Solarbotics GM9 143:1 Gear Motor 90 deg. Output

This 143:1 gearmotor (gearbox with motor) is a faster version of the GM3 gearmotor. It 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, and the compact size of 2.78" x 1.06" x 0.91" (70.5 x 27 x 23 mm) makes this unit an attractive choice for small robot designs.

At 5 V, the gearbox and motor provide 43 oz-in of torque and 66 RPM, which is faster than a standard RC servo. The free-running current is 74 mA, and the stall current is 670 mA. This motor also comes with a built-in safety clutch.

This gearmotor comes pre-assembled, with the gears fully enclosed. There are built-in mounting holes, and the output shaft is 7 mm in diameter with two sides flattened. Please note that the output shaft is slightly shorter than on the GM2 and GM3 gearmotors.

A custom-molded GMPW plastic wheel for this gearmotor is available.

For similar gearmotors, you might want to take a look at:

• Less expensive: Pololu 120:1 plastic gearmotor 90-degree output
• Higher torque: GM3 gearmotor
• Parallel output shaft: GM8 gearmotor
• Smaller: GM7 gearmotor

To increase the power of this gearbox, you can replace the motor with a higher-power RM2 motor. For a replacement motor, see the RM3 motor.

Note: This gearmotor does not come with mounting hardware, instructions, or packaging. A mounting bracket is not required but can be purchased separately for more versatile installation. Please note that the output shaft is slightly shorter than on the GM2 and GM3 gearmotors.

Specifications

• Description: 90-degree
• Gear ratio: 143:1
• 3 V Operation:
  • No-load RPM: ~ 40
  • No-load current: ~ 50 mA
  • Stall current: ~ 400 mA
  • Stall torque: ~ 44 oz-in
• 6 V Operation:
  • No-load RPM: ~ 78
  • No-load current: ~ 52 mA
  • Stall current: ~ 700 mA
  • Stall torque: ~ 76 oz-in
• L x W x H: 70.5 x 27 x 23 mm
• Weight: 33 g

People often buy this product together with:

Solarbotics GM3 224:1 Gear Motor 90 deg. Output

Solarbotics GM8 143:1 Gear Motor Offset Output

Solarbotics GM7 120:1 Mini Gear Motor 90 deg. Output