Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
Parallel-Flexure Sprung Belt Tensioner
A spring-loaded drivetrain belt tensioner for 2020 extrusion. Two parallel 2 mm flexure blades let the idler block slide sideways without tilting, and an 8.3 mm bore takes an M8 bolt carrying stacked 608 bearings as the roller. Slide the base along its two 12 mm M5 T-nut slots to push the roller into the belt. The blades then act as the spring and take up slack as the belt stretches. The whole part is 104 x 24 x 12 mm.
608 Flat Belt Idler Pulley
A 68 mm OD flanged flat idler pulley that runs on two press-fit 608 bearings (22.05 mm pockets, 7 mm deep, top and bottom) instead of a molded plastic sleeve, with a 16 mm flat belt face sized for 1/2 in V-belt backsides and 4 mm flanges to keep the belt tracking. Replaces seized or shattered deck/tensioner idlers on mowers, snowblowers and belt-driven robot drivetrains; ribbed rim and hub keep it under ~40 cm³ and print it without supports.