You did not define what you are trying to attach, if
the stress level, torque or shear is moderate then I
recommend that you consider one of the two part
epoxy's that are available at OSH or Home Depot. I
have used them in the past and have not had any
problems however I am not trying to support 300# on a
single point either. If you are set on using screws
for attachment then use a hammer drill if at all
possible. With either a rotary drill or a hammer
drill use the "best" carbide drills you can locate and
work slowly don't try to force the drilling process.
Also the bits can be sharpened so don't discard them
out of hand.
mp
--- Dave Cole <[EMAIL PROTECTED]> wrote:
> Gang:
>
> Somewhere along the line in my basic set of handyman
> techniques, I
> never got the memo on how to fasten things to cement
> or masonry.
>
> I have a couple of projects pending, both of which
> need to somehow
> attach things either to a cement wall or to a cement
> patio.
>
> A couple of weekends back I had a similar project
> and went out and
> bought a masonry drill bit, which I put into my
> trusty 3/8-inch
> electric hand drill, and a handful of self-tapping
> masonry screws.
> The first couple of holes went fine and the screws
> seemed to work OK,
> but by the third hole the bit was obviously becoming
> dull and by the
> fifth hole, that bit was done.
>
> I'm assuming that the rest of the world doesn't need
> a new bit every
> fifth hole, so obviously I'm doing something wrong.
>
> Advice?
>
> \dmc
>
> --
>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Dave Cole
> Gen'l Sup't: Grand Teton & Everglades Steam
> Excursion Co.
> Pacifica, Calif. USA
> <http://45mm.com/> <mailto:[EMAIL PROTECTED]>
> List Mom: sslivesteam, the list of small-scale
> live steamers
> <mailto:[EMAIL PROTECTED]>
> Editor: TRELLIS & TRESTLE, the newsletter of
> the
> Bay Area Garden Railway Society
> <http://www.bagrs.org/>
> <mailto:[EMAIL PROTECTED]>
> Webconductor: Pacific Coast Live Steamers
> <http://p-c-l-s.com/>
> <mailto:[EMAIL PROTECTED]>
>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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