Introducing the Original Prusa MK4 3D printer & MK4S upgrade kit, a powerful machine capable of creating high-quality prints with intricate details. The Prusa MK4 prioritises safety and durability and is great for both manufacturing and home use.

This 3D printer from Prusa means that high-speed printing is made effortless, as Pressure Advance and Input Shaper technology is included in the firmware of the MK4. This is used to accurately predict the filament’s flow and prevent any resonance in prints. Print time is thereby decreased by up to 70% when compared with the MK3.

With a build volume of 250 x 210 x 220mm, the expansive build area of the Original Prusa MK4 allows you to print large-scale projects without having to worry about running out of space.

Designed to prevent inconvenience, the precision of the Loadcell sensor, for example, enables you to print a smooth first layer consistently and automatically, without needing any input from the user.

Giving you even more flexibility when it comes to choosing what to 3D print, the Prusa MK4 supports an extensive range of filaments (PLA, PETG, ASA, flexible filament, Polycarbonate and Polypropylene).

Simple to use, the Original Prusa MK4 3D printer features a 3.5” graphic 65k colour screen with a user-friendly interface that supports QR codes. For added convenience, the footer panel of the display can even be customised. The RGB status bar allows you to be more in control of your prints too. The self-developed multiplatform slicer, PrusaSlicer, streamlines the slicing process, enabling you to get printing faster.

Please note: this MK4 printer is the assembled version.
The included free MK4S Upgrade Kit is unassembled - We can unbox and upgrade to the MK4S for free by our Prusa Authorised Technician - this will not affect your warranty. Please contact us via email at info@123-3D.co.uk before purchase or give us a call on 0333 325 0011.

• Original Prusa MK4 3D Printer x1 - full details
• 123-3D Black PLA Filament 1.1kg x1 - full details
• Free MK4S Upgrade Kit Included

Technical Parameters

• Dimensions with the LCD mounted outside: 530 mm (w) × 545 mm (h) × 715 mm (d)
• Dimensions with the LCD inside: 530 mm (w) × 545 mm (h) × 640 mm (d) At least 250 mm is required in front of the enclosure for the doors to fully open
• Enclosure type: Passive, heating provided only by the 3D printer’s heatbed
• Weight: 10,6 kg (23.4 lbs)
• Max stackable units: up to 5 (with more than 3 enclosures, anchoring to a wall is recommended)
• The basic package contains: All components required to build the enclosure (frame parts, transparent side panels, top and bottom panels, mounting material, printer frame brace), temperature sensor, and documentation. Handles and optional 3D-printed accessories seen in some photos are not included in the package.

What is Multi Material Upgrade?

It’s exactly what it sounds like - it’s an optional add-on that allows your single-extruder printer to print with up to 5 colors (materials) at the same time. The MMU3 contains five filament insertion points. Load up to five colors of your choice, slice the object in PrusaSlicer and start the print. The system automatically selects filament using the selector, loads it into the extruder and the printer starts printing. When it’s time to change the color or material, it also happens automatically.

 

What's new in MMU3?

• Completely new firmware written from scratch
• Full two-way communication with the printer, Compatible with the MK3.9 and MK4
• LCD screen integration (status messages, real-time information, error codes)
• All plastic parts were redesigned with a focus on easier assembly and maintenance
• New metal parts to make the unit more robust and reliable
• Improved electronics

Efficient multi-color printing

Every time you switch filaments, you need to purge the previous material from the nozzle to prevent cross-contamination. There are various ways to do it and the MMU3 uses an efficient “wipe tower” - it’s a compact, partially hollow block next to the printed object where the filament is purged and the pressure in the nozzle is stabilized. All filament goes into one location and you don’t need to worry about bits of plastic piling around your printer.

We’re offering multiple ways how to save filament and reduce plastic waste - PrusaSlicer gives you options for “wipe into infill” (the printed object’s infill is used as a wipe tower) or you can use “wipe into object” where another object is used as a wipe tower - it will be very colorful but if you, e.g., need a functional part or you will paint it later, it’s a great way to reduce plastic waste to a minimum.

Please note: this product is a kit version of the Original Prusa MK4 and requires assembly.

A fully assembled version of the Original Prusa MK4 is also available via 123-3D.

Introducing the latest version of the 3D printing powerhouse from Prusa, the Original Prusa MK4 + MK4S upgrade kit. This powerful 3D printer includes all the safety and reliability features of its predecessor but also sports fast performance, allowing you to print more in less time.

