> **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 # 3pi+ Chassis Kit (No Motors or Electronics) **Type:** Product page · **SKU:** POLOLU-3725 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/3pi-chassis-kit-no-motors-or-electronics.html ([markdown](https://core-electronics.com.au/3pi-chassis-kit-no-motors-or-electronics.html.md)) This kit gives you the structural pieces you need to build your own 3pi+ robot. The chassis includes an integrated ball caster and battery holder for four... ## Pricing - **Price:** $43.95 (inc GST) — $39.95 AUD, exc GST - **Quantity discounts:** 10+ $38.35 (exc GST) · 25+ $37.15 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Sep 01 and Sep 04. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-3725:1` (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/POLOLU-3725:1.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 | [![](https://core-electronics.com.au/attachments/localcontent/0J11047_1191957873f.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11047_17018a2862b.jpg) | |---| | 3pi+ Chassis Kit (No Motors or Electronics). | This chassis gives you everything you need to build your own differential-drive 3pi+ robot based on you own choice of [Micro Metal Gearmotors](https://core-electronics.com.au/components/motors/metal-gearmotors/micro.html) and electronics. Motors are deliberately not included with the kit so that you can pick your own to customized the performance of your robot. The kit includes the following parts: - 3pi+ chassis, with integrated 4×AAA battery holder and ball caster - 3pi+ bumper skirt - two 3pi+ motor clips - two 32×7 mm Pololu wheel hubs and silicone tires - four single AAA battery contacts - two double AAA battery contacts - 1/2"-diameter plastic ball The majority of the chassis is made from white ABS plastic. The 3pi+ chassis has integrated holders designed specifically for Micro Metal Gearmotors, which can then be securely held in place by snapping on the motor clips or the bumper skirt. The included wheels press-fit onto the shafts of the Micro Metal Gearmotors. The 3pi+ chassis also has an integrated rear ball caster socket that the included plastic ball pops into. | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11098_1869620e878.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11098_34098840adc.jpg) \| \|---\| \| 3pi+ Chassis Kit, rear view with motors and motor clips installed in place of the outer skirt (motors not included). \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11055_18289d3d7cd.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11055_34748ee1b8d.jpg) \| \|---\|---\| \| 3pi+ Chassis Kit, top view with motors installed and without outer skirt (motors not included). \| | |---| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11046_161552c4ec0.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11046_3170763e480.jpg) \| \| 3pi+ Chassis Kit, rear view, assembled with Micro Metal Gearmotors (motors not included). \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11048_194042608bd.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11048_36979219124.jpg) \| \|---\|---\| \| 3pi+ Chassis Kit, top view, assembled with Micro Metal Gearmotors (motors not included). \| | |---| The following pictures show what the chassis looks like in profile with and without the bumper skirt: | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11050_4450fa3a34.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11050_1247992f712.jpg) \| \|---\| \| 3pi+ Chassis Kit, front view, assembled with Micro Metal Gearmotors (motors not included). \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11051_67288e6f4b.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11051_177678df6d9.jpg) \| \|---\|---\| \| 3pi+ Chassis Kit, side view, assembled with Micro Metal Gearmotors (motors not included). \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11052_389190c4f6.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11052_107136ac75d.jpg) \| \|---\|---\| \| 3pi+ Chassis Kit, rear view, assembled with Micro Metal Gearmotors (motors not included). \| | |---| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11056_50216ffe64.