# Tamiya 70167 Single Gearbox (4-Speed) Kit

**Type:** Product page · **SKU:** POLOLU-118 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/tamiya-70167-single-gearbox-4-speed-kit.html ([markdown](https://core-electronics.com.au/tamiya-70167-single-gearbox-4-speed-kit.html.md))

The single gearbox is perfect if you like the gear ratio options of the 70168 double gearbox but need just one motor or added flexibility in positioning multiple output shafts. Available gear ratios are: 12.7:1, 38:1, 115:1, or 344:1.

## Pricing

- **Price:** $21.80 (inc GST) — $19.82 AUD, exc GST
- **Quantity discounts:** 10+ $19.03 (exc GST) · 25+ $18.43 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 21 and Aug 24.

## Description

#### Overview

The Tamiya single gearbox is essentially half of the [Tamiya 70168 double gearbox](https://core-electronics.com.au/tamiya-70168-double-gearbox-kit.html). The kit can be built with gear ratios of 12.7:1, 38:1, 115:1, and 344:1. There are two possible output axle locations (for any given gear ratio, only one output location is possible).

#### Complementary products

The output shafts included in this kit are 3 mm hexagonal axles that are 10 cm (about four inches) from tip to tip. The axles work with any of the [Tamiya wheels](https://core-electronics.com.au/category/35/tamiya-wheels) Pololu carry, giving you many options for your robot speed. The low-voltage motors run on 3-6 volts and draw up to a few amps, making them perfect candidates for the [DRV8833 motor driver carrier](https://core-electronics.com.au/drv8833-dual-motor-driver-carrier.html). Motor overheating can be caused by excessive stalling, even at very low voltages. Pololu recommend that you use stall-detection sensors, or just watch your robot, to make sure that it doesn’t stall for more than a few seconds at a time. For motor specs, see the Mabuchi motor FA-130 (#18100) data sheet (58k pdf).

Note that you can replace the motor in this kit with a [lower-current, higher-voltage motor](https://core-electronics.com.au/brushed-dc-motor-130-size-6v-11-5krpm-800ma-stall.html) if you want to use this gearbox with controllers such as the [qik 2s9v1 dual serial motor controller](https://core-electronics.com.au/pololu-qik-2s9v1-dual-serial-motor-controller.html), [TB6612FNG dual motor driver carrier](https://core-electronics.com.au/tb6612fng-dual-motor-driver-carrier.html), or [Baby Orangutan B-328 robot controller](https://core-electronics.com.au/baby-orangutan-b-328-robot-controller.html).

To compare all Tamiya gear box kits, see the Tamiya Gearbox Gear Ratio Comparison.

**Note:** The single gearbox (4-speed) is a *kit*; assembly is required. To use the kit in robotics projects, you need to connect the motors to your own robot controller.

**People often buy this product together with:**

| [![Tamiya 70111 Sports Tire Set (2 tires)](https://core-electronics.com.au/attachments/localcontent/0J224_3965103e5f.jpg)](https://core-electronics.com.au/tamiya-70111-sports-tire-set-2-tires.html) | [Tamiya 70111 Sports Tire Set (2 tires)](https://core-electronics.com.au/tamiya-70111-sports-tire-set-2-tires.html) |
|---|---|

| [![Tamiya 70145 Narrow Tire Set (2 tires)](https://core-electronics.com.au/attachments/localcontent/0J226_279093ace2.jpg)](https://core-electronics.com.au/tamiya-70145-narrow-tire-set-2-tires.html) | [Tamiya 70145 Narrow Tire Set (2 tires)](https://core-electronics.com.au/tamiya-70145-narrow-tire-set-2-tires.html) |
|---|---|

| [![Tamiya 70105 3mm Diameter Shaft Set](https://core-electronics.com.au/attachments/localcontent/0J2705_32003198ca.jpg)](https://core-electronics.com.au/tamiya-70105-3mm-diameter-shaft-set.html) | [Tamiya 70105 3mm Diameter Shaft Set](https://core-electronics.com.au/tamiya-70105-3mm-diameter-shaft-set.html) |
|---|---|

**General specifications**

 | Typical operating voltage: | 3 V |
|---|---|
| Gear ratio options: | 12.7, 38, 115, 344 :1 |
| No-load motor shaft speed @ 3V: | 12300 rpm[1](https://core-electronics.com.au/#note1) |
| No-load current @ 3V: | 150 mA[2](https://core-electronics.com.au/#note2) |
| Stall current @ 3V: | 2100 mA |
| Motor shaft stall torque @ 3V: | 0.5 oz·in[3](https://core-electronics.com.au/#note3) |
| Color: | gray |

**Notes:**

1A theoretical speed of the gearbox output shaft can be computed by dividing this speed by the gear ratio.2This is the no-load current of the motor when disconnected from the gears in the gearbox; the no-load current of the entire gearbox with the motor connected will be slightly higher and will vary depending on the gear ratio.3A theoretical torque of the gearbox output shaft can be computed by multiplying this torque by the gear ratio. **Documentation and other information**

- ![](https://core-electronics.com.au/attachments/localcontent/0J359_5820399a29.jpg)**Tamiya Gearbox Gear Ratio Comparison**
    
    Table comparing the gear ratios available in the many different Tamiya gearboxes Pololu carry.
- ![](https://core-electronics.com.au/attachments/localcontent/0J323_208447dbc8.jpg)**Tamiya “Toy” Motor Testing by Adam Borrell (a.k.a nexisnet) (Printable PDF)**
    
    Adam, who posts under the username nexisnet on the Pololu forums, has performed a detailed series of experiments to determine how operating voltage affects the lifetime of the Mabuchi FA-130 motor, which happens to be the motors used in the Tamiya 70168 Double Gearbox, 70167 Single Gearbox (4-Speed), 70097 Twin-Motor Gearbox, 70093 3-Speed Crank-Axle Gearbox, 70110 4-Speed Crank-Axle Gearbox, and 70103 Universal Gearbox.
 
**File downloads**

- **Mabuchi motor FA-130 datasheet (see model #18100) (58k pdf)**

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/t/a/tamiya_70167_single_gearbox__4_speed__kit__pololu_118__00.jpg)