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Home Model download Printer partsANYCUBIC i3

X-Belt Tensioner for Anycubic Prusa i3 - no unwanted Z-axis loading!

This model is designed by Quas7 (, thank you very much for your great support. For details, please see the description below:


Simple and effective X-belt tensioner to get rid of tensioning springs on the belt WITHOUT loading the z-axis perpendicular (sideways).

The counterforce is directly supplied by the x-axis rails and not by the z-axis rails, like in many other cases, as the M4 bolts are placed on the faces of the two metal x-axis rails.

additionally needed:

2 M4 nuts

2 M4 bolts (>20 mm)

I uploaded a new version with rounded corners, strenghtend guide base and an Anycubic marking on the side.

Print Settings

Printer Brand: Prusa

Printer: Prusa Clone

Rafts: Doesn't Matter

Supports: Doesn't Matter

Resolution: 0.2mm

Infill: 25%


6 Walls @0.4mm nozzle

printed with ABS E:246°C, B: 105°C

Printed pulley fixture pointing downwards without any support or raft