I need to bore 1 foot deep holes in concrete about 1″ to 1 1/4″ sized. This is to accept a hardened steel rod which will then be “glued” to the inside of the hole. Because these rods need to be perfectly plumb I need suggestions any would have on how you drill a perfectly plumb hole.
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Jury a drill press.
or use its concepts- Id think if it like a dowel holer and create a guide rod. Have a tube just wider than your bit from the surface of the concrete up. The longer the tube the more plumb your hole.
Throw a few bubbles on the tube or your magnetic level. Rig up some adjustable clamps or brackets to hold the rod in place.
-zen
Oh at the concrete surface you should probably have a gap or a tube sleeve with holes cut in the sides to allow for the waste to exit.
you could cut into the guide rod itself as well.
Like a compensator or mussel break on a firearm.
-zen
Edited 5/4/2005 6:38 pm ET by zendo
Long bit, and a traffic cone.
edit: never mind, you used the "perfect" word.
That is next to impossible.
Spheramid Enterprises Architectural Woodworks
Adomition, beckons predition to the eyes of the soul...or What?
Why look here?
Edited 5/4/2005 6:58 pm ET by SPHERE
A dumb question... but if they're close, couldn't they be straightened with a small sledge after the epoxy sets??
It works with suretites which is a giant lag for holding newels. I beat 'em plumb after they're
set...into wood but the idea's the same...
silver
My cheapo 3/8" drill had a bubble level on the end. Maybe you can plumb the drill in a vise, then stick on one of those stick-on bubble levels. I don't know how accurate it is.
I thought about taping some levels to it. Seemed gaudy and makes one think "there's got to be a better way," thus why I'm asking, otherwise I'll be taping levels on tomorrow morning.
I guess I could "beat 'em plumb" if they're off a little, but bear in mind these are 1" hardened steel rods, not sure much they'll move with a little friendly persuasion from the business end of my hammer.
How about drilling a slightly oversize hole close to plumb...you could make 2 90 degree wood squares that act as guides parallel to the bit and drill close to plumb and then shim deadnuts when they're set in the epoxy...
silver
rock drill like used in a quarry.
Dane
I will always be a beginner as I am always learning.
Rent a core drill.
Drop some big buck at the rental store and get one of the super duper drill things.
http://www.us.hilti.com/holus/modules/prcat/prca_navigation.jsp?OID=-15178
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Don't confuse him, RASCONCThat there thing is for drilling horizontal holes in a wall. He is needin' to drill into the floor! You gots to find a vertical picture of it. :)
Ha hah ha, yeah, can ya just flip the picture, please?
Is the concrete itself really one foot thick?
"Preach the Gospel at all times; if necessary, use words." - St. Francis of Assisi
I agree with Rascong. I watched a crew from AL beef up a chain link fence. That involved adding additional vertical posts for support. Like 6" diameter poles. They used a similar rig to bore through the concrete and the poles were plumb after the holes were drilled. I would think a larger rental center would have one. Watch the bit rental- that's where they get ya.
No,concrete is morelike 4" thick