Depending on what the arbor looks like and assuming you have one arbor
and mulitple saws that fit it plus a bunch of other things that might mess
with this idea ...
Put the 1 inch hole saw on the arbor and then try to put the 3/4 inch hole
saw inside the 1 inch say and also on the arbor. This way the 3/4 in saw is
the pilot for the 1 in hole saw.
> Hey guys,
>
> Well the subject line sort of tells it all. I was following instructions
> for
> installing a fire department emergency open switch for our electric
> driveway
> gate (I got cited and was given until next week to install it). The
> instructions said drill/bore 3/4" hole for mounting the switch, which I
> did in
> a 6" by 6", 1/4" thick steel square gate post.
>
> Well it is big enough for the switch, but not the nut that holds it in
> (they
> were assuming access to the back of he plate, but this is a blind
> location). I
> have a face plate that will hold it to the post.
>
> Anyway, I have a 3/4" hole where it really needs to be about 1" (it is has
> a
> very thick 7/8" across the flats nut).
>
> I need a different way to attach the 3/4" cylinder switch to the stainless
> steel face plate or a way to open up the hole about 1/4".
>
> I could look for a very thin nut, but that will take some time. I probably
> could epoxy the switch to the plate and forgo the nut (this may be my
> best/easiest solution). I don't think I can hole saw it again as I would
> not
> have a pilot. I can try grinding it out, but that will take some time with
> that thick steel. I can get a blade for the Roto Zip, or the jig saw or
> the
> Sawzall. I could take the air hammer to it. Of course I can go out there
> with
> the torch and cut it open, but then I would have to repaint the post, and
> probably the gate and the other post so it would match.
>
> I am just thinking somebody here has a clever solution for increasing the
> diameter of an undersized hole in a thick piece of steel in a very visible
> location. Thanks in advance...
>
> best,
>
> doug
>
> '72 BSA B50SS
> '74 Triumph TR6
> '01 Harley XLH883
> '03 GMC Cargo Van
> _______________________________________________
> arvidj@visi.com
>
> Shop-talk mailing list
>
> http://autox.team.net/mailman/listinfo/shop-talk
_______________________________________________
Shop-talk mailing list
http://autox.team.net/mailman/listinfo/shop-talk
|