This cylindrical, 1.97" x 0.98" x 0.98" gearmotor uses a motor with extra-strong magnets and a 20.4:1 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: 480 RPM and 450 mA free-run, 36 oz-in (2.6 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 |
