There are 5 revisions of Original Prusa extruder for MK2.5(S)/MK3(S) and they come with different screws and nuts, as well as different spare bag. Make sure to double check you have all the hardware listed in this table before starting.
| Parts | Quantity | Details | Example Links |
|---|---|---|---|
| Original Prusa i3 MK2.5S or MK3s printer | 1 | Prusa | |
| Dowel pin diameter: 2.90-2.95mm length: 15mm to 15.8mm |
1 | 📌 Cut a M3 screw if you can't find one | |
| M3x10mm socket head screw (ISO 4762) | 14 | McMaster-Carr | |
| M3x14mm socket head screw (ISO 4762) | 4 | for Sunon or Delta hotend fan |
McMaster-Carr |
| M3x18mm socket head screw (ISO 4762) | 14 | McMaster-Carr | |
| M3x25mm socket head screw (ISO 4762) | 2 | McMaster-Carr | |
| M3x40mm socket head screw (ISO 4762) | 6 | McMaster-Carr | |
| M2x12mm socket head screw (ISO 4762) | 2 | McMaster-Carr | |
| M3 Hex nuts (DIN 934) | 14 | McMaster-Carr | |
| M3 Hex nylock nuts (DIN 985) | 4 | McMaster-Carr | |
| M3 Square nuts (DIN 562) | 7 | 1.8mm thick and 5.5mm wide | |
| M3 Steel washer (DIN 125), 0.5mm thick | 5 | ||
| 50mm PTFE Tube1 | 1 | Same PTFE tube than in MK2S, MK2.5 (non-S) and MK3 (non-S). 📌 Check our guide: Trim PTFE Tube |
|
| Zip ties 2.5x100mm | 6 |
Note1 : The printed parts include a PTFE cutter and the assembly will guide you on how to properly trim the PTFE tube. You can check our Trim PTFE Tube guide to ensure you have all the hardware to do it.
| Parts | Quantity | Specifications | Example Links |
|---|---|---|---|
| Nema 17 stepper for X axis LDO 42STH38-1004A100CM |
1 | Datasheet | Prusa |
| Nema 17 stepper for Z axis integrated Lead screw Tr8x8 (P2x4) and nut LDO-42STH34-1004L321E100CM |
2 | Datasheet | Prusa |
| Nema 17 stepper for extruder extruder LDO Cool Power 42STH40-1004ASR |
1 | Datasheet | |
| Bondtech gears | 1 | 1.75mm/5.0mm with its 20mm shaft |
Bondtech |
| Hotend E3D v6 40W heater 0.45mm nozzle |
1 | E3D-Online | |
| Hotend Fan | 1 | Check our recommended fans | |
| Nozzle Fan | 1 | Minimal specifications: - CFM: 3.8 - Static Pressure: 11.3 mmH2O - Bearing type: ball bearing |
Prusa |
| Inductive Sensor | 1 | Diameter of 8mm, length around 35mm | |
| Filament sensor with magnets, steel ball and cables |
1 | 1x IR Sensor: GitHub Prusa 1x Steel ball 7mm diameter 1x Magnet 20x6x2 1x Magnet 10x6x2 |
Prusa |
| 2GT 16T pulley | 1 | 3mm bore |
E3D-Online store |
| 2GT 20T idler | 1 | 3mm bore smooth or toothed Check this optional part for E3D idler |
|
| Extruder spring | 1 | Wire Diameter: 0.8mm Centre Diameter: 4.9mm Free length: 15mm Compressed length: 10mm Material: DIN 2076-B |
Prusa |
| Smooth rods | 2 | 8mm diameter H6 370mm long |
Prusa |
| LM8UU bearings | 3 | Prusa | |
| Gates LL-2GT RF belt | 1 | 6mm width 880mm long |
E3D-Online |
| Nylon cable 2.85-3.00mm diameter 500mm long |
1 | Check 2.85mm filament samples or 2.85mm cleaning filaments |
📌 : You need to have ordered a Prusa printer and need to login on Prusa store to see the articles. You can probably find this hardware from our official distributors
| Parts | Quantity |
|---|---|
| cable_guide_back_a | 1 |
| cable_guide_back_b | 1 |
| extruder_body | 1 |
| extruder_cover | 1 |
| extruder_idler_bondtech | 1 |
| filament_sensor_cover | 1 |
| hotend_collet_clip | 1 |
| x_carriage | 1 |
| x_carriage_back | 1 |
| x_end_idler | 1 |
| x_end_idler_idler_mount | 1 |
| x_end_motor | 1 |