Tom Miller wrote:

"Tom" wrote in message
...
Jerry Foster wrote:

"gtslabs" wrote in message
oups.com...
I am making an attachment to my knee mill height hand crank. I drilled
a hole in a rod to match the diameter of the crank shaft. However
there
is a keyway that I need to mill out of my adaptor on the INSIDE
Diameter. I dont see a Woodruff cutter working in this 5/8" hole.
I can mill it but it will not have square corners. What is needed to
get the square slot?
Thanks
Steve

..................
But, for a "one shot" deal, you can use the mill as a shaper. Run an
end
mill down through it to get it to the right width and depth. Then take
a
boring bar or grind a piece of drill rod to make an appropriate cutter
and
chuck it in the mill. Put the mill into back gear, if it has one.
Rotate
the mill to position the cutter (easy if you can get at the belts...)
and
then use the quill feed to drive the cutter down through the work,
cutting
out the corners. Use the table feed to move the work for successive
cuts.

You can do the same thing with the lathe, holding the work in the chuck
and
driving the boring bar with the carriage feed.

Jerry

I don't think so, Jerry!

I think so Tom! I've done it quite a few times. If you don't have a key
broaching machine our Minuteman broaches, this is about the only
alternative. Its slow and hard work, but if you have half a plant,and fifty
employees waiting for a pump that requires keyway, then you just do it.

Tom Miller

Quite the oz hero, Tom, pity about your English comprehension.