25D mm Gearmotors

Gear Ratio	No-Load Speed @ 6 V	Stall Torque @ 6 V	Stall Current @ 6 V	With Encoder	Without Encoder
4.4:1	2020 RPM	8 oz-in	6 A		25Dx48L mm HP
	1280 RPM	5 oz-in	2.2 A		25Dx48L mm
9.7:1	1010 RPM	17 oz-in	6 A	25Dx48L mm HP	25Dx48L mm HP
	580 RPM	11 oz-in	2.2 A	25Dx48L mm	25Dx48L mm
20.4:1	480 RPM	36 oz-in	6 A		25Dx50L mm HP
	275 RPM	24 oz-in	2.2 A		25Dx50L mm
34:1	285 RPM	60 oz-in	6 A	25Dx52L mm HP	25Dx52L mm HP
	165 RPM	40 oz-in	2.2 A	25Dx52L mm	25Dx52L mm
47:1	210 RPM	80 oz-in	6 A	25Dx52L mm HP	25Dx52L mm HP
	120 RPM	50 oz-in	2.2 A	25Dx52L mm	25Dx52L mm
75:1	130 RPM	130 oz-in	6 A	25Dx54L mm HP	25Dx54L mm HP
	75 RPM	85 oz-in	2.2 A	25Dx54L mm	25Dx54L mm
99:1	100 RPM	160 oz-in	6 A		25Dx54L mm HP
	57 RPM	110 oz-in	2.2 A		25Dx54L mm
172:1	57 RPM	260 oz-in	6 A		25Dx56L mm HP
	33 RPM	170 oz-in	2.2 A	25Dx56L mm	25Dx56L mm
227:1	25 RPM	220 oz-in	2.2 A		25Dx56L mm
378:1	15 RPM	250 oz-in	2.2 A		25Dx58L mm
499:1	12 RPM	300 oz-in	2.2 A		25Dx58L mm

Note: At some of the higher gear ratios, these motors can generate enough torque to damage themselves. Any torque greater than about 250 oz-in (18 kg-cm) is likely to damage the gearbox, so we recommend that you avoid stalling the 172:1 HP, 227:1, 378:1, and 499:1 versions of these motors at 6 V.

Compare all products in this category

	Pololu item #: 1570 Price: $21.95 Quantity:
4.4:1 Metal Gearmotor 25Dx48L mm HP This cylindrical, 1.89" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 4.4:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor. Key specs at 6 V: 2220 RPM and 450 mA free-run, 8 oz-in (0.58 kg-cm) and 6 A stall.

	Pololu item #: 1581 Price: $19.95 Quantity:
4.4:1 Metal Gearmotor 25Dx48L mm This cylindrical, 1.89" x 0.98" x 0.98" brushed DC gearmotor with a 4.4:1 metal gearbox is a lower-current alternative to the HP version. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Key specs at 6 V: 1280 RPM and 80 mA free-run, 5 oz-in (0.36 kg-cm) and 2.2 A stall.

	Pololu item #: 1571 Price: $21.95 Quantity:
9.7:1 Metal Gearmotor 25Dx48L mm HP This cylindrical, 1.89" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 9.7:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor. Key specs at 6 V: 1010 RPM and 450 mA free-run, 17 oz-in (1.2 kg-cm) and 6 A stall.

	Pololu item #: 2271 Price: $36.95 Quantity:
9.7:1 Metal Gearmotor 25Dx48L mm HP with 48 CPR Encoder This cylindrical, 2.38" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 9.68:1 metal gearbox to deliver a lot of power in a relatively small package. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 465 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor and a version without an encoder. Key specs at 6 V: 1010 RPM and 450 mA free-run, 17 oz-in (1.2 kg-cm) and 6 A stall.

	Pololu item #: 1582 Price: $19.95 Quantity:
9.7:1 Metal Gearmotor 25Dx48L mm This cylindrical, 1.89" x 0.98" x 0.98" brushed DC gearmotor with a 9.7:1 metal gearbox is a lower-current alternative to the HP version. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Key specs at 6 V: 580 RPM and 80 mA free-run, 11 oz-in (0.79 kg-cm) and 2.2 A stall.

	Pololu item #: 2282 Price: $34.95 Quantity:
9.7:1 Metal Gearmotor 25Dx48L mm with 48 CPR Encoder This cylindrical, 2.38" x 0.98" x 0.98" brushed DC gearmotor with a 9.68:1 metal gearbox is a lower-current alternative to the HP version. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 465 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder. Key specs at 6 V: 580 RPM and 80 mA free-run, 11 oz-in (0.79 kg-cm) and 2.2 A stall.

	Pololu item #: 1572 Price: $21.95 Quantity:
20.4:1 Metal Gearmotor 25Dx50L mm HP This cylindrical, 1.97" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 20.4:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor. Key specs at 6 V: 480 RPM and 450 mA free-run, 36 oz-in (2.6 kg-cm) and 6 A stall.

