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

**Type:** Product page · **SKU:** POLOLU-183 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/solarbotics-gm7-120-1-mini-gear-motor-90-deg-output.html ([markdown](https://core-electronics.com.au/solarbotics-gm7-120-1-mini-gear-motor-90-deg-output.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## Description

**Note:** Pololu now have a similar, slightly less expensive version of this motor: the **[Pololu 120:1 mini plastic gearmotor](https://core-electronics.com.au/120-1-mini-plastic-gearmotor-90-2mm-spline-output.html)**. We also have a **[version with a 3mm-diameter D-shaft](https://core-electronics.com.au/120-1-mini-plastic-gearmotor-90-3mm-d-shaft-output.html)** that works with Pololu's large selection of [Pololu wheels](https://core-electronics.com.au/#).

This 120:1 gearmotor (gearbox with brushed DC motor) is very compact and weighs only 0.7 ounces (20 grams) — perfect for building a quick, miniature robot.

This gearmotor starts rotation at 0.58 V, drawing only 46.5 mA at 7 RPM. At 5 V, the gearbox and motor provide 20 oz-in of torque and 145 RPM. The free-running current is 88 mA, and the stall current is 610 mA. The low-current motor is a perfect match for Pololu's [qik 2s9v1 dual serial motor controller](https://core-electronics.com.au/pololu-qik-2s9v1-dual-serial-motor-controller.html).

This gearmotor comes pre-assembled, with the gears fully enclosed. A clutch limits the output torque to approximately 25 oz-in (which is produced at 6.5 V, drawing 650 mA) to protect the gearbox and motor. The unit has one mounting hole, and the chrome-finish output shaft is splined with a 0.08" (2 mm)-crest diameter.

A custom [plastic wheel](https://core-electronics.com.au/catalog/product/view/sku/POLOLU-190) is available for this gearmotor, as well as a [LEGO wheel adapter](https://core-electronics.com.au/2mm-shaft-adapter.html) that allows it to be used with a variety of LEGO wheels.

For a version of this gearmotor with the output shaft parallel to the motor shaft, see the [GM6 gearmotor](https://core-electronics.com.au/solarbotics-gm6-120-1-mini-gear-motor-offset-output.html). For a similar but larger gearmotor, see the [GM3 gearmotor](https://core-electronics.com.au/solarbotics-gm3-224-1-gear-motor-90-deg-output.html) (224:1) and the [GM9 gearmotor](https://core-electronics.com.au/solarbotics-gm9-143-1-gear-motor-90-deg-output.html) (143:1).

## Specifications

- Description: Mini 90-degree
- Gear ratio: 120:1
- 3 V Operation: 
    - No-load RPM: ~ 75
    - No-load current: ~ 80 mA
    - Stall current: ~ 310 mA
    - Stall torque: ~ 13.6 oz-in
- 6 V Operation: 
    - No-load RPM: ~ 146
    - No-load current: ~ 92 mA
    - Stall current: ~ 525 mA
    - Stall torque: ~ 23.8 oz-in
- Weight: 19 g
 
| ![](https://core-electronics.com.au/media/remote_images/0J3702.600_iJvVHT.png%3Fc63e7251bb50ff4010b3da6b29ad955c) |
|---|
| Solarbotics GM7 gearmotor dimensions (in mm). |

You can download a pdf version of this drawing with imperial dimensions (113k pdf) or metric dimensions (113k pdf).

Though the product picture shows two gearmotors, this product is for a single motor.

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/o/solarbotics_gm7_120_1_mini_gear_motor_90_deg._output__pololu_183__00.jpg)