Re: Locating already drilled holes

Did anyone suggest finding the center of the hole with a dial
indicator in the spindle....or did i miss something.



--- In CAD_CAM_EDM_DRO@egroups.com, "Terry Ackland" <hexagon@o...>
wrote:

> --- Ian,
> bits of razor blades and old WD optics? Tell me you still ride your
> bike to mill with your egg sandwiches in a gasmask bag. I can

rember

> the days when us Brits did not have the proverbial pot but things
> have
> changed - at least down south.
> Terry Ackland
> In CAD_CAM_EDM_DRO@egroups.com, "Ian Wright" <Ian@i...> wrote:
> > HI,
> >
> > My method would be to turn a small length of bar stack to the

hole

> diameter
> > and, at the same setting, turn the end to an accurate point (you
> can
> leave a
> > shoulder between hole diameter and point if you wish to stop it
> falling
> > through) then set up to this point. If I want real accuracy here

I

> set
> > another true point in place of the tool and just nip an old razor
> blade
> > between the two points - you can soon see if they line up, even a
> thou
> > either way will make the blade tip at an alarming angle! This is
> also the
> > best way of setting a lathe tailstock in line with the headstock.
> >
> > Ian
> > --
> > Ian W. Wright
> > Sheffield UK
> > ----- Original Message -----
> > From: <ballendo@y...>
> > To: <CAD_CAM_EDM_DRO@egroups.com>
> >
> >
> > > Someone asked how to find the center of an already existing

hole?

> > >
> > > If the hole is small enough, you can use the pointy end of an
> > > edge/center finder in the way described in my earlier post(with
> punch
> > > marks).