Colchester Student Lathe Carriage Lock Knob

cults3d

I made this knob just to keep me from having to grab a wrench everytime I need to lock my lathe carriage for parting off for example. Used PETG for the part and printed it with 100% infill, but as locking the carriage on my old colchester student lathe doesnt need that much torque to be secured in place, I guess it would have worked with less infill too. The bolt's size is about 11.08 to 11.09 mm on the square head, so I made the 3D-printed counterpart 11.2 mm just to compensate for the shrinking of the part while printing. Turned out to be a perfectly snug fit. Made the peripheral holes only to save filament and for some extra style points :)