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First recorded activity by BoatBanter: Jan 2007
Posts: 983
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Ping: Gene
"Gene Kearns" wrote in message
...
On Tue, 08 May 2007 18:47:02 -0400, Gene Kearns penned the following
well considered thoughts to the readers of rec.boats:
On Tue, 8 May 2007 18:05:43 -0400, JimH penned the following well
considered thoughts to the readers of rec.boats:
I need to drill some new bolt holes in 1" and 3/4" diameter SS tubing to
add
a step to my swim platform ladder.
Will I need a special drill bit for this or will my ordinary metal
cutting
drill bit work?
Thanks!
My personal choice would be to drill a pilot hole through both sides
of the tubing (from one side) about 1/16 of an inch or so in diameter.
I would, then, use a unibit to size the holes.
http://www.crawfordtool.com/unibit.html
The pilot hole will insure that the holes enlarged by the unibit line
up. The unibit has a straight flute and will not grab in the tubing.
Depending on the size of the screws, you probably can get away with
just drilling through with a conventional bit, but bear in mind, when
the tip breaks through it is going to try to screw it's way through
the tubing and grab.
Unibits can be bought pretty cheap at places like Northern Tool or
Harbor Freight.
Stainless steel = slow speed and positive feed, don't let the drill
rub without cutting.
Jim,
Email me a good email address......
--
Grady-White Gulfstream, out of Oak Island, NC.
Homepage
http://pamandgene.idleplay.net/
Rec.boats at Lee Yeaton's Bayguide
http://www.thebayguide.com/rec.boats
Done
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