Belt tensioner for K40 Z-Axis table

thingiverse

I really liked this design. I did not have a smooth-bearing pulley for the belt tensioner. I did have an extra 608 ZZ bearing so I designed and printed an attachment that utilized this bearing as the tensioner pulley.It fits under the lower 1/2" bar and is at the right height to tension the belt. I put it on the inside but if you needed to have the table go lower, I think it would work on the outside also.It requires one extra 5/16" bolt and nut.I used supports on the knob and printed everything in PLA.I did not have enough 1/2" steel tube for the top so I made some 1/2" wood slats. Seems stable enough.