> **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

# Modern Robotics/MATRIX 12VDC Motor with 8mm REX Pinion Shaft

**Type:** Product page · **SKU:** GB-5000-0002-4008 · **Brand:** [goBilda](https://core-electronics.com.au/brands/gobilda)
**Page:** https://core-electronics.com.au/modern-roboticsmatrix-12vdc-motor-with-8mm-rex-pinion-shaft.html ([markdown](https://core-electronics.com.au/modern-roboticsmatrix-12vdc-motor-with-8mm-rex-pinion-shaft.html.md))

This is the motor that drives the popular 5202 Series Yellow Jacket Gear Motors, but with a bit of a twist. Where you would typically...

## Pricing

- **Price:** $57.15 (inc GST) — $51.95 AUD, exc GST
- **Quantity discounts:** 10+ $49.35 (exc GST) · 25+ $46.76 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 01 and Sep 04.

## How to buy

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## Description

This is the motor that drives the popular Yellow Jacket Planetary Gear Motors, but with a **R**ound h**EX** twist! Where you would normally find a pinion gear, we’ve installed an **8mm REX™** pinion shaft.

8mm REX™ is the signature positive-drive profile that’s compatible with a wide range of goBILDA® components—from hubs, to gears, to sprockets, pulleys, and more—across our build system ecosystem.

And what’s a “pinion shaft?” Well, we didn’t want to cause confusion between the factory motor shaft, which measures 0.125”, and the shaft that fits onto it, hence the unique name. The 8mm REX™ output shaft protrudes 33.5mm from the plastic mounting plate fastened to the motor, so you have plenty of real estate to attach a gear, pulley or hub to, while still leaving room for an 8mm REX™ bearing to add the necessary support.

This motor has a **tested speed of 5800RPM**. Make sure to put on your safety glasses, and let it rip!

### Downloads

- [ STEP File ](https://core-electronics.com.au/attachments/localcontent/5000-0002-4008_11405b19600.zip)

### Specs

| Weight | 261g |
|---|---|
| Motor Type | Brushed DC |
| Nominal Voltage | 12VDC |
| No-Load Speed @ 12VDC (Theoretical) | 6000 RPM |
| No-Load Speed @ 12VDC (Tested) | 5800 RPM |
| No-Load Current @12VDC | 0.25A |
| Stall Current @12VDC | 9.2A |
| Stall Torque @12VDC | 1.47 kg.cm (20.45 oz-in) |
| Wire Length | 470mm (including connectors) |
| Motor Connector Type | 3.5mm FH-MC Bullet Connectors |
| Encoder Connector Type | 4-Pos JST XH \[FH-MC\] |
| Encoder Type | Relative, Quadrature |
| Encoder Sensor Type | Magnetic (Hall Effect) |
| Encoder Voltage Range | 3.3 - 5VDC |
| Encoder Cycles Per Revolution (Encoder Shaft) | 7 (Rises of Ch A) |
| Encoder Cycles Per Revolution (Output Shaft) | 7 (Rises of Ch A) |
| Encoder Countable Events Per Revolution (Encoder Shaft) | 28 (Rises & Falls of Ch A & B) |
| Encoder Countable Events Per Revolution (Output Shaft) | 28 (Rises & Falls of Ch A & B) |

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/G/B/GB-5000-0002-4008-1.jpg)