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11056_13240ef27be.jpg) \| \| 3pi+ Chassis Kit, front view with motors and motor clips installed in place of the outer skirt (motors not included). \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11057_8174618b63.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11057_19596cadd1b.jpg) \| \|---\|---\| \| 3pi+ Chassis Kit, side view with motors and motor clips installed in place of the outer skirt (motors not included). \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11058_5335ddd7f5.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11058_1331198f154.jpg) \| \|---\|---\| \| 3pi+ Chassis Kit, rear view with motors and motor clips installed in place of the outer skirt (motors not included). \| | |---| **3pi+ 32U4 Robots** This chassis works with the [3pi+ 32U4 OLED Control Board](https://core-electronics.com.au/3pi-32u4-oled-control-board.html), and you can add one along with a pair of Micro Metal Gearmotors to make your own 3pi+ 32U4 OLED Robot: | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11319_26835fe0b68.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11319_81768b8d61d.jpg) \| \|---\| \| 3pi+ 32U4 OLED Control Board. \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J11327_266645c7de6.jpg)](https://core-electronics.com.au/attachments/localcontent/0J11327_5728793e6ba.jpg) \| \|---\|---\| \| 3pi+ 32U4 OLED Robot, rear view. \| | |---| This chassis kit and control board are already included as part of the following 3pi+ 32U4 assembled robots and kits: **3pi+ 32U4 OLED versions:** - [3pi+ 32U4 OLED Robot – Standard Edition (30:1 MP Motors), Assembled](https://core-electronics.com.au/3pi-32u4-oled-robot-standard-edition-30-1-mp-motors-assembled.html) - [3pi+ 32U4 OLED Robot – Turtle Edition (75:1 LP Motors), Assembled](https://core-electronics.com.au/3pi-32u4-oled-robot-turtle-edition-75-1-lp-motors-assembled.html) - [3pi+ 32U4 OLED Robot – Hyper Edition (15:1 HPCB Motors), Assembled](https://core-electronics.com.au/catalog/product/view/sku/POLOLU-49754) - [3pi+ 32U4 OLED Robot Kit with 30:1 MP Motors (Standard Edition Kit)](https://core-electronics.com.au/3pi-32u4-oled-robot-kit-with-30-1-mp-motors-standard-edition-kit.html) - [3pi+ 32U4 OLED Robot Kit with 75:1 LP Motors (Turtle Edition Kit)](https://core-electronics.com.au/3pi-32u4-oled-robot-kit-with-75-1-lp-motors-turtle-edition-kit.html) - [3pi+ 32U4 OLED Robot Kit with 15:1 HPCB Motors (Hyper Edition Kit)](https://core-electronics.com.au/3pi-32u4-oled-robot-kit-with-15-1-hpcb-motors-hyper-edition-kit.html) **Original 3pi+ 32U4 versions (with LCD):** - [3pi+ 32U4 Robot – Standard Edition (30:1 MP Motors), Assembled](https://core-electronics.com.au/3pi-32u4-robot-standard-edition-30-1-mp-motors-assembled.html) - [3pi+ 32U4 Robot – Turtle Edition (75:1 LP Motors), Assembled](https://core-electronics.com.au/3pi-32u4-robot-turtle-edition-75-1-lp-motors-assembled.html) - [3pi+ 32U4 Robot – Hyper Edition (15:1 HPCB Motors), Assembled](https://core-electronics.com.au/3pi-32u4-robot-hyper-edition-15-1-hpcb-motors-assembled.html) - [3pi+ 32U4 Robot Kit with 30:1 MP Motors (Standard Edition Kit)](https://core-electronics.com.au/3pi-32u4-robot-kit-with-30-1-mp-motors-standard-edition-kit.html) - [3pi+ 32U4 Robot Kit with 75:1 LP Motors (Turtle Edition Kit)](https://core-electronics.com.au/3pi-32u4-robot-kit-with-75-1-lp-motors-turtle-edition-kit.html) - [3pi+ 32U4 Robot Kit with 15:1 HPCB Motors (Hyper Edition Kit)](https://core-electronics.com.au/3pi-32u4-robot-kit-with-15-1-hpcb-motors-hyper-edition-kit.html) **Dimensions** | Size: | 97L × 96W × 36H mm[1](https://core-electronics.com.au/#note1) | |---|---| | Weight: | 50 g[2](https://core-electronics.com.au/#note2) | **Notes:** 1Of assembled chassis with bumper skirt installed.2Combined weight of all the kit pieces; this does not include motors or batteries. **File downloads** - **Dimension diagram of the 3pi+ Chassis Kit (1MB pdf)** - **3D models of the 3pi+ Chassis Kit (13MB zip)** Note: this model includes [micro metal gearmotors](https://core-electronics.com.au/cat60) that are sold separately from the 3pi+ Chassis Kit. ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_1409.jpg)