Pololu 34:1 Metal Gearmotor 25Dx52L mm HP

This cylindrical, 2.05" x 0.98" x 0.98" gearmotor uses a motor with extra-strong magnets and a 34:1 metal gearbox to deliver a lot of power in a relatively small package. This unit has a 0.315"-long, 4 mm-diameter D-shaped output shaft.

Key specs at 6 V: 285 RPM and 450 mA free-run, 60 oz-in (4.3 kg-cm) and 6 A stall.

This 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, though they can begin rotating at voltages as low as 1 V. Higher voltages could start negatively affecting the life of the motor.

Metal Gearmotor Comparison Table

atio	No-Load Speed @ 6 V	Stall Torque @ 6 V	Stall Current @ 6 V	With Encoder	Without Encoder
1:1	9800 RPM	2 oz-in	6 A	motor without gearbox
	5600 RPM	1 oz-in	2.2 A	motor without gearbox
4.4:1	2220 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