I need to cut a 1/8" by 1/8" +.020"/-0 slot through one side of a 3/4" x
3/4" x 1/4" square carbide insert. Do I need to send this out to an EDM
shop?

That's what I'd do...

"Tom Gardner" wrote in message
. com...
I need to cut a 1/8" by 1/8" +.020"/-0 slot through one side of a 3/4" x
3/4" x 1/4" square carbide insert. Do I need to send this out to an EDM
shop?

Just did this with a diamond wheel mounted in our gearhead drill press
(special arbor). Removed a .060" x .060" corner in C-2. Used .010" side
steps at full depth. Didn't take long. HTH
Doug

Can the shape be ground?

It could also be ground with a diamond cut-off wheel.

Check with a commercial / industrial tool & cutter grinder.

You can even do it yourself in a milling machine (or possibly lathe).

You turn up a copper disk and tap in diamond abrasive into the disk's
circumference.

Then use as grinding wheel to cut slot.

Wolfgang