Mechanical Components » Motors and Gearboxes » Pololu Metal Gearmotors »

24:1 Mini Metal Gearmotor

Pololu item #: 991

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Quantity in stock: 296

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17.95
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13.46

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This high-quality metal gearmotor is a compact (1.26" x 0.63" x 0.63") motor with an enclosed 24:1 metal gearbox. These units have a 0.275"-long, D-shaped output shaft.

Key specs at 6 V: 410 RPM and 70 mA free-run, 4 oz-in (0.3 kg-cm) and 0.42 A stall.

Compare all products in Pololu Metal Gearmotors or 3mm Shaft Gearmotors.

	Description		Specifications (7)		Pictures (4)		Resources (0)		FAQs (0)

Mini gearmotor with bracket and hub.

Gearmotor Dimensions:

This motor has a 0.275" (7 mm) D-shaped metal output shaft that matches the Pololu wheel 32x7mm, Pololu wheel 42x19mm, and Solarbotics RW2 rubber wheel. Alternatively, the hub in the picture can be used to mount custom wheels and mechanisms to the gearmotor’s output shaft.

The face plate has two mounting holes threaded for M2 screws. You can use our custom-designed mini metal gearmotor bracket (pictured to the right) to mount the gearmotor to your project via these mounting holes and the screws that come with the bracket.

The dimension L in the diagram below is 13 mm.

100:1 and 24:1 mini metal gearmotor dimensions (units in mm).

Pololu wheel 32x7mm on a micro metal gearmotor.

Pololu wheel 42x19mm with micro metal gearmotor.

These motors are intended for use at 6 V. In general, these kinds of motors can run at voltages above and below this nominal voltage, so they should comfortably operate in the 3 – 9 V range. Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor.

Pololu metal gearmotors arranged by size from left to right: micro, 100:1 and 24:1 mini, 35:1 mini, and 25:1 20Dx44L mm.

Specs for the metal gearmotors running at 6 V:

gearmotor	gear ratio	free-run RPM	free-run current	stall current	stall torque* (oz-in / kg-cm)	weight (oz / g)
5:1 Micro	5:1	2500	50 mA	360 mA	1 / 0.1	0.35 / 10
10:1 Micro	10:1	1300	40 mA	360 mA	2 / 0.2	0.35 / 10
30:1 Micro	30:1	440	40 mA	360 mA	4 / 0.3	0.35 / 10
50:1 Micro	50:1	250	40 mA	360 mA	6 / 0.4	0.35 / 10
100:1 Micro	100:1	120	40 mA	360 mA	10 / 0.7	0.35 / 10
150:1 Micro	150:1	85	40 mA	360 mA	15 / 1.1	0.35 / 10
210:1 Micro	210:1	60	40 mA	360 mA	19 / 1.3	0.35 / 10
250:1 Micro	250:1	50	30 mA	360 mA	22 / 1.6	0.35 / 10
298:1 Micro	298:1	45	30 mA	360 mA	25 / 1.8	0.35 / 10
5:1 Micro HP	5:1	6000	120 mA	1600 mA	2 / 0.1	0.35 / 10
10:1 Micro HP	10:1	3000	120 mA	1600 mA	4 / 0.3	0.35 / 10
30:1 Micro HP	30:1	1000	120 mA	1600 mA	8 / 0.6	0.35 / 10
50:1 Micro HP	50:1	625	100 mA	1600 mA	15 / 1.0	0.35 / 10
100:1 Micro HP	100:1	320	80 mA	1600 mA	25 / 1.8	0.35 / 10
150:1 Micro HP	150:1	200	70 mA	1600 mA	45 / 3.2	0.35 / 10
210:1 Micro HP	210:1	140	70 mA	1600 mA	65 / 4.7	0.35 / 10
250:1 Micro HP	250:1	120	70 mA	1600 mA	75 / 5.4	0.35 / 10
298:1 Micro HP	298:1	100	70 mA	1600 mA	90 / 6.5	0.35 / 10
24:1 Mini	24:1	410	70 mA	420 mA	4 / 0.3	0.80 / 27
100:1 Mini	100:1	140	90 mA	800 mA	15 / 1.0	0.80 / 27
35:1 Mini	35:1	350	70 mA	1500 mA	35 / 2.5	0.80 / 27
25:1 20Dx42L mm LP	25:1	470	60 mA	580 mA	7 / 0.5	1.70 / 48
25:1 20Dx44L mm	25:1	500	250 mA	3300 mA	40 / 2.9	1.70 / 48
67:1 20Dx45L mm	67:1	210	250 mA	3300 mA	57 / 4.1	1.80 / 51
154:1 20Dx47L mm	154:1	90	250 mA	3300 mA	122 / 8.8	1.85 / 52
19:1 37Dx52L mm	19:1	256	250 mA	2500 mA	40 / 2.9	6.40 / 180
29:1 37Dx52L mm	29:1	175	250 mA	2500 mA	55 / 4	6.40 / 180
50:1 37Dx54L mm	50:1	101	250 mA	2500 mA	85 / 6	6.60 / 187
67:1 37Dx54L mm	67:1	75	250 mA	2500 mA	100 / 7	6.60 / 187
100:1 37Dx57L mm	100:1	50	250 mA	2500 mA	110 / 8	6.80 / 193
122:1 37Dx57L mm	122:1	41	250 mA	2500 mA	125 / 9	6.80 / 193