	Pololu item #: 1583 Price: $19.95 Quantity:
20.4:1 Metal Gearmotor 25Dx50L mm This cylindrical, 1.97" x 0.98" x 0.98" brushed DC gearmotor with a 20.4:1 metal gearbox is a lower-current alternative to the HP version. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Key specs at 6 V: 275 RPM and 80 mA free-run, 24 oz-in (1.7 kg-cm) and 2.2 A stall.

	Pololu item #: 1573 Price: $21.95 Quantity:
34:1 Metal Gearmotor 25Dx52L mm HP This cylindrical, 2.05" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 34:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This is the same motor used on the Dagu Wild Thumper 6WD all-terrain chassis 34:1. We also carry a lower-power version of this gearmotor and a version with an encoder. Key specs at 6 V: 285 RPM and 450 mA free-run, 60 oz-in (4.3 kg-cm) and 6 A stall.

	Pololu item #: 2273 Price: $36.95 Quantity:
34:1 Metal Gearmotor 25Dx52L mm HP with 48 CPR Encoder This cylindrical, 2.54" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 34.014:1 metal gearbox to deliver a lot of power in a relatively small package. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 1633 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor and a version without an encoder. Key specs at 6 V: 285 RPM and 450 mA free-run, 60 oz-in (4.3 kg-cm) and 6 A stall.

	Pololu item #: 1584 Price: $19.95 Quantity:
34:1 Metal Gearmotor 25Dx52L mm This cylindrical, 2.05" x 0.98" x 0.98" brushed DC gearmotor with a 34:1 metal gearbox is a lower-current alternative to the HP version. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available with an encoder. Key specs at 6 V: 165 RPM and 80 mA free-run, 40 oz-in (2.9 kg-cm) and 2.2 A stall.

	Pololu item #: 2284 Price: $34.95 Temporarily out of stock. See product page to backorder.
34:1 Metal Gearmotor 25Dx52L mm with 48 CPR Encoder This cylindrical, 2.54" x 0.98" x 0.98" brushed DC gearmotor with a 34.014:1 metal gearbox is a lower-current alternative to the HP version. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 1633 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder. Key specs at 6 V: 165 RPM and 80 mA free-run, 40 oz-in (2.9 kg-cm) and 2.2 A stall.

	Pololu item #: 1574 Price: $21.95 Quantity:
47:1 Metal Gearmotor 25Dx52L mm HP This cylindrical, 2.05" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 47:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor. Key specs at 6 V: 210 RPM and 450 mA free-run, 80 oz-in (5.8 kg-cm) and 6 A stall.

	Pololu item #: 2274 Price: $36.95 Quantity:
47:1 Metal Gearmotor 25Dx52L mm HP with 48 CPR Encoder This cylindrical, 2.54" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 46.851:1 metal gearbox to deliver a lot of power in a relatively small package. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 2249 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor and a version without an encoder. Key specs at 6 V: 210 RPM and 450 mA free-run, 80 oz-in (5.8 kg-cm) and 6 A stall.

	Pololu item #: 1585 Price: $19.95 Quantity:
47:1 Metal Gearmotor 25Dx52L mm This cylindrical, 2.05" x 0.98" x 0.98" brushed DC gearmotor with a 47:1 metal gearbox is a lower-current alternative to the HP version. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Key specs at 6 V: 120 RPM and 80 mA free-run, 50 oz-in (3.6 kg-cm) and 2.2 A stall.

	Pololu item #: 2285 Price: $34.95 Quantity:
47:1 Metal Gearmotor 25Dx52L mm with 48 CPR Encoder This cylindrical, 2.54" x 0.98" x 0.98" brushed DC gearmotor with a 46.851:1 metal gearbox is a lower-current alternative to the HP version. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 2249 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder. Key specs at 6 V: 120 RPM and 80 mA free-run, 50 oz-in (3.6 kg-cm) and 2.2 A stall.

	Pololu item #: 1575 Price: $21.95 Quantity:
75:1 Metal Gearmotor 25Dx54L mm HP This cylindrical, 2.13" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 75:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This is the same motor used on the Dagu Wild Thumper 6WD all-terrain chassis 75:1. We also carry a lower-power version of this gearmotor and a version with an encoder. Key specs at 6 V: 130 RPM and 450 mA free-run, 130 oz-in (9.4 kg-cm) and 6 A stall.

	Pololu item #: 2275 Price: $36.95 Quantity:
75:1 Metal Gearmotor 25Dx54L mm HP with 48 CPR Encoder This cylindrical, 2.62" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 74.83:1 metal gearbox to deliver a lot of power in a relatively small package. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 3592 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor and a version without an encoder. Key specs at 6 V: 130 RPM and 450 mA free-run, 130 oz-in (9.4 kg-cm) and 6 A stall.

