> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # Tamiya 72004 Worm Gearbox Kit **Type:** Product page · **SKU:** POLOLU-73 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/tamiya-72004-worm-gearbox-kit.html ([markdown](https://core-electronics.com.au/tamiya-72004-worm-gearbox-kit.html.md)) ## Retired product This product is retired and no longer available for purchase. Search the catalogue for an alternative. ## How to buy - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description The primary feature of the Tamiya 72004 Worm Gearbox from Tamiya’s high-efficiency series is a worm gear, which locks the output shaft whenever the motor isn’t turning. The high gear ratios of 216:1 or 336:1 make this gearbox appropriate for small walking robots, lifting mechanisms, and other applications where high torque is desired. The low-voltage motors in the worm gearbox run on 1.5-4.5 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. This gearbox has a 4 mm diameter, round output shaft, which works with the [wheels that are compatible with Tamiya 4 mm, round shafts](https://core-electronics.com.au/category/99/wheels-compatible-with-tamiya-4mm-round-shafts). Pololu's [3 mm universal mounting hub](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-3mm-shaft-4-40-holes-2-pack.html) also fits on the smaller threaded end of the shaft, although it is not specifically intended to work with this type of shaft (the hub’s set screw could damage the thread on the shaft). For motor specs, see the Mabuchi motor RE-260 (#2295) data sheet (59k pdf). To compare all Tamiya gear box kits, see the Tamiya Gearbox Gear Ratio Comparison. **Note:** The worm gearbox 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 70145 Narrow Tire Set (2 tires)](https://a.pololu-files.com/picture/0J226.100.jpg?a6c70dcdea0f0c575d06ae8739820834)](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 70110 4-Speed Crank-Axle Gearbox Kit](https://a.pololu-files.com/picture/0J265.100.jpg?d3ef208a3274f79cdeb8c9575f5db579)](https://core-electronics.com.au/tamiya-70110-4-speed-crank-axle-gearbox-kit.html) | [Tamiya 70110 4-Speed Crank-Axle Gearbox Kit](https://core-electronics.com.au/tamiya-70110-4-speed-crank-axle-gearbox-kit.html) | |---|---| | [![Tamiya 70103 Universal Gearbox Kit](https://a.pololu-files.com/picture/0J278.100.jpg?3a8291376ead64cd3aa5660f4e34213d)](https://core-electronics.com.au/tamiya-70103-universal-gearbox-kit.html) | [Tamiya 70103 Universal Gearbox Kit](https://core-electronics.com.au/tamiya-70103-universal-gearbox-kit.html) | |---|---| **General specifications** | Typical operating voltage: | 3 V | |---|---| | Gear ratio options: | 216, 336 :1 | | No-load motor shaft speed @ 3V: | 9400 rpm[1](https://core-electronics.com.au/#note1) | | No-load current @ 3V: | 150 mA[2](https://core-electronics.com.au/#note2) | | Stall current @ 3V: | 2700 mA | | Motor shaft stall torque @ 3V: | 0.97 oz·in[3](https://core-electronics.com.au/#note3) | **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://a.pololu-files.com/picture/0J359.100.jpg?dd9ec269ad8792df6b89768e12ead3e7)**Tamiya Gearbox Gear Ratio Comparison** Table comparing the gear ratios available in the many different Tamiya gearboxes Pololu carry. **File downloads** - **Mabuchi motor RE-260 datasheet (see model #2295) (59k pdf)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/t/a/tamiya_72004_worm_gearbox_kit__pololu_73__00.jpg)