New features include quick-swap nozzles, remote printing, one-click printing and a Loadcell sensor. This sensor ensures a consistently smooth first layer without the need for manual adjustment. The Original Prusa MK4 also prints up to 70% faster than the MK3 thanks to Pressure Advance and Input shaper technology.

The potential of this printer is supported by an impressively spacious build volume of 250 x 210 x 220mm, allowing you to print large-scale projects. Additionally, with a maximum heatbed temperature of 120°C and a maximum nozzle temperature of 290°C, the MK4 can work with PLA, ASA, PETG filament and more. Finally, the colour LCD screen with an intuitive UI supports QR codes and G-code thumbnails, for greater ease of use.

• Original Prusa MK4 3D Printer Kit x1 - full details
• 123-3D Black PLA Filament 1.1kg x1 - full details
• Free MK4S Upgrade Kit Included

The Prusa Nozzle ObXidian is a high-quality nozzle designed specifically for Nextruder. It is made from hardened steel with a corrosion-resistant coating, ensuring exceptional durability and longevity. These nozzles are particularly suitable for printing with abrasive materials like carbon fiber, as they maintain their hardness even at higher temperatures, delivering excellent performance and extending the lifespan of your nozzle.

This product includes:

• 0.6mm Prusa Nozzle ObXidian (1x)

The Prusa Nozzle ObXidian is a high-quality nozzle designed specifically for Nextruder. It is made from hardened steel with a corrosion-resistant coating, ensuring exceptional durability and longevity. These nozzles are particularly suitable for printing with abrasive materials like carbon fiber, as they maintain their hardness even at higher temperatures, delivering excellent performance and extending the lifespan of your nozzle.

This product includes:

• 0.4mm Prusa Nozzle ObXidian (1x)

• 0.6mm Prusa Nozzle Brass x1

• 0,.4mm Prusa Nozzle Brass x1

This contains:

• Lock housing nut: 1pc
• Lock housing: 1pc
• E-clip washer: 2pcs
• Lock: 1pc
• Keys: 2pcs

• Lock (1pc)
• Mechanical Lock Rod (2pcs)
• Mechanical Lock Lever (1pc)
• Handle with lock hole (1 pc)
• Lock Door Holder A (1 pc)
• Lock Door Holder B (1 pc)
• Lock mount (1 pc)
• Lock cover (1 pc)
• Rod guide (2pcs)
• Rod latch (2pcs)
• Lock wrench (1 pc)

The MK52 heatbed has embedded high Curie temperature magnets. These magnets are able to firmly hold removable spring steel sheets.

The Satin sheet further expands our line-up of print sheets. In terms of printing properties, the Satin sheet sits between the smooth and textured variants. Its powder-coated surface with lightly textured matte finish offers an optimal level of adhesion, especially when printing PLA and PETG materials. It is fully compatible with a wide range of common and less-common filaments, such as ABS, ASA, FlexFill 98A, Polycarbonate and more. A vast majority of materials can be printed without a separation layer (e.g. glue).

Polycarbonate - prints better on satin (compared to smooth and textured sheets) - when printing with PC often, glue stick layer is recommended to prevent possible damage to the sheet.

WARNING:

Never clean the Satin powder-coated spring steel sheet with acetone! Doing so will create microfractures in the texture, which will make the surface deteriorate over time.

Note: Consumable parts, such as PEI sheets (smooth, textured, etc.) are not covered by warranty as the coatings are designed to diminish over time unless failure has occurred due to a defect in materials or workmanship. Cosmetic damage, including but not limited to scratches, dents, cracks or other cosmetic damage is also not covered by the warranty. Only defective sheets on arrival are covered by warranty.

• Higher flow! Increased surface area contact with the filament boosts the volumetric flow rate significantly compared to our stock Prusa brass nozzle
• Reduce print times and increase nozzle lifetime
• Durable against abrasive materials such as carbon-fibre
• Benefit from non-stick properties of the custom E3DLC ™ coating

• Sizes: 0.4mm – 0.6mm
• Input diameter: 1.75mm
• Max temperature: 300°C
• Compatibile with Nextruder
• High flow ready
• Abrasion resistance

The MK52 heatbed has embedded high Curie temperature magnets. These magnets are able to firmly hold removable spring steel sheets.

Powder coating directly on metal makes it very hard to damage this build plate. If a heated nozzle crashed into it, the metal can dissipate the heat. Powder coating also gives the surface a distinct textured look that will be visible on your prints. The textured surface hides most of the mechanical damage caused by tools. Only the top of the small bumps can be scratched, which will not imprint on the bottom of the model. 

