Anet A8 (Prusa i3) X-Axis Belt Tensioner

This is a X-Axis belt tensioner compatible with Anet A8 (and other Prusa i3) 3D printers.

  • It does not require longer belt
  • It does not hit the extruder when at X_MAX
  • You can use toothed GT2 16 tooth pulley (with 3mm hole) with it. But you can also use the stock smooth pulley.
  • It uses the X rods for support, and does not bend the Z rods
  • Open source design, designed in Blender

Download from: and don’t forget to upload “I made one” photo!

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