Re: Locating already drilled holes

OK,

I saw one last night in a catalog, so what's a drill bushing? and what's
it used for? Goes in the jig under where the hole is supposed to go?

Alan

Anne Ogborn wrote:

>
> Alison & Jim Gregg wrote:
> >
> > Hi Annie
> >
> > Yes been there done that, but put the hole in the fixture that held the
> > parts - fixture already held parallel in x axis by Tee slot key, and set
> > machine zero.
> >
> > A stupid operation where a small number of parts had to be made each
> > Tuesday, and the machine then cleared.
> >
> > Jim Gregg.
> >
>
> LOL -
>
> I have to confess I once used something far worse.
>
> I was briefly employed in a machine shop as an assistant.
>
> I was in the midst of making 1 in a limited series of 80 bizillion
> holes in plates for something. We'd made a jig to hold the part, but
> didn't have a drill bushing.
>
> We didn't have a depth stop on it either. I was just pulling down until
> the drill came out the bottom of the part. On part about 289, I spaced out,
> pulled the handle too far, and, yep, drilled a hole in the table.
>
> At about part 814 the owner came along and needed to use the
> mill. He cranked the table down towards one end, changed tools, cut a slot,
> and left the machie sitting. I came back and realized I had no idea where
> to move the table back to. Fortunately I had my little accident.
> I put my drill back in the spindle, cranked the table back over the hole,
> and tweaked the handwheels until the drill centered in the
> hole. Locked the slides and continued production.
>
> Hope George isn't on this list, or if he is, he forgives me for drilling that hole.
>
> Annie
>