120:1 Plastic Gearmotor, 90° Output

This 120:1 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 3 V to 12 V.

Key specifications:

Overview

Inside the gearbox of the 200:1 plastic gearmotor with 90 degree output.

This 120:1 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 3 V to 12 V.

This is a lower-torque, higher-speed version of the 200:1 plastic gearmotor 90-degree output . At 6 V, the gearbox and motor provide approximately 75 oz-in of torque and 85 RPM. The free-running current is 70 mA, and the stall current is 800 mA. 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 6 mm long and 7 mm in diameter with two sides flattened. The output shaft is at a 90° angle from the axis of the motor shaft; we also sell a version of this gearmotor with an offset 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 90-degree output (item #1120 or #1121) mounted with Pololu stamped aluminum L-bracket.

Plastic gearmotor with 90-degree output (item #1120 or #1121) mounted with Pololu extended stamped aluminum L-bracket.

A custom-molded GMPW plastic wheel for this gearmotor is available in a variety of colors.

Details for item #1121

Exact gear ratio: ``(36×32×37×24) / (8×14×9×8) ~~ bb(126.86)``

This 120:1 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 3 V to 12 V

Key specifications:

Dimensions

Dimensions of the 120:1 and 200:1 plastic gearmotors with 90-degree outputs. Units are mm over [inches].

This diagram is also available as a downloadable PDF (245k pdf).