Overview
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Inside the gearbox of the 228:1 plastic gearmotor with offset output. |
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This 228:1 plastic gearmotor (gearbox with brushed DC motor) is a great low-cost alternative to modified hobby servos or Tamiya gearboxes. The low-current motor is a perfect match for our qik 2s9v1 dual serial motor controller, Baby Orangutan robot controller, or DRV8833 dual motor driver carrier, and the compact size makes this unit an attractive choice for small robot designs. The recommended operating voltage range for this motor is 3V to 12V.
This is a higher-torque, lower-speed version of the 120:1 plastic gearmotor offset output. At 6V, the gearbox and motor provide approximately 100oz-in of torque and 45RPM. The free-running current is 70mA, and the stall current is 800mA. The gearbox is protected by a built-in safety clutch that will typically slip before gear teeth can shear.
This gearmotor comes pre-assembled, with the gears fully enclosed, and the output shaft is 6mm long and 7mm in diameter with two sides flattened. The output shaft is along the same axis as the motor shaft, but offset; we also sell a similar gearmotor with a 90deg; output shaft.
There are two built-in mounting holes that work with our stamped aluminum L-bracket and extended stamped aluminum L-bracket, as shown in the pictures below:
| Plastic gearmotor with offset output (item #1118 or #1119) mounted with Pololu stamped aluminum L-bracket. |
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| Plastic gearmotor with offset output (item #1118 or #1119) mounted with Pololu extended stamped aluminum L-bracket. |
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This gearmotor is compatible with the Solarbotics GMPW plastic wheel, which is available in a variety of colors.
Details for item #1118
Exact gear ratio: ``(36times;37times;37times;24) / (8times;9times;9times;8) ~~ bb(228.17)``
This 228:1 gearbox with brushed DC motor has a low-current motor and provides power and speed that is comparable to an RC servo at a fraction of the cost. It has a recommended operating voltage range of 3V to 12V
Key specifications:
voltage |
no-load performance |
stall extrapolation |
6 V |
45 RPM, 70 mA |
7.2 kg…cm (100 oz…in), 800 mA |
Dimensions
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Dimensions of the 120:1 and 228:1 plastic gearmotors with offset outputs. Units are mm over [inches]. |
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This diagram is also available as a downloadable PDF (242k pdf).