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Solarbotics GM8 143:1 Gear Motor Offset Output
 
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The GM8 is essentially a 143:1 version of the GM2 gearmotor. If you want a bit more speed than what the GM2 will give you, this is the motor for you!
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This 143:1 gearmotor (gearbox with motor) is a faster version of the GM2 gearmotor. It is a great low-cost alternative to modified hobby servos or Tamiya gearboxes. The low-current motor is a perfect match for our micro dual serial motor controller, and the compact size of 2.17" x 1.89" x 0.91" (55mm x 48mm x 23mm) makes this unit an attractive choice for small robot designs.
At 5 V, the gearbox and motor provide 43 oz * in. of torque and 70 RPM, which is faster than a standard RC servo. The free-running current is 58 mA, and the stall current is 670 mA. This motor also comes with a built-in safety clutch.
This gearmotor comes pre-assemebled, with the gears fully enclosed. There are built-in mounting holes, and the output shaft is 7 mm in diameter with two sides flattened. Please note that the output shaft is slightly shorter than on the GM2 and GM3 gearmotors. Also, the green end of the output shaft should not be used (it is difficult to get to, anyway).
A custom-molded GMPW plastic wheel for this gearmotor is available.
For similar gearmotors, you might want to take a look at:
- Higher torque: GM2 gearmotor
- 90 degree output shaft: GM9 gearmotor
- Smaller: GM6 gearmotor
To increase the power of this gearbox, you can replace the motor with a higher-power RM2 motor.
Note: This gearmotor does not come with mounting hardware, instructions, or packaging. Please note that the output shaft is slightly shorter than on the GM2 and GM3 gearmotors.
