Solarbotics GM8 Gear Motor 3-12V (143:1) with offset shaft

The Solarbotics GM8 Gear Motor has a 143:1 gear ratio and an offset shaft.

The 143:1 gear ratio allows this motor to run about twice as fast as the similar Solarbotics GM2 Gear Motor. When running at 3V without a load, this motor spins at 40 rounds per minute drawing only 50mA. This motor features a built in safety clutch.

The shaft on this motor has a diameter of 7mm and is flat on two sides and fits the Solarbotics Gear Motor Wheels perfectly. The shaft on this motor is just a bit shorter than the similar GM2.

Note: the green shaft is not designed to take a rotational load and should not be used.

References

• Mechanical Drawing (Imperial)
• Mechanical Drawing (Metric)

Motor Specifications
Motor Type	Gearbox
Motor Voltage	3-12 V
Gear Ratio	143:1
No-Load Current at 3V	50 mA
No-Load Speed at 3V	40 RPM
Stall Current at 3V	400 mA
Stall Torque at 3V	3.2 kg-cm (44.4 oz-in)
No-Load Current at 6V	52 mA
No-Load Speed at 6V	78 RPM
Stall Current at 6V	700 mA
Stall Torque at 6V	5.5 kg-cm (76.4 oz-in)
Dimensions
Shaft Diameter	7 mm (0.3 in) two sides flattened
Size	55 x 48 x 23 mm (2.2 x 1.9 x 0.9 in)
Weight	31.5 g (1.13 oz)

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