Shimano Crank Spindle Cover for Anodizing

thingiverse

I designed this spindle cover to protect the steel spindle on Shimano's cranks to allow you to custom anodize them. It threads into the end of the crank spindle and you seal the edge that buts up against the aluminum with a silicone caulk to protect it from the acid in the anodizing solution. It is very important that you print this in polypropylene filament or some other filament that is resistant to sulfuric acid.