Re: EDM speed

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "JohnW" <John.Walker@a...>
wrote:

> I need a 1/8" square hole about 1/2" deep in steel to hold a

cutting

> bit. The bit will be held in with a set screw so dimensions are

not

> overly critical. Would the simple "light bulb" EDM be capable of
> this and if so how many minutes or hours would it take? I can

drill

> a 1/8 through hole first and can probably find a way to circulate

the

> fluid through it.
>
> Or should I give up now and change the design to a round hole?
>
> Thanks
>
> John

Hi John,

the EDM would certanly work, and it would only take an hour or so to
cut it.

If alignment is not super critical and you have the 1/8 hole, I'd be
happy to square it out for you.

The more common way is to drill an oversized hole and broach the hole
square, but that requires a broaching tool.

Also, if the metal is not too tough, considder a hand file. a 1/8
square file will get you what you want about as fast as an EDM.

Dave