This compact, inexpensive, low-current gearmotor (gearbox with motor) offers high rotation speed and decent torque, making it well suited for use in small robots. At 4.5 V, it has a free-run speed of 120 RPM and a stall torque of approximately 20 oz-in. The splined output shaft has a crest diameter of 2 mm. Though the product picture shows two gearmotors, this product is for a single motor.
Overview
This 120:1 gearmotor is a very compact 1.44" x 0.79" x 1.08" (36.5 x 20 x 27.4 mm) and weighs only 0.7 ounces (19 grams) - perfect for building a quick, miniature robot. The recommended operating voltage range for this motor is 3 - 6 V, though the gearmotor can start rotating at voltages as low as 0.6 V.
At 4.5 V, this gearmotor has a free-run speed of 120 RPM and a stall torque of approximately 20 oz-in (1.4 kg-cm). It has a free-run current of 80 mA, and a stall current of 800 mA. The low-current motor makes this a great match for our 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 sheer.
This gearmotor comes pre-assembled, with the gears fully enclosed. The unit has one mounting hole, and the chrome-finish output shaft is splined with a 0.08" (2 mm)-crest diameter.
We offer a LEGO wheel adapter that allows this gearmotor to be used with a variety of LEGO wheels.
Output Options
We sell four versions of this motor, all with 120:1 gearboxes:
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SPECIFICATIONS
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Dimensions
| Size: |
36.5 x 20 x 27.4 mm |
| Weight: |
19 g |
| Shaft diameter: |
2 mm1 |
General specifications
| Shaft type: |
offset 2mm spline |
| Typical operating voltage: |
4.5 V |
| Gear ratio: |
120:1 |
| Free-run speed @ 4.5V: |
120 rpm |
| Free-run current @ 4.5V: |
80 mA |
| Stall current @ 4.5V: |
800 mA |
| Stall torque @ 4.5V: |
20 ozÃÆâ€â„¢ÃƒÆ’†â€Ã¢â€žÂ¢ÃƒÆ’ƒÂ¢€ÃƒÆ’â€Â¦Ãƒâ€šÃ‚¡ÃƒÆ’Æâ€â„¢ÃƒÆ’¢€Ãƒâ€¦Ã‚¡ÃƒÆ’â€Ã…¡Ãƒâ€Å¡Ãƒâ€šÃ‚·in |
Notes:
- 1
- Measurement is diameter of spline crest.
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RESOURCES
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File downloads
- Dimensions (in mm) of the 120:1 mini plastic gearmotor with offset 2mm spline output(749k pdf)
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