Hard Turning with no Feed Marks

I have a 6 gallon crock I been putting this kind of s*it into for nearly 3 decades now.

Obviously it still leaks

BL:

You saw the video? It looked like a pretty slick idea to me. Have you ever tried it?

That's pretty interesting. FWIW, I have a book here from the 1930s that shows a tangential cutter (made of HSS) that has the same purpose. But this one is fed conventionally in the Z axis, rather than plunged.

BottleBob wrote in news:yNSdnZfEDO5rYZzWnZ2dnUVZ snipped-for-privacy@earthlink.com:

It's also called "Skiving" Bob. Been doing it for decades in cast iron grooving operations.

Humbug!

Anybody who's ever spent any time around automatics will recognize this as just a new twist on a VERY old technique call a shave tool. New materials and machines make it possible to do this with hard stock instead of just 12L; but a traditional shave could do profiles, gooves, spherical OD's, and then some.

And, properly used, it would let you hold sub-one-thousandth tolerances on machines that couldn't position within +/-.005.

Everything old is new again.

KG

You know, the jargon of machining has changed all around over the years, but a skiving tool used to be a form tool that worked with no top rake and, often, with no relief. It was just plunged into the work slightly below center, which gave you a negative effective rake and, effectively, it allowed a bit of front clearance below the cutting edge.

This tool looks more like a shaving cutter, although the geometry of just plunging it into the work looks a little weird to me. The shaving cutters I've seen generally travel along the length of the work.

Yep, Even on one my old Davenport's I could hold tolerances like that.