On 2010-02-01, Ignoramus14657 wrote:
In the pile of tooling that came with the lathe,, there was this
mystery piece:

http://igor.chudov.com/tmp/Mystery-Tooling-01/

I am stumped as to what its purpose, but cannot help notice that it
fits on the bed and can clamp it. Last picture shows how it can do
it.

The "wheel" part is a threading cutter. It is resharpened by
grinding back along a radial line, loosening the big nut, and rotating it
to restore the radial line to center with the spindle axis prior to
re-tightening the big nut.

I'm not sure what kind of toolpost it mounts on, but certainly
not on the edge of the bed as you have it shown.

I'm not sure what the other bright metal piece is for -- but at
a guess, it is an extra cutting edge to bevel the end of the workpiece
so you can do two parts of the task with a single tool

It would be interesting to see what it was actually supposed to
mount on. Obviously, not the piston style quick-change toolpost which
the machine currently has mounted.

It might be for mounting on a turret tool -- but that would
require a power feed for the turret, not the bolt-on bed turret that my
Clausing has. For my turret, the proper tool for threading is a
Geometric die head -- or one of the similar ones from other makers.

Enjoy,
DoN.

--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---