# Tamiya 70203 Low-Current Motor Gearbox (3-Speed)

**Type:** Product page · **SKU:** POLOLU-2196 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/tamiya-70203-low-current-motor-gearbox-3-speed.html ([markdown](https://core-electronics.com.au/tamiya-70203-low-current-motor-gearbox-3-speed.html.md))

This gearbox features a low-current brushed DC motor, which is great for projects where you want to keep your power consumption to a minimum. Its single gear train can be assembled to have one of three gear ratios: 12.7:1, 38.2:1, or 114.7:1.

## Pricing

- **Price:** $37.95 (inc GST) — $34.50 AUD, exc GST
- **Quantity discounts:** 10+ $33.12 (exc GST) · 25+ $32.08 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 25 and Sep 28.

## Description

The Tamiya 70203 Low-Current Motor Gearbox kit includes one brushed DC motor and all the gears and parts to build any of the three possible gear ratio configurations: 12.7:1, 38.2:1, 114.7:1. The three gear ratio options give you the flexibility to choose the best speed and torque for your project.

| [![](https://core-electronics.com.au/attachments/localcontent/0J4309_24297fe96a9.jpg)](https://core-electronics.com.au/attachments/localcontent/0J4309_157617213b8.jpg) |
|---|
| Tamiya 70203 low-current gearbox kit. |

The kit includes step-by-step illustrated instructions in both Japanese and English. A scanned copy of the instructions is available on the Pictures tab. The kit can be built with just a screwdriver, but the instructions recommend having [side cutters](https://core-electronics.com.au/st-1-mini-diagonal-cutter.html) and a modeling knife on hand.

#### Complementary products

The output shaft included in this kit is a 3 mm hexagonal axle that is 10 cm (about 4") from tip to tip. The axle works with many of the [Tamiya wheels](https://core-electronics.com.au/category/35/tamiya-wheels) Pololu carry. The low-voltage motor runs on 0.5 V to 3 V and draws less than 1 A, making it a perfect candidate for the [DRV8835](https://core-electronics.com.au/drv8835-dual-motor-driver-carrier.html) or the [DRV8833 motor driver carrier](https://core-electronics.com.au/drv8833-dual-motor-driver-carrier.html). The mounting holes on the gearbox are compatible with the [Tamiya 70098 universal plate set](https://core-electronics.com.au/tamiya-70098-universal-plate-set.html) and other [Tamiya construction series products](https://core-electronics.com.au/category/61/tamiya-products)

**Features**

- Free-Run Speed @ 3 V: see picture to the right for RPM table | ![](https://core-electronics.com.au/attachments/localcontent/0J4343_19560e27284.jpg) |
    |---|
    | Tamiya 70203 low-current gearbox torque and RPM at 3 V. |
- Free-run current @ 3 V: 20 mA
- Stall current @ 3 V: 670 mA
- Torque @ 3 V: see picture to the right for torque table
- Three different gear ratios: 
    - 12.7:1
    - 38.2:1
    - 114.7:1
- 3 mm hexagonal output shaft (length: 100 mm) compatible with Pololu's [adapter for LEGO wheels](https://core-electronics.com.au/3mm-hexagonal-shaft-adapter.html) and many of [Tamiya’s wheels](https://core-electronics.com.au/category/35/tamiya-wheels)
- Two mounting orientations
- Transparent gear housing shows the internal mechanisms
- Crank plates

**Note:** The Tamiya 70203 Low-Current Motor Gearbox is a *kit*; assembly is required.

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

| [![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) |
|---|---|

| [![Tamiya 70168 Double Gearbox Kit](https://core-electronics.com.au/attachments/localcontent/0J258_3525435be7.jpg)](https://core-electronics.com.au/tamiya-70168-double-gearbox-kit.html) | [Tamiya 70168 Double Gearbox Kit](https://core-electronics.com.au/tamiya-70168-double-gearbox-kit.html) |
|---|---|

| [![Tamiya 70188 Mini Motor Gearbox (8-Speed) Kit](https://core-electronics.com.au/attachments/localcontent/0J2210_51052fce1e.jpg)](https://core-electronics.com.au/tamiya-70188-mini-motor-gearbox-8-speed-kit.html) | [Tamiya 70188 Mini Motor Gearbox (8-Speed) Kit](https://core-electronics.com.au/tamiya-70188-mini-motor-gearbox-8-speed-kit.html) |
|---|---|

**General specifications**

 | Typical operating voltage: | 3 V |
|---|---|
| Gear ratio options: | 12.7, 38.2, 114.7 :1 |
| No-load current @ 3V: | 20 mA[1](https://core-electronics.com.au/#note1) |
| Stall current @ 3V: | 670 mA |
| Color: | clear |

**Notes:**

1This 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.

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/t/a/tamiya_70203_low_current_motor_gearbox__3_speed___pololu_2196__00.jpg)