WARNING:
Never clean the Textured PEI Powder-coated spring steel sheet with acetone! Doing so will create microfractures in the PEI texture, which will make the surface deteriorate over time. 

Note:
Consumable parts, such as PEI sheets (smooth, textured, etc.) are not covered by warranty as the coatings are designed to diminish over time unless failure has occurred due to a defect in materials or workmanship. Cosmetic damage, including but not limited to scratches, dents, cracks or other cosmetic damage is also not covered by the warranty. Only defective sheets on arrival are covered by warranty.

Compatible with: MK3S, MK3, MK2.5S, MK2.5, MMU2S, MK3S+, MMU2, MK4, MK3.9, MMU3, MK3.5, MK4S, MK3.9S

The MK4->MK4S Upgrade Kit contains everything you need to fully upgrade your stock MK4 3D printer to the new MK4S.

The upgrade is supplied as a kit - you need to assemble it yourself. Before you order the upgrade, please check which xLCD your printer came with. This upgrade is for the new version of xLCD.

Every Original Prusa 3D printer receives long-term support for years after launch. Not just small bugfixes, but major firmware and hardware upgrades that bring useful new features. And MK4 is no exception.

Compared to the Original Prusa MK4, the MK4S brings the following innovations:

• New high-performance 360° cooling system
• High-quality high-flow nozzle as standard
• Native iOS/Android Prusa app for iOS and Android with easy Wi-Fi setup with an NFC tap
• Improved print speed
• Improved print quality
• New parts printed from Prusament PC Blend Carbon Fiber or injection molded
• Optional accessory: GPIO hackerboard
• Optional accessory: accelerometer for printer modders

If you love modifying your 3D printer, adding new features, and tweaking it to your liking, our accelerometer module for printer developers and modders will surely come in handy! With it, you can easily measure the resonance frequency of each axis and recalibrate your Input Shaper to the optimal values, ensuring your modded 3D printer operates with maximum efficiency.

Our printers come from the factory with pre-configured, optimized Input Shaper values that have been collected and fine-tuned across many of our machines. Therefore, with a standard stock printer, you won’t ever need additional tuning, as any potential improvement after recalibration would be rather insignificant.

However, some modifications, such as a mod on the Nextruder, can impact the printer’s construction to the extent that the original Input Shaper values are no longer valid. You can then easily use our accelerometer to recalibrate it. Simply plug it into the xBuddy board using the connector on the back of the MK4S 3D printer, attach it to the printhead and the heatbed, and perform a full recalibration of the Input Shaper.

Although this tool is intended for modders and developers, installing the accelerometer on the printer and using it is very easy.

Compatible with: MK4, MK3.9, MK3.5, MK4S, MK3.9S

The GPIO module is an excellent tool for modders, hackers, and tinkerers who love adding new features to their 3D printers. It connects to the I2C port on the xBuddy board of your Original Prusa MK4/S, MK3.9/S, or MK3.5/S, enabling you to control and receive input from external devices.

You can create a trigger for your camera to capture precise timelapse photos, control external LED lighting to alert you with different colors when the printer has finished printing or requires attention, adjust fan speed, control servos, activate enclosure functions, and much more—you name it! All you need is a connected GPIO module and a custom G-code command, which can be executed at a specific layer, at the start or end of a print, or during other events. You can set all commands directly in PrusaSlicer.

You can also integrate a button or macro keyboard and assign each key to execute specific G-code scripts, stored in the printer’s USB drive, allowing you to control various printer functions, such as setting the printer to a ready state, managing the print, adjusting temperatures, or executing other actions.

Compatible with: MK4, MK3.9, MK3.5, MK4S, MK3.9S

• Knife tip: for cutting support material
• Needle point: for clearing small holes
• Spoon tip: for removing wires and smoothing surfaces
• Standard tip: for general use

• Knife tip: for cutting support material
• Large blade point: for cutting support material
• Needle point: for clearing small holes
• Standard tip: for general use
• Spoon tip: for removing wires and smoothing surfaces
• Large spoon tip: for removing wires and smoothing surfaces
• Detail point: for updating detail work
• Ironing point: for levelling surfaces
• Countersink point: for countersinking holes
• Insertion point: for inserting metal parts

• The versatile Modifi3D post-processing tool
• Needles to clear a clogged 3D printer nozzle
• Superlube to keep your 3D printer in optimum condition
• 3D print post-processing set to keep everything neat and clean
• Digital caliper for fine calibration of your 3D printer
• A putty knife to easily remove printed objects from the print bed