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Posted by Manjo on December 22, 2006, 7:59 am
Andy Asberry wrote:
>
> >After reading about granite being a tough stone to drill, I need some
> >advice.
> >
> >I've dug a 36" deep hole and dropped in an 8" x 8" x 72" granite
> >mailbox post. I want to install two wrought iron brackets on one
> >smooth side to support the mailbox.
> >
> >Each brackets has four (4) holes on the vertical arm to be used to
> >screw the bracket to a willing material. I want to drill holes in the
> >granite post to hold each bracket. I plan on applied Gorilla Glue to
> >the back of the bracket to make sure the bracket stays attached to the
> >granite post.
> >
> >QUESTION: what type of power drill and drill bit must I use to drill
> >small 3/32" to 1/8" diameter holes (about 3/4" deep) in the granite
> >post?
> >
> >TIA for your tips, suggestions, comments,
> >
> >Manjo
>
> I would use a ceramic tile bit. I think if you use a hammer drill, you
> will have some left over granite... chunks.
>
> --Andy Asberry recommends NewsGuy--
Andy,
I'll give it a try tomorrow with my drill, but I have a feelilng the
granite is an order or two of magnitude harder than what a tile bit can
handle.
Best of the Season and Happy New Year,
Manjo
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