Re: CNC drilling

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Ron Ginger <ronginger@...>
wrote:

> Hi, Here's Drill Program that calculates the Rpm for the Drill size

and the Drill point depth. Also Linear and Bolt Circles to gcode.
Take a look at there link: http://www.cad2gcode.com/
Cheers
Bob A

> I just finished a new Jet mill conversion. In the past I have always
> been afraid to drill under CNC control- Ive let the program single

step

> to location, then I operate the quill by hand.
>
> What feed rates are used for CNC drilling? Do you calculate chip load
> like you would for an end-mill? What is a reasonable chip load for a
> drill? I suppose that varies by drill diameter?
>
> ron ginger
>