Original Prusa MK4S Reliable High-Speed Workhorse
Loadcell-first layers, input shaping, and high-flow cooling give you print-and-go reliability from PLA through PC—without constant tinkering.
Key innovation: Loadcell-assisted mesh leveling plus 360° cooling and a CHT-style nozzle maintain first-layer consistency while pushing higher flow rates.
Engineered for Dependable Output
The MK4S keeps jobs on track with a rigid i3 frame, quiet 0.9° steppers, and a 32-bit xBuddy board tuned for input shaping and pressure advance. A magnetic PEI bed swaps fast between smooth and textured finishes, while the Nextruder’s direct drive handles flexibles cleanly.
- Build volume: 250 × 210 × 220 mm; PEI spring steel bed to 120°C.
- Hotend: All-metal up to 290°C; CHT-style 0.4 mm nozzle for higher volumetric flow.
- Connectivity: Ethernet, Wi‑Fi, USB-C with PrusaLink/PrusaConnect remote monitoring.
- Ready for MMU3 (5-filament) to add multi-colour and soluble supports.
Why Choose It
Pick the MK4S when uptime, first-layer accuracy, and predictable profiles matter more than flashy speeds. Need enclosed ABS/PC capability? Step up to the Prusa Core One. Planning larger multi-material parts? Consider the Original Prusa XL or its 5-head upgrade path.
Applications for AU/NZ Teams
Functional Prototypes
Mechanical parts that need dimensional accuracy without ringing.
Jigs & Fixtures
Production aids where consistent first layers prevent warp and rework.
Education & Labs
Kit teaches mechanics; assembled units run hands-off with proven profiles.
Multi-Material Concepts
Pair with MMU3 for colour-coding parts and soluble supports.
Technical Parameters
View full parameters
| Motion & Build | |
| Build Volume | 250 × 210 × 220 mm |
| Levelling | Loadcell-assisted mesh bed leveling |
| Bed | Magnetic PEI spring steel, 120°C |
| Extrusion | |
| Hotend | All-metal, 290°C max |
| Nozzle | CHT-style 0.4 mm high-flow |
| Extruder | Nextruder direct drive |
| Performance | |
| Input Shaping | Tuned firmware for reduced ringing |
| Materials | PLA, PETG, TPU, ABS, ASA, PC (open frame) |
| Connectivity | |
| Interfaces | Ethernet, Wi‑Fi, USB-C; PrusaLink/Connect |
| Display | 3.5″ colour LCD |
Frequently Asked Questions
Kit or assembled?
Both available. Kit offers learning value; assembled arrives calibrated for faster deployment.
Does it handle flexibles?
Yes—direct drive and short filament path suit TPU. Slow to moderate speeds improve consistency.
Can I add multi-material?
Yes, add the MMU3 for up to five filaments (colour or soluble supports) using tuned Prusa profiles.
Prusa MK4S Overview Video
Proof Points & Visuals
Fast & Precise
360° cooling, high-flow nozzle, and tuned firmware deliver higher accuracy and speed.
Surface Finish & Accuracy
Top-tier surface quality and dimensional accuracy confirmed in third-party reviews.
75° Overhangs
360° cooling enables steep overhangs with fewer supports, saving time and material.
Solid & Durable
High-flow nozzle and fan keep layer adhesion strong on production parts.
Workflow & Remote Control
Ethernet/Wi‑Fi with Prusa Connect for secure remote monitoring and queuing.
Advanced Materials
Handles PLA, PETG, ASA, carbon-filled filaments, and TPU; enclose for ABS/PA.
Extended Technical Parameters
View extended specifications
| Measurements | |
| Build Volume | 250 × 210 × 220 mm | 9.84 × 8.3 × 8.6 in |
| Filament Diameter | 1.75 mm |
| Layer Height | 0.05–0.30 mm |
| Printer Dimensions | 7 kg, 500 × 550 × 400 mm |
| Electronics | |
| Mainboard | Custom 32-bit xBuddy (STM32) |
| Drivers | Trinamic 2130; 0.9° X/Y motors |
| Extruder | |
| Extruder | Nextruder direct drive, 10:1 planetary |
| Nozzle | High-flow brass CHT 0.4 mm |
| Cooling | High-performance turbine, 360° cooling |
| Temperatures | |
| Nozzle Max | 290 °C |
| Heatbed Max | 120 °C |
| Controls & Connectivity | |
| Display | 3.5″ graphic colour screen |
| Connectivity | NFC, Ethernet, optional ESP Wi‑Fi; USB/LAN/Prusa Connect |
| Sensors & Safety | |
| Sensors | Filament, loadcell, power panic, thermistors, fan RPM |
| Print Surface & Materials | |
| Surface | Magnetic heatbed with removable PEI steel sheets |
| Materials | PLA, PETG, Flex, PVA, PC; with enclosure: ABS, ASA, HIPS, PA |
| Power | |
| PSU | 240W Delta with Power Panic HW |
| Consumption | ~80W PLA / ~120W ABS settings |
Basic Package Includes
- Original Prusa MK4S printer
- Prusament PLA Prusa Galaxy Black 1kg
- Smooth PEI print sheet
- Alcohol wipes and nozzle acupuncture needle
- Toolset (uni-wrench, nose pliers, Allen/Torx keys)
- USB drive with sample G-codes
- Spool holder
- Prusa lubricant for bearings
- 3D Printing Handbook
Need setup or profiles? AddLabs Sydney provides local warranty support, material tuning, and MMU3 guidance. Call 02 9161 4164 to plan your build.