Rat Rig V-Core 4.1
Rat Rig V-Core 4.1
Rat Rig V-Core 4.1
Rat Rig V-Core 4.1
Rat Rig V-Core 4.1
Rat Rig V-Core 4.1
Rat Rig V-Core 4.1
Rat Rig V-Core 4.1

Rat Rig V-Core 4.1

€796,82

Shipping calculated at checkout

V-Core 4.1 is a large-format, open CoreXY 3D printer kit designed to grow with you.

With build volumes up to 500 × 500 × 500 mm, a fully open and
customizable architecture, and a progressive upgrade path — from single
tool to Hybrid and IDEX — it’s a platform you can adapt, expand, and
make your own as your needs evolve.

NOTE: Enclosing panels are not included. DXF files available here.

Buying Guide

The V-Core kit is now easier than ever to configure We’ve streamlined your options into clear, modular bundles:

Machine Kit: Includes all structural, mechanical, and motion components, including all the bed elements (bedplate, flexplate and heater) This is the core of your build

Electronics Kit (optional): A complete bundle with every electronic component needed for our standard build (motors, controllers, hotend, extruder, fans, wiring & connectors)

Upgrade Kits (optional):

  • Hybrid Kinematics – unlocks extra performance
  • IDEX – allows for multi-material printing and copy and mirror modes (Hybrid is a pre-requisite for IDEX)
  • Rat Pack – keep the air clean inside the chamber with this powered air filter (printed parts not included)

The Beacon probe and wiring kit are not currently available for purchase separately

For full detail of what’s included in each product module, navigate to the Bill of Materials here

In stock
Select the size:
300 400 500

V-Core 4.1 Documentation Hub

Files
Guide
Commissioning

A Next-Gen CoreXY 3D Printer Kit

v-Core 4.1

Watch Video

Up to 500mm

Open System

Peak Performance On Larger Machines

Perfect First Layer

Less Time to Print Multiple Parts

Pre-made cables & no crimping required

3 Build Volumes

300 x 300 x 300mm
400 x 400 x 400mm
500 x 500 x 500mm

Progressive Upgrade Path Modes

Easily upgrade standard into Hybrid and then Hybrid into IDEX - Conversion between modes is just a matter of adding a few parts, no frame rebuild is necessary.

Standard - Great performance, simpler than ever build process
Hybrid - Ludicrous performance: double your y axis acceleration
IDEX - Print with 2 materials and double your output for 2 parts at once or for multi-material parts

Peak Performance On larger machines

Experience Unbeatable Performance on Even the Largest Machine Sizes

Less Time

To print multiple parts

Cut print time in half for multiple identical parts with the IDEX upgrade kit

Purchase here

1. Multi-material printing ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎2. COPY MODE ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎3. MIRROR MODE

Easy Build, Easy Setup

For V-Core 4.1, the entire build documentation was created anew — with fully structured, end-to-end, step-by-step guides that walk you through the complete assembly and commissioning process.

Every step is intentional, clearly explained, and designed to make building the machine straightforward and predictable.

Perfect 1st Layer with the Beacon

Auto Z calibration compatible with any print surface via Beacon Contact.

The fastest, most precise & accurate probe on the market.

Open system

A fully open-source 3D printer puts you in control. With complete CAD files available, you’re free to modify, upgrade, or repair every part to fit your exact needs.

V-CORE 4.1 - NEW FEATURES

A steel X-axis gantry, full-metal toolhead, improving rigidity, cooling, and print consistency, unlocking smoother, more reliable performance with RatOS 2.1.

Faster assembly. Simpler maintenance.

Steel X-axis gantry

improved part cooling

Full-metal skeleton toolhead

Designed for real-world use

FULL METAL MOTION SYSTEM

High grade Steel Linear Rails on every axis

STURDIER Z-ARMS

8mm thick beds on 400 and 500 sizes

UNIVERSAL FRAME

DROP IN IDEX FEATURES

UNIVERSAL FRAME

included steel base plate

electronics enclosure

electronics enclosure

endstop

Self Enclosed Design
Technical Specifications
IDEX BUILD AREA per TOOLHEAD

Documentation

Build guide:
Step-by-step guide available here .

CAD Models

300 400 500
CoreXY View View View
Hybrid View View View
IDEX View View View

Community

Rat Rig 3D Printer Community (Facebook)

discord.gg/ratrig

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International

This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator. If you remix, adapt, or build upon the material, you must license the modified material under identical terms. CC BY-NC-SA includes the following elements:

BY: credit must be given to the creator.
NC: Only noncommercial uses of the work are permitted.
SA: Adaptations must be shared under the same terms.