Kyle Boatright wrote:

"Boelkowj" wrote in message
...
Can anyone advise me how I should clean up a 5/16th reamed aluminum hole
to
eliminate stress fractures. Is the process called "burnishing" and how is
it
done? Will fine grade sandpaper work. This is an important wing fitting.
Thanks.

Larry

Other than deburring the edges, I wouldn't do any further work to a reamed
hole. It should be very smooth in the first place.

KB

Yeah. If you are at final size hole and have detectable cracks,
Doitover....