# Strafer™ Chassis Kit (140mm Mecanum Wheels)

**Type:** Product page · **SKU:** GB-3209-0012-0001 · **Brand:** [goBilda](https://core-electronics.com.au/brands/gobilda)
**Page:** https://core-electronics.com.au/strafer-chassis-kit-140mm-mecanum-wheels.html ([markdown](https://core-electronics.com.au/strafer-chassis-kit-140mm-mecanum-wheels.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: GB-3209-0012-0002.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/GB-3209-0012-0002

## Description

Drive in any direction with the Strafer® Chassis Kit! This version utilizes 140mm diameter mecanum wheels. (A [96mm wheels version](https://core-electronics.com.au/strafer-chassis-kit-96mm-mecanum-wheels.html) is also available.)

Mecanum wheels have diagonal rollers that allow the chassis to drive sideways and diagonally, in addition to conventional skid-steer style steering. This kit’s mecanum wheels are just one of the many ways it provides for the construction of a rigid, low profile, extensively modifiable chassis you can reconfigure in any direction!

**Motors**
At first glance, you might wonder: where are the motors? Flip the chassis over to see four [223 RPM 5203 Series Planetary Gear Motors](https://core-electronics.com.au/5203-series-yellow-jacket-planetary-gear-motor-2691-ratio-24mm-length-8mm-rex-shaft-223-rpm-33-5v-encoder.html) seated within the channel frame. These motors drive steel miter gears and heavy duty hub-shafts riding on ball bearings to make for low-friction holonomic action! The included 140mm diameter mecanum wheels give the chassis a theoretical speed of 5.35 ft/sec.

**Miter Gears**
The motors owe their compact position to the 90° drive created by steel miter gears inside each corner of the chassis. Thoroughly battle-tested through years of robots at even the highest level of competition, they boast profile-matched bores to eliminate any chance of slipping.

**Shafting**
8mm REX motor shafts and hub-shafts facilitate fierce positive drive and a smooth assembly.

**Wheels** The [goBILDA® Mecanum Wheels](https://core-electronics.com.au/140mm-mecanum-wheel-set-70a-durometer-bearing-supported-rollers.html) feature ball-bearing supported rollers, a narrow profile, and steel side plates. The 140mm diameter provides **a massive 46mm of ground clearance** for avoiding and overcoming obstacles!

**Frame** Unlike other frames requiring exposed motion components, the Strafer Chassis can fit all non-wheel parts inside its highly configurable and goBILDA® pattern 1120 Series U-Channel structure.

### not in ftc?

**If you're building outside FTC:** You don't need a garage of parts or any prior experience to power and drive your new chassis with mobile mecanum action! Just purchase the following products to accompany your Strafer Chassis Kit.

- 1 Mecanum Mixer (3109-0001-0001)
- 1 Strafer™ Chassis Kit (3209-0001-0005 or 3209-0012-0001)
- 1 Radio Control System (3113-2006-0001)
- 1 Battery (3100-0012-0020)
- 1 Battery Charger (3101-0012-0001)
- 4 Motor Controllers (3105-0101-0015)
- 1 Power Distribution Board (3108-2833-0801)

Product Insight #4 in the image gallery above shows you how to wire them together for remote control capabilty!

**If you *are* in FTC:** Note that while our Strafer Chassis are competition-legal, the only competition-legal item in the list above is the XT30 Power Distribution Board. The overall setup, however, can be useful for prototyping!

