Re: [CAD_CAM_EDM_DRO] 718 steel

we've had some good results on tougher materials using
inserted carbide drills ,a good stub cobalt will work but they
dont last long even at slow speeds
use LOTS of cutting oil and a heavy feed to get under the
work hardened material ,its gona squeel but dont you cant baby it
if you only have a few to run you could try step drilling it out to size
before boring

Brian

On Saturday 21 April 2001 09:23, you wrote:
> has any body got experience working with 718 steel. this stuff is tough. I
> am almost done except I have to drill a .5 hole through the center, then
> bore it out to .51. unfortunately I am having a heck of a time drilling.
> rams are very slow, can anyone help