Adjustable Idler based on F625ZZ bearings

thingiverse

An adjustable idler to be mounted using a 20x40x1,5mm edge profile on a 2020-beam is engineered with precision. The idler features a holder that securely holds two flanged F625FF bearings in place, a guide that locks the direction of the idler and a knob equipped with a wingnut to adjust the tension on the belt. Printing this adjustable idler was accomplished using PETG material and a 0.6mm nozzle with layers set at 0.2mm (thicker layers could be used). Mounting requires careful attention to detail. First, insert a hex head M4x20mm screw into the bottom of the holder; it should fit tightly within the cavity for the nut. Applying heat and applying gentle force may be necessary. The bearings are mounted onto a M5x30mm bolt and nut with spacers placed between each bearing and holder on both sides. The bearings are secured to the outside by their flanges, naturally. Place the guide as illustrated in the accompanying pictures. Insert the wingnut into the knob and attach the idler assembly to the aluminum profile. Additional reinforcement was applied using superglue to secure the guide to the aluminum frame, ensuring stability. Orientation is determined by a small notch on the guide. A scaled drawing of the aluminum mounting profile (1:1) has been added for reference.