Modifying standard insert lathe tooling, pics enclosed

I didn't concieve this idea myself, just made a few copies
for my automatic. I need to put a chamfer on most parts, so
figure this can be quickly adjusted to hop in there and add
the chamfer as it's facing. It's really not specialized tooling
for just one specific part.

Granted it probably isn't used as much anymore what with N.C.,
but thought I'd post for some comments, and maybe some other
examples.





For reference, the square carbide is 1/2" sq. the shank 3/4" sq. and the little triangle
tool is a 1/4" shank.

The groove in the big tool is for carbide clearance, as some of the other 1/4" tools
hang over to that side (the 45 degree one)

Excellent set up--thanks for sharing.

can you explain please? i dont get it. does the triangle insert portrude more than the quare insert? thanks.

dian said:

can you explain please? i dont get it. does the triangle insert portrude more than the quare insert? thanks.

Click to expand...

Dian,
This is where a picture would help, but won't have any until
Monday, so I'll try to describe.

The machine is a W&S automatic bar machine, and has the collet (spindle)
on the left side, this tool mounts on a cross slide that face's the part, generally
I set it to do this operation first, to clear the workpiece of the tit leftover
from parting off the last part (there is separate cross slide just for the part
off tool BTW).

So when this cross slide advances, and the square insert face's off the bar,
it can go a little past center with no harm, by sliding the little insert holder
up, I can have it put a little chanfer on the part, all in one cross slide stroke.

There are multiple tool, toolblocks avail for my machine, but they can
get to be quite large and clunky, hence this small tool "sneaks" in there
to put the chamfer on.

It's really not a special tool, I really can't devote anything to special tooling
as the part run's average around 25 pieces, but this addition is sort of
universal, as most every part needs at least a small chamfer to remove a burr.

I would have like to make this toolholder with a little screw (probably #8-32)
to positively advance the little tool, but ran with what I had, material wise.

The clamp is made from an old inserted toolholder that the pocket got
destroyed. The slot is .250 wide, and .240 deep, so to clamp the .250 sq.
shank.