	Pololu item #: 1586 Price: $19.95 Quantity:
75:1 Metal Gearmotor 25Dx54L mm This cylindrical, 2.13" x 0.98" x 0.98" brushed DC gearmotor with a 75:1 metal gearbox is a lower-current alternative to the HP version. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available with an encoder. Key specs at 6 V: 75 RPM and 80 mA free-run, 85 oz-in (6.1 kg-cm) and 2.2 A stall.

	Pololu item #: 2286 Price: $34.95 Quantity:
75:1 Metal Gearmotor 25Dx54L mm with 48 CPR Encoder This cylindrical, 2.62" x 0.98" x 0.98" brushed DC gearmotor with a 74.83:1 metal gearbox is a lower-current alternative to the HP version. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 3592 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder. Key specs at 6 V: 75 RPM and 80 mA free-run, 85 oz-in (6.1 kg-cm) and 2.2 A stall.

	Pololu item #: 1576 Price: $21.95 Quantity:
99:1 Metal Gearmotor 25Dx54L mm HP This cylindrical, 2.13" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 99:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor. Key specs at 6 V: 100 RPM and 450 mA free-run, 160 oz-in (11.5 kg-cm) and 6 A stall.

	Pololu item #: 1587 Price: $19.95 Quantity:
99:1 Metal Gearmotor 25Dx54L mm This cylindrical, 2.13" x 0.98" x 0.98" brushed DC gearmotor with a 99:1 metal gearbox is a lower-current alternative to the HP version. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Key specs at 6 V: 57 RPM and 80 mA free-run, 110 oz-in (7.9 kg-cm) and 2.2 A stall.

	Pololu item #: 1577 Price: $21.95 Quantity:
172:1 Metal Gearmotor 25Dx56L mm HP This cylindrical, 2.2" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 172:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor. Key specs at 6 V: 57 RPM and 450 mA free-run, 260 oz-in (18.7 kg-cm) and 6 A stall. (Note: stall torque and current specifications are theoretical values; stalling the motor is likely to damage the gearbox.)

	Pololu item #: 1588 Price: $19.95 Quantity:
172:1 Metal Gearmotor 25Dx56L mm This cylindrical, 2.2" x 0.98" x 0.98" brushed DC gearmotor with a 172:1 metal gearbox is a lower-current alternative to the HP version. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available with an encoder. Key specs at 6 V: 33 RPM and 80 mA free-run, 170 oz-in (12.2 kg-cm) and 2.2 A stall.

	Pololu item #: 2288 Price: $34.95 Quantity:
172:1 Metal Gearmotor 25Dx56L mm with 48 CPR Encoder This cylindrical, 2.69″ × 0.98″ × 0.98″ brushed DC gearmotor with a 171.79:1 metal gearbox is a lower-current alternative to our 25D mm HP gearmotors. It has an integrated 48 CPR quadrature encoder on the motor shaft, which corresponds to 8246 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder. Key specs at 6 V: 33 RPM and 80 mA free-run, 170 oz-in (12.2 kg-cm) and 2.2 A stall.

	Pololu item #: 1589 Price: $19.95 Quantity:
227:1 Metal Gearmotor 25Dx56L mm This cylindrical, 2.2" x 0.98" x 0.98" brushed DC gearmotor with a 227:1 metal gearbox is a lower-current, lower-speed alternative to our 25D mm HP gearmotors. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Key specs at 6 V: 25 RPM and 80 mA free-run, 220 oz-in (15.8 kg-cm) and 2.2 A stall. (Note: stall torque and current specifications are theoretical values; stalling the motor is likely to damage the gearbox.)

	Pololu item #: 1590 Price: $19.95 Quantity:
378:1 Metal Gearmotor 25Dx58L mm This cylindrical, 2.28" x 0.98" x 0.98" brushed DC gearmotor with a 378:1 metal gearbox is a lower-current , lower-speed alternative to our 25D mm HP gearmotors. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Key specs at 6 V: 15 RPM and 80 mA free-run, 250 oz-in (18.0 kg-cm) and 2.2 A stall. (Note: stall torque and current specifications are theoretical values; stalling the motor is likely to damage the gearbox.)

	Pololu item #: 1591 Price: $19.95 Quantity:
499:1 Metal Gearmotor 25Dx58L mm This cylindrical, 2.28" x 0.98" x 0.98" brushed DC gearmotor with a 499:1 metal gearbox is a lower-current , lower-speed alternative to our 25D mm HP gearmotors. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Key specs at 6 V: 12 RPM and 80 mA free-run, 300 oz-in (21.6 kg-cm) and 2.2 A stall. (Note: stall torque and current specifications are theoretical values; stalling the motor is likely to damage the gearbox.)