Originally Posted by bemiiten
I noticed this little bite out of one of locating pin bores. The trans housing precludes setting your drift for a straight shot. Had to use a smaller 3/16 drift at a angle and it resulted in this. BMW must have a offset drift for this as I recall it didn't make sense to drive the pin from the opposite side. Anyway this picture is after I removed a small aluminum burr.
What am I looking at here? Is this a spherical head pin? Used to drift the case halves apart?
If so, next time (you may rebuild one for a friend) put a inverted cone shape on the drift. Use a piece of cold-rolled rod the diameter you want and face drill it for the inverted cone shape. And radius the circumference of the face on a stone wheel.