Re: [CAD_CAM_EDM_DRO] Dumb question on the drilling of holes

Drill bits are well know for making off size and irregular holes. That is
why you should use a reamer if the fit is important.

Of course this is easier with CNC when you can get back to the same spot so
you don't have to keep switching tools.

Tim
[Denver CO]

----- Original Message -----


> Guys,
> I'm following this subject with great interest. One of the reasons
I
> subscribe to this group, is to learn enough to convert my mill to CNC. I
> have been fabricating some parts on a mill, using the DRO, and have run
into
> problems drilling holes. Using certain drill bits, many of the holes have
> come out oversize, and some completely out-of-round. Changing bits has
> helped, especially if I use a shorter length bit, but I'm going to
> investigate using the 135 degree, or other similar drills. I'm looking
> forward to a CNC conversion, when I intend to center drill the holes
before
> using the correct drill bit.
>
> Marv Frankel
> Los Angeles