|
Posted by on September 26, 2007, 12:44 am
> >
> >
> > > I'm using a Hilti drill to drill holes into concrete ceilings.
> > > Drilling overhead with a heavy drill and big bit is making it
> > > difficult to keep the hole straight. The Hilti is more than up to the
> > > job ... the problem is when you're applying upward force, the natural
> > > tendency is to pull the drill toward you or away from you, which makes
> > > for a slanted or "crooked" hole. Any tips on how to keep the drill
> > > straight so as to achieve the straightest possible hole?
> >
> > Kinda depends. On how straight it HAS to be, and how much time you have
to
> > drill X many holes in a day, how many of these holes are you going to
drill
> > and how frequently, and how much equipment you have on hand.
> >
> > If I (underlined I) had to drill some holes for my own use, I'd get a
piece
> > of 4 x 4 and drill a hole in that. Then I'd drill a starter hole in the
> > concrete, slide the 4 x 4 on the bit, put the 4 x 4 flat on the ceiling,
and
> > drill a reasonably straight hole.
> >
> > If it had to be EXACT, I'd put the 4 x 4 on a couple of screw jacks.
> >
> > If I HAD to drill a bunch of holes every day, I'd make a drill holder
(I'm a
> > welder), and could do that cheaply. One could easily be mounted to the
top
> > of a screw jack and moved in a couple of minutes.
> >
> > If I were a craftsman and had to do this a lot all the time, I'd have a
> > welder make me a drill guide, and do consistent accurate work.
> >
> > It really all depends on how accurate you have to be, and how often you
have
> > to drill the holes.
> >
> > The 4 x 4 idea would be the hobbyist approach, easy, cheap, and
reasonably
> > accurate for a few holes. Plus, you could keep it on a shelf for future
> > use.
> >
> > From there, if it has to be accurate, and it's going to make you money,
DO
> > IT RIGHT THE FIRST TIME.
> >
> > Steve
>
> Good ideas all, and maybe I'm just dense (well, I'm obviously not well
> educated about this type of thing at least), but I'm not seeing how a
> screw jack would help me hold the drill guide up against the ceiling.
> Would there be another way to hold the 4x4 against the ceiling? I'm up
> on a six foot scaffolding set with very little room to work ... I love
> the 4x4 idea and think it would work for us .... but I'm stumped by
> how to hold it in place.
Transmission stand, pipe stand, etc...
Something with a screw adjustment on the top for quick installation/removal.
Any type of stand that would be adjustable for height that would wedge it up
on the ceiling.
Or, have a welder make you a jig that could have a spring action that would
compress as you're drilling.
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap