Robot MarketPlace - 180:1 Offset Shaft Mini Plastic Gearmotor

This compact, inexpensive, low-current gearmotor (motor with a 180:1 reduction gearbox) is well suited for use in small robots. At 4.5V, it has a free-run speed of 80 RPM and a stall torque of approximately 30 oz-in (however, the built-in safety clutch might start slipping before the stall torque is reached). The D-shaped output shaft has a diameter of 3mm and works with the Pololu wheels and a 3mm universal aluminum mounting hub. This gearbox output shaft is offset from but parallel to the motor shaft.

This gearmotor is very compact and weighs only 0.7 ounces (19.5 grams) -- perfect for building a quick, miniature robot. The recommended operating voltage range for this motor is 3 to 6V, though the gearmotor can start rotating at voltages as low as 0.6V. At 4.5V, the motor has a free-run current of 80 mA and a stall current of 800 mA; this relatively low current draw makes this a great match for the qik 2s9v1 dual serial motor controller and programmable Orangutan robot controllers. The stall current, torque, and rotation speed will approximately scale linearly with the motor voltage. The gearbox is protected by a built-in safety clutch that will typically slip before gear teeth can shear.

Specs
Size	36.5 x 20 x 27.4mm
Weight	0.7 oz
Shaft Diameter	3mm
Shaft Type	Offset 3mm D
Typical Operating Voltage	4.5V
Gear Ratio	180:1
No Load Speed at 4.5V	80 rpm
No Load Current at 4.5V	80 mA
Stall Current at 4.5V	800 mA
Stall Torque at 4.5V	30 oz-in