The Davenport's wrote:

So, many years ago, I worked at a shop that, among other things, had an
internal keyway cutter that was used on a vertical mill. Used a shaft that
was the same size as the bore of the part and had a small cutter mounted at
the end...the machine spindle provide the power and thru some bit of magic,
the cutter at the other end turned, cutting the internal keyway.

My problem now is trying to remember the name of this handy little thing as
I may have a job coming up that would REALLY be able to use it, asopposed to
single pointing a .332 wide keyway 6.3" in a 1.024"dia bore.

Thanks gang,

Mike


Key Seating Miller. National Tool used to make them.

For all those of a doubtful disposition:

http://www.metalworking.com/dropbox/keymilling.jpg

Tom