I have just bored some 52mm dia holes for bearings in Aluminium . I have been boring these holes on a regular basis and use a template to leave sufficient in for a press fit , I also double check that the bearing does not go in the hole on every component . These components have just returned from Anodizing and the bores are loose the bearings drop in the hole , Is there anything in the Anodizing process that could cause this ? These components can be saved by boring and sleeving but in all the years of doing these parts I cannot accept that this is my fault after being so careful after checking and double checking .