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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:

Motor
Type
Rated
Voltage
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)
High-Power
(HP) 12 V
12 V 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
Medium-Power
(MP) 12 V
12 V 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
Low-Power
(LP) 12 V
12 V 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
Motor
Type
Rated
Voltage
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)
High-Power
(HP) 6 V
6 V 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
Low-Power
(LP) 6 V
6 V 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.

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.


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