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KP3S PRO S1 Dual Rail Z-Axis MOD

Creation quality: 5.0/5 (1 vote)
Evaluation of members on the printability, utility, level of detail, etc.


3D model description


WARNING! Only tested with KP3S PRO S1 that has Y-axis linear rails and not v-wheels.


This modification requires removing the power supply to attach extension screws to the side of the printer. But to remove the power supply's screws you need to remove the 2020 profiles that hold the heat bed as two heads of the screws go slightly under them.

The MOD is designed with bigger screws so it will need drilling to widen the ends of the side vents where the M5 bolts go. You could use M4 bolts, they don't require drilling but can be harder to align things. Plus you will require a narrower X-axis belt tensioner knob. It is a hard mod to make (recommended only for advanced modders)!


1x 2040 profile 350mm
1x 2020 profile 280mm
2x 2040 corner angle bracket
1x 250mm MGN12H (must slide without binding)


To attach the 2040 profile to the printed bracket:
3x M5x45mm ISO7380 Hex Socket Button Head screw
4x M5X16mm ISO7380 Hex Socket Button Head screw
7x M5 T-track sliding block square nut for 2020 profile

To attach the main printed part to the 3d printer frame:
(Using M5 screws here will require widening ends of the vents by drilling, M4 doesn't but could be harder to align)
6x M5X16mm ISO7380 Hex Socket Button Head screw
12x M5 nuts
18x M5 wide washers

To attach the carriage of linear rail to X axis:
4x M3x16mm DIN912 socket head screw
2x M4x10 DIN912 socket head screw
2x M4 regular washer
2x M4 lock washer

To attach all profiles with the corner brackets:
8x M5X10mm ISO7380 Hex Socket Button Head screw
8x M5 T-track sliding block square nut for 2020 profile

3D printer file information

  • Design number: 1145259
  • 3D design format: STL Folder details Close
    • End_X_axis_Coupler_to_MGN12H_Rail.stl

    Learn more about the formats

  • Publication date: 2023-03-31 at 23:04
    Published to Thingiverse on: 2023-03-31 at 07:24


CC BY-NC - Attribution - Non commercial


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