Ed Huntress wrote:
"Stupendous Man" wrote in message
...

Can you ID these lathe tools? I found them in a large box of various lathe
cutting tools.

These are some of a dozen or so, ground from rod stock and honed. I have
no idea what they were made for. They are ground to the centerline and
have no relief angle.
http://i221.photobucket.com/albums/d...e/IMG_0877.jpg


That looks like a D-bit engraving cutter, made mostly for use in pantograph
mills. They were very common before CNC came along. I have a few of them
that came along with a box of miscellaneous tools. I've never found a use
for them.

There are many kinds of D-bit tools; this is just one type. I see that
Trevor suspects they're tapered D-bit reamers. It's possible, but
considering how common these tools once were (look up "D-bit grinder" on
Google), I think it's more likely they're cutters for a pantograph. They
looked the same as tapered reamers.

I considered that they may be pantograph bits, and discounted it on
the tip shape, as all the ones I have, have been lopped off at a
diagonal, in order to form a single cutting edge on the end.

I suppose they could be, though.

Any back-story onthe tools that they were together with? That may help
explain. Or not.


Cheers
Trev