### Kit Contents:

| QTY | SKU | Name |
|---|---|---|
| 2 | [GB-1120-0010-0264](https://core-electronics.com.au/1120-series-u-channel-10-hole-264mm-length.html) x 2 | 1120 Series U-Channel (10 Hole, 264mm Length) |
| 2 | [GB-1120-0017-0432](https://core-electronics.com.au/1120-series-u-channel-17-hole-432mm-length.html) x 2 | 1120 Series U-Channel (17 Hole, 432mm Length) |
| 8 | [GB-1201-0043-0002](https://core-electronics.com.au/1201-series-quad-block-pattern-mount-43-2.html) x 8 | 1201 Series Quad Block Pattern Mount (43-2) |
| 4 | [GB-1522-0010-0120](https://core-electronics.com.au/1522-series-8mm-id-spacer-10mm-od-12mm-length-4-pack.html) x 1 | 1522 Series 8mm ID Spacer (10mm OD, 12mm Length) - 4 Pack |
| 4 | [GB-1611-0514-0006](https://core-electronics.com.au/1611-series-flanged-ball-bearing-6mm-id-x-14mm-od-5mm-thickness-2-pack.html) x 2 | 1611 Series Flanged Ball Bearing (6mm ID x 14mm OD, 5mm Thickness) - 2 Pack |
| 4 | [GB-1611-0514-0008](https://core-electronics.com.au/1611-series-flanged-ball-bearing-8mm-id-x-14mm-od-5mm-thickness-2-pack.html) x 2 | 1611 Series Flanged Ball Bearing (8mm ID x 14mm OD, 5mm Thickness) - 2 Pack |
| 4 | [GB-2110-0608-0001](https://core-electronics.com.au/shouldered-8mm-rex-hub-shaft-70mm-length.html) x 4 | Shouldered 8mm REX Hub-Shaft (70mm Length) |
| 8 | [GB-2315-4008-0030](https://core-electronics.com.au/2315-series-steel-mod-125-miter-gear-8mm-rex-bore-30-tooth.html) x 8 | 2315 Series Steel, MOD 1.25 Miter Gear (8mm REX Bore, 30 Tooth) |
| 25 | [GB-2800-0004-0008](https://core-electronics.com.au/2800-series-zinc-plated-steel-socket-head-screw-m4-x-07mm-8mm-length-25-pack.html) x 1 | 2800 Series Zinc-Plated Steel Socket Head Screw (M4 x 0.7mm, 8mm Length) - 25 Pack |
| 75 | [GB-2800-0004-0011](https://core-electronics.com.au/2800-series-zinc-plated-steel-socket-head-screw-m4-x-07mm-11mm-length-25-pack.html) x 3 | 2800 Series Zinc-Plated Steel Socket Head Screw (M4 x 0.7mm, 11mm Length) - 25 Pack |
| 25 | [GB-2801-0004-0008](https://core-electronics.com.au/2801-series-zinc-plated-steel-washer-4mm-id-x-8mm-od-25-pack.html) x 1 | 2801 Series Zinc-Plated Steel Washer (4mm ID x 8mm OD) - 25 Pack |
| 12 | [GB-2807-0811-0500](https://core-electronics.com.au/2807-series-stainless-steel-shim-8mm-id-x-11mm-od-050mm-thickness-12-pack.html) x 2 | 2807 Series Stainless Steel Shim (8mm ID x 11mm OD, 0.50mm Thickness) - 12 Pack |
| 4 | [GB-3213-3606-0003](https://core-electronics.com.au/140mm-mecanum-wheel-set-70a-durometer-bearing-supported-rollers.html) x 1 | 140mm Mecanum Wheel Set (70A Durometer Bearing Supported Rollers) |
| 4 | [GB-3801-0613-0100](https://core-electronics.com.au/2-pos-jst-vh-mh-fc-to-35mm-bullet-mh-fc-adaptor-100mm-length.html) x 4 | 2-Pos JST VH \[MH-FC\] to 3.5mm Bullet \[MH-FC\] Adaptor (100mm Length) |
| 1 | [GB-5027103001](https://core-electronics.com.au/wera-tools-25mm-ball-end-hex-plus-l-key.html) x 1 | Wera Tools 2.5mm Ball End Hex-Plus L-Key |
| 1 | [GB-5027104001](https://core-electronics.com.au/wera-tools-3mm-ball-end-hex-plus-l-key.html) x 1 | Wera Tools 3mm Ball End Hex-Plus L-Key |
| 4 | [GB-5203-2402-0027](https://core-electronics.com.au/5203-series-yellow-jacket-planetary-gear-motor-2691-ratio-24mm-length-8mm-rex-shaft-223-rpm-33-5v-encoder.html) x 4 | 5203 Series Yellow Jacket Planetary Gear Motor (26.9:1 Ratio, 24mm Length 8mm REX™ Shaft, 223 RPM, 3.3 - 5V Encoder) |

### Downloads

- [ STEP File ](https://core-electronics.com.au/attachments/localcontent/3209-0012-0001_1904007c962.zip)
- [ Spec Sheet ](https://core-electronics.com.au/attachments/localcontent/3209-0012-0001-spec-sheet_32665e36908.pdf)
- [ Assembly Instructions ](https://core-electronics.com.au/attachments/localcontent/3209-0012-0001_assembly_instructions_3468068938a.pdf)
 
### Specs

 | Weight | 4872g (10.74lbs) Assembled |
|---|---|

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/G/B/GB-3209-0012-0001-1.jpg)