Firstly, yes I rode too far with loose cranks. Yes the tapers are damaged. Yes I threadlock the bolt when I have some to hand. No, it still comes loose eventually...
Middleburn RS8 square taper cranks on Shimano UN?? BB keep coming loose on driveside. Upon tightening cranks up yesterday mid ride, they have drawn too far up the spindle and are now just interfering with the BB end (not frame). BB had to be as narrow as possible to help chainline issues, and it was always super close - I'm guessing fractions of a mm here.
Any ideas on how to 'pad' out the crank to increase the clearance? I recall some 'pro-tip' mentioned in a LBS way back: grease mixed with talc, that set hard under pressure. Idea was to fill any tiny gaps between crank taper and spindle. Anybody tried similar?
Other option is to file down the outer edge of the BB cup or the inner edge of the Middleburn lock nut, but I'd rather get the crank sitting further out. Final option is to fit a longer BB, but then I'd have chainline issues again.