #4842 | ||||
| 20.4:1 | 500 | 7.4 | 100 | 9.4 | item #3203 | item #4843 | ||||
| 34:1 | 300 | 11 | 150 | 8.9 | item #3204 | item #4844 | ||||
| 47:1 | 220 | 15 | 210 | 8.4 | item #3205 | item #4845 | ||||
| 75:1 | 130 | 22 | 310 | – | item #3206 | item #4846 | ||||
| 99:1 | 100 | 29 | 400 | – | item #3207 | item #4847 | ||||
| 12 V | Medium-Power (MP) |
1.8 A | 80 mA w/o encoder 100 mA with encoder |
1:1 (no gearbox) | 8200 | 0.17 | 2.4 | 3.5 | – | item #4860 |
| 4.4:1 | 1800 | 0.71 | 10 | 3.2 | item #3225 | item #4861 | ||||
| 9.7:1 | 800 | 1.7 | 24 | 3.4 | item #3226 | item #4862 | ||||
| 20.4:1 | 380 | 3.2 | 44 | 3.1 | item #3227 | item #4863 | ||||
| 34:1 | 230 | 4.7 | 65 | 2.8 | item #3228 | item #4864 | ||||
| 47:1 | 170 | 6.4 | 89 | 2.8 | item #3229 | item #4865 | ||||
| 75:1 | 100 | 8.5 | 120 | 2.3 | item #3230 | item #4866 | ||||
| 99:1 | 79 | 11 | 150 | 2.3 | item #3231 | item #4867 | ||||
| 172:1 | 46 | 18 | 250 | 2.1 | item #3232 | item #4868 | ||||
| 227:1 | 35 | 24 | 330 | – | item #3233 | item #4869 | ||||
| 12 V | Low-Power (LP) |
0.9 A | 50 mA w/o encoder 60 mA with encoder |
1:1 (no gearbox) | 5600 | 0.14 | 1.9 | 1.8 | – | item #4880 |
| 4.4:1 | 1200 | 0.53 | 7.4 | 1.7 | item #3249 | item #4881 | ||||
| 9.7:1 | 580 | 1.3 | 18 | 1.8 | item #3250 | item #4882 | ||||
| 20.4:1 | 280 | 2.4 | 33 | 1.7 | item #3251 | item #4883 | ||||
| 34:1 | 170 | 3.7 | 51 | 1.6 | item #3252 | item #4884 | ||||
| 47:1 | 120 | 4.8 | 67 | 1.4 | item #3253 | item #4885 | ||||
| 75:1 | 75 | 7.1 | 99 | 1.4 | item #3254 | item #4886 | ||||
| 99:1 | 57 | 8.7 | 120 | 1.2 | item #3255 | item #4887 | ||||
| 172:1 | 33 | 13 | 180 | 1.1 | item #3256 | item #4888 | ||||
| 227:1 | 25 | 16 | 220 | 1.0 | item #3257 | item #4889 | ||||
| 378:1 | 15 | 23 | 320 | – | item #3258 | item #4890 | ||||
| 6 V | High-Power (HP) |
6.0 A | 420 mA w/o encoder 500 mA with encoder |
1:1 (no gearbox) | 10,000 | 0.3 | 4 | 7 | – | item #4800 |
| 4.4:1 | 2200 | 1.2 | 17 | 6.7 | item #1570 | item #4801 | ||||
| 9.7:1 | 1000 | 2.3 | 32 | 5.9 | item #1571 | item #4802 | ||||
| 20.4:1 | 480 | 4.8 | 67 | 5.9 | item #1572 | item #4803 | ||||
| 34:1 | 290 | 6.8 | 94 | 5.1 | item #1573 | item #4804 | ||||
| 47:1 | 210 | 9.1 | 130 | 4.9 | item #1574 | item #4805 | ||||
| 75:1 | 130 | 14 | 190 | 4.5 | item #1575 | item #4806 | ||||
| 99:1 | 99 | 15 | 210 | 3.9 | item #1576 | item #4807 | ||||
| 172:1 | 57 | 27 | 380 | – | item #1577 | item #4808 | ||||
| 6 V | Low-Power (LP) |
2.0 A | 100 mA w/o encoder 120 mA with encoder |
1:1 (no gearbox) | 6200 | 0.15 | 2.1 | 2.1 | – | item #4820 |
| 4.4:1 | 1300 | 0.63 | 8.7 | 2.1 | item #1581 | item #4821 | ||||
| 9.7:1 | 630 | 1.3 | 18 | 1.9 | item #1582 | item #4822 | ||||
| 20.4:1 | 290 | 2.5 | 35 | 1.9 | item #1583 | item #4823 | ||||
| 34:1 | 180 | 3.9 | 54 | 1.7 | item #1584 | item #4824 | ||||
| 47:1 | 130 | 4.8 | 67 | 1.5 | item #1585 | item #4825 | ||||
| 75:1 | 80 | 7.5 | 100 | 1.5 | item #1586 | item #4826 | ||||
| 99:1 | 61 | 9.1 | 130 | 1.4 | item #1587 | item #4827 | ||||
| 172:1 | 35 | 14 | 190 | 1.2 | item #1588 | item #4828 | ||||
| 227:1 | 27 | 17 | 240 | 1.1 | item #1589 | item #4829 | ||||
| 378:1 | 16 | 25 | 350 | – | item #1590 | item #4830 | ||||
| 499:1 | 12 | 31 | 430 | – | item #1591 | item #4831 | ||||
Note: The listed stall torques and currents are theoretical extrapolations; units will typically stall well before these points as the motors heat up. Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. The recommended upper limit for continuously applied loads is 4 kg⋅cm (55 oz⋅in), and the recommended upper limit for intermittently permissible torque is 8 kg⋅cm (110 oz⋅in). Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes; a general recommendation for brushed DC motor operation is 25% or less of the stall current.
Compare all products in this category
Subcategories
These 25D mm gearmotors have high-power (HP), 12 V motors with a stall current of 5 A and a typical free-run current of 300 mA.
These 25D mm gearmotors have medium-power (MP), 12 V motors with a stall current of 1.8 A and a typical free-run current of 100 mA.
These 25D mm gearmotors have low-power (LP), 12 V motors with a stall current of 0.9 A and a typical free-run current of 60 mA.
These 25D mm gearmotors have high-power (HP), 6 V motors with a stall current of 6 A and a typical free-run current of 500 mA.
These 25D mm gearmotors have low-power (LP), 6 V motors with a stall current of 2 A and a typical free-run current of 120 mA.
Related products
Home | Forum | Blog | Support | Ordering Information | Wish Lists | Distributors | BIG Order Form | About | Contact
© 2001–2022 Pololu Corporation
