Y-belt holder and tensioner for MK3 and Bear MK2, MK2.5, and MK3
Motivation There's a lot to love about the Prusa printers, but the Y axis belt line is not one of them. A 16T pulley on the motor, a 20T pulley on the idler, and an offset going through the belt holder introduce Z axis forces on your bed as it traverses along Y. These parts allow you to use a 16T idler and get a perfectly parallel belt line, keeping the bed more level as it travels. User RHDreambox designed replacement parts to fix this on the stock MK3, but relies on quality assembly to achieve belt tension. These parts provide adjustment via screws. Built for Bear User pekcitron designed an excellent frame replacement for modern members of the Prusa i3 family of printers. He's also built... This hosted file keeps creator credit and license details.
Print details
- Difficulty
beginner
- Materials
PLA suggested; confirm scale and supports in your slicer before printing.
Download files
- belt-holder_mk2_mk25.stl
STL · 640.3 KB
Download - belt-holder_mk3.stl
STL · 640.3 KB
Download - y-idler_mount_stock-mk3.stl
STL · 350.1 KB
Download - y-idler_mount_tslot.stl
STL · 262.4 KB
Download - y-idler_mount_vslot.stl
STL · 262.0 KB
Download - y-idler_slide.stl
STL · 380.6 KB
Download - y-idler_slide_stock-mk3.stl
STL · 380.7 KB
Download - zbrozek-y-axis.zip
ZIP · 10.5 MB
Download
File metadata
- belt-holder_mk2_mk25.stl
SHA-256:
38fc88665310e154a8daa9d7a499f1d03d9698c01d8a3d1d56f1a0ce2f0cfdcf - belt-holder_mk3.stl
SHA-256:
b1c14277d76cbadb04f97aa39c7df0afbda203c035f2da3999626a8e48e1703f - y-idler_mount_stock-mk3.stl
SHA-256:
4a7661708951e7bb65a61db270862890d11843918d66416a27f3925b684c1364 - y-idler_mount_tslot.stl
SHA-256:
05cf3a948dc3b6e398e2d05263fc0d6cd86374cefdd5909e03bb28c4405049cc - y-idler_mount_vslot.stl
SHA-256:
6a056455ac53d8ebe4529bc3b78bb48a967a160444a61ab520bb3d0f8716ae56 - y-idler_slide.stl
SHA-256:
e291def5b2648314651739ae4eff923926470cf91d834777a54513a918908a07 - y-idler_slide_stock-mk3.stl
SHA-256:
33ae938c4a98a02d3bde87c6c7bdf3a966fd6cb52fde86fe714c5d0f0f564361 - zbrozek-y-axis.zip
SHA-256:
1f71dd2ee4af3308f023db69f9a09ef8f8e78c49daa025d20ad9cd35e18495bb
Attribution
Y-belt holder and tensioner for MK3 and Bear MK2, MK2.5, and MK3 by zbrozek (the original source). License: Creative Commons CC0 1.0. Source: the original source