About this 3D model
I needed this belt tensioner as a Solidworks model for another project and this is what I came up with. The parts are almost exactly the same as http://www.thingiverse.com/thing:10274 but I made the tensioner 0,5mm taller to allow for fillet edges. I do not accept the Thingiverse terms and conditions so the Solidworks part files are available here https://github.com/KaiserSoft/3D-Printing