On Friday, 26 January 2018 19:45:57 UTC, BenAnd wrote:
Repairing metal housing.

7/8" steel tube with ends slightly rounded inwards.
I need to remove all and a little more of the rounding inwards.

What material bit for either 1/4" OR 1/8" shank hand drill motor or
Dremel is best to use ?

I have many of these to do.

For steel, silicon carbide. Alox is much slower, and silicon dioxide best used on hard cheese rinds only. Diamond tends to be very variable. Tungsten carbide is good stuff.


NT