> **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 # TT Motor Bi-Metal Gearbox - 1:90 Gear Ratio **Type:** Product page · **SKU:** ADA3801 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/tt-motor-bi-metal-gearbox-1-90-gear-ratio.html ([markdown](https://core-electronics.com.au/tt-motor-bi-metal-gearbox-1-90-gear-ratio.html.md)) These durable (but affordable!) gearbox motors (also known as 'TT' motors) are an easy, low-cost way to get your projects moving. This is a TT DC Bi-Metal Gearbox... ## Pricing - **Price:** $10.50 (inc GST) — $9.55 AUD, exc GST - **Quantity discounts:** 10+ $9.25 (exc GST) · 50+ $9.07 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 31 and Sep 03. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA3801:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA3801:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **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 These durable (but affordable!) gearbox motors (also known as 'TT' motors) are an easy, low-cost way to get your projects moving. This is a **TT DC Bi-Metal Gearbox Motor** with a gear ratio of **1:90** about **double** of the 'standard' 1:48 ratio. That gives them higher torque but slower rotational speed. Since they're slower they're good for robots where strength is more important than speed. [They look a lot like Adafruit's yellow all-plastic-gearbox motors](https://core-electronics.com.au/dc-gearbox-motor-tt-motor-200rpm-3-to-6vdc.html) but these have the output-half of the motor gears machined from steel, so they won't strip as easily, and they're twice as slow (and twice as powerful) given their lower gearbox ratio. The metal gears also mean they're louder when running. You can power these motors with 3VDC up to 6VDC, they'll of course go a little faster at the higher voltages. Adafruit grabbed one motor and found these stats when running it from a bench-top supply - At **3VDC** AdaFruit measured 80mA @ 60 RPM no-load, and 0.5 Amps when stalled - At **4.5VDC** AdaFruit measured 90mA @ 90 RPM no-load, and 0.8 Amps when stalled - At **6VDC** AdaFruit measured 100mA @ 120 RPM no-load, and 1.0 Amps when stalled Note that these are very basic motors, and have no built-in encoders, speed control or positional feedback. Voltage goes in, rotation goes out! There will be variation from motor to motor, so a separate feedback system is required if you need precision movement. Comes 1 x per order, with just the motor. These motors *do not* come with wires attached, so you'll need to solder wires on yourself. You *cannot* drive these directly from a microcontroller, **a high-current motor driver is required**! [Adafruit recommend Adafruit's DRV8833 motor driver for these motors](https://core-electronics.com.au/adafruit-drv8833-dc-stepper-motor-driver-breakout-board.html), as it works well down to 3V and can be set up with current limiting since the stall current on these can get high. [The TB6612 can also be used](https://core-electronics.com.au/search/?q=tb6612), it's on Adafruit's shields and wings, but you'll need to supply at least 4.5V - which is what you'll likely want to run these motors at anyhow! [Adafruit have a range of wheels, add-ons and accessories for these motors](https://core-electronics.com.au/search/?q=tt%20motor) so you can bling out your bot just the way you like. ### Technical Details - Dimensions (excluding shaft): 70 x 22 x 22mm - Product Weight: 34.6g / 1.2oz ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/3/8/3801-01.jpg)