Re: [CAD_CAM_EDM_DRO] Fadal Drilling speed

On Sat, 02 Sep 2006 21:20:13 -0000, you wrote:

>I'm wondering how fast a Fadal 4020 can drill a series of 15/16 holes
>thru 3/8 mild steel, rectangular patttern, 2 rows of 4, 4" centers?
>
>I don't have any experience with these machines, but it takes me about
>30-60 seconds per hole manually.

Ignoring that specific machine, my feed/speed tables reckon 2 inches per
minute at 400 rpm, using a HSS .9375 inch drill in mild steel. Power
requirement for that is .35 HP.

A CNC machine should be able to drill all 8 holes in approx 2 1/2
minutes from start to finish.

Steve Blackmore
--