On Sun, 17 Jul 2011 23:29:33 -0400, Tom Gardner mars@tacks wrote:

On 7/17/2011 10:51 PM, Dennis wrote:
I'd agree. I was taught not to even clean bolts using a powered wire brush.

I can't imagine degrading non-critical bolts with a wire wheel enough to
matter. I do make special brass knot-type brushes for Sikorsky rotor bolts.

Are they used to clean up dirty threads before they're unbolted
through an expensive and critical casting/machining?

--
Life is an escalator:
You can move forward or backward;
you can not remain still.
-- Patricia Russell-McCloud