On Saturday, February 17, 2018 at 5:06:29 PM UTC-5, Ralph Mowery wrote in sci.electronics.repair:
In article ,
says...

On Friday, January 26, 2018 at 2:45:57 PM UTC-5, 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.

Can you just re-cut the end?
Maybe a step drill bit, or a conical bit.
(A dremel sounds a bit wimpy for the job, unless it's thin walled
SS.)

George H.

Did anyone mention a tapered reamer ? The pipe threading machines
usually
have them built in.

Do they work on rigid? pipe?