My New Prusa i3 Rework X and Y Belt tensioners

thingiverse

Here is a new way to tighten the belts by using the nuts that capture to pull the bearings outward. The X tensioner was designed to work with the X Bearing, http://www.thingiverse.com/thing:372056, found online. 6/16/2015 Update: A newer version of the X idler bearing, X Idler 608 V4, is added which allows the x idler bearing to be pulled further into the Z rods bracket for a tighter fit. Instructions: Using new belt tensioners: To apply tension to your bearings you'll need to get your hands on several parts, including an 608 Bearing, 5/16" x 1 1/8" Bolt (for Y Bearing), and another one of those same bolts but only slightly longer at 5/16" x 15/16", all this in addition to the tensioner, which consists of two identical bolts measuring 5/16" x 2 1/2" each.