Original Prusa i3 MK3S+ kit shipping:
USA: Fedex ~$50
EU: DHL/DPD ~10-20€
2 filament spools to US: ~$14
No products
View larger 
Original Prusa i3 MK2.5 to MK2.5S upgrade kit
Upgrade kit for the Original Prusa i3 MK2.5 to Original Prusa i3 MK2.5S. With this upgrade we are introducing a completely reworked extruder with a new filament sensor.
More info: Article at prusaprinters.org
This upgrade kit is no longer available. Production has been stopped on 31.12.2020.
Due to the current COVID-19, pandemic our material supplies and production capacities are limited. In order to keep the production of printers going, we decided to suspend the production of printer upgrades with factory printed parts temporarily. We will resume production as soon as possible.
More info
ALL MMU2 OWNERS WILL GET THIS UPGRADE FOR FREE AS A PART OF MMU2S UPGRADE.
More info: Article at prusaprinters.org
What you will get with this upgrade?
NEW FILAMENT SENSOR
The previous sensor didn’t work well with some specific filaments. The new sensor is using the optical sensor which is triggered by a simple mechanical lever. This sensor doesn’t care about the optical properties of the filament (it can be completely invisible) and cannot die because of mechanical wear.
EASIER SERVICE
Thanks to completely reworked extruder you don’t have to take apart the whole extruder if you want to change the nozzle or PTFE tube. As a bonus, the nozzle and the extruder motor is much closer to the X axis, this means less resonance and better prints too. Better Y axis belt tensioning is just the icing on the cake.
BETTER COOLING
Thanks to the better design of the whole extruder, air flow is increased and as a result, cooling capabilities are improved. We have also focused on cooling of the the printed object and MK2.5S/MK3S is better for printing from flexible materials.
This package includes:
- IR filament sensor + cable
- PTFE tube
- Fan-shroud-black (factory printed from ABS)
- Bolts & fasteners
- Textile sleeve
- 300g Black PETG for self-printed parts
Reviews
no reason not to
The MK2/S were great printers, but the time/money required to upgrade to MK2.5 is a no-brainer decision. Any one of the new features would be worth the trouble. The biggest unexpected benefit is full support in latest firmware/slicer--the old MK2 is a software orphan, but not the MK2.5
- 6 out of 6 people found this review useful.
having cooling issues
the kit was great. the instructions were great. required several hours to completely rebuild the extruder, but i'm used to that.
while I was looking forward to the upgraded filament sensor, and increased cooling, i'm finding that the cooling is a bit too much. i haven't been able to print many jobs because the printer will shut itself down when the print fan comes on - not able to keep the hot-end within 15C of the target temp... Struggling at the moment.
- 1