Direct Drive Extruder Tension Lever

thingiverse

I needed a slight redesign for my direct drive extruder. Since my stepper design is different, I do not need a relief near the bearing mount. Derived from several excellent designs on thingiverse such as "QU-BD Extruder Modifications bdring". Instructions I used 624HZZ A5 bearings. Mounted with 10x4mm pan head screw. To keep the screw from backing out, I usually apply some superglue. 1 small hillman 4mm flat washer. Clean out the pivot mounting hole so that a 6x32 bolt fits into the hole snugly but allows free rotation (#28 drill). **Note. For mounting directly to a NEMA 17 stepper, change the bolt to the appropriate M3-.50 screw. I use 10x32 since I don't mount my bearing tension lever directly to the motor, I mount to the adaptor that I created for the gearhead motor that I use. Clean out the bolt holes for the bolts that guide the pressure springs(#37 drill). Tap with 6x32 tap. Install two 6x32 hex head bolts to guide and hold the pressure springs. **-Note in earlier instructions I accidentialy had 10x32 bolts instead of 6x32. Those are much to large.