Join Date: Apr 2002
Location: Dandridge (Near Knoxville), TN, USA
Re: Typical 05+ FD failure
Looking at the picture, I feel the aluminum is plenty thick enough there to sleeve it. I would turn the aluminum to approx 23 mm, bore a steel sleeve for press/shrink fit, and then turn the OD to the press fit size needed for the bearing.
One thing: When turning the aluminum down for the sleeve, leave a nice radius at the face, not a sharp corner. Chamfer or radius the end of the steel sleeve to clear it when pressed on. Sharp corners promote stress cracking.
I don't want to achieve immortality through my work...I want to achieve it through not dying.
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.