Re: [CAD_CAM_EDM_DRO] Slot drills

Slot drills are two flute cutters that can plunge (drill) as well as cut
sideways (slot). An end mill usually has more flutes and cannot plunge
because there are no cutting edges in the centre of the face (if that makes
any sense). To start a slot with an end mill you either need to start from
the edge of the job or drill a pilot hole first. With a slot drill you can
plunge straight in. On the down side they tend to wear out faster as they
only have two flutes.

At least this is what I was told...

Les

> I recently was given a book called "The CNC Workshop" which teaches
> CNC programing. I haven't had time to go throught the entire course
> but I have loaded the software from the included CD and played with
> the CNCez milling simulator. I created a test part in Vector, saved
> it as a DXF file and then used ACEconverter to generate the g-code. A
> little editing in Notepad to select the tools and speeds and then
> load that into the milling program to create virtual chips. Great fun.
>
> One thing that I noticed is that the default tool library for the
> mill program has both end mills and slot drills. I've heard
> references to slot drills over the years but never knew exactly what
> they were. Neither J&L or McMaster-Carr seem to carry them. Does
> anyone have a good explanation for what they are? I asked one of my
> professional machinist buddies and he'd never heard of them.
>
> Dan Eaton (Saint Louis)
>
>
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