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Star drill taking half an hour to cut through whatever is behind the tile

Star drill taking half an hour to cut through whatever is behind the tile

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  #1  
Old 12-20-12, 07:35 AM
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Question Star drill taking half an hour to cut through whatever is behind the tile

In a bathroom with thick tile in a home circa 1966, it is taking half an hour for a star drill to cut through whatever is behind some very think tile.

It looks like iron dust coming out. We are drilling at the edge of the shower wall so not near any plumbing.

What could be behind the tile? How do we finish drilling?
 
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Old 12-20-12, 07:41 AM
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Is there a bathroom above this one on an upper floor? Just a thought as I'm certainly not a plumber.
 
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Old 12-20-12, 07:44 AM
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Question No this is one story

This a single story. There is a bathroom in the basement below it. Why?
 
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Old 12-20-12, 07:46 AM
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Steel plates protect various items that can be within the framing. Water, electrical, sewer, etc. It's hard to say what you're drilling into without seeing it... even then it's anybody's guess. Maybe you are right on a nail head.

At any rate, if you're through the tile then you're done with the tile bit. Switch to a high speed steel bit and finish drilling your hole, but be aware that if that's a protective plate, you might damage something in the process.

Starting with a small bit might help (1/8" bit might allow you to make a pilot hole that will make drilling with the next size drill bit easier.)
 
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Old 12-20-12, 07:47 AM
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You are using a star drill (chisel) and hammer? You could be hitting some wire mesh embedded in the mortar or maybe you got lucky and hit a nail or screw head.
 
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Old 12-20-12, 08:01 AM
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Question It's right out at the edge of the dividing wall between the toilet and shower

We are drilling right out at the edge of the dividing wall between the shower and toilet. It could be mesh as we are hitting the same issue with every single hole. I hope there is not a place protecting electrical etc within three inches of the edge of the outer edge of the dividing wall? Is that possible? There are no light switches near or on that wall and the plumbing (shower head above and faucets below) goes straight up and down several inches away.
 
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Old 12-20-12, 08:10 AM
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Question It's a star drill drill bit and heavy duty B&D drill

We are using a star drill drill bit and B&D electric drill. Four of six holes for putting up a handicap bar are drilled through. We can't see in the holes well enough to tell what is behind the tile. The tile itself is about half an inch thick or more.
 
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Old 12-20-12, 08:19 AM
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If you're that close to the edge (1" ?), you could be hitting corner bead.
 
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Old 12-20-12, 08:37 AM
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I agree that if you are finding this with every hole that it's probably just mesh that you're hitting... that was popular back then behind tile. Once you have made the hole in the tile, just switch to a normal drill bit for wood/metal and it will go right through it.
 
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Old 12-20-12, 09:07 AM
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Hopefully you have something with substance to hold your rail. Sheetrock/cbu/tile may not be a substantial enough substrate to provide good holding. You may be going through a lath and cement wall, as others have said, was the "thing" back in the 50's and 60's.

Are you sure you are using a "star" drill in a rotating drill? Or are you using a concrete/glass bit? Star drills are normally chisels you hit with a hammer.
 

Last edited by chandler; 12-20-12 at 09:29 AM.
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Old 12-20-12, 10:04 AM
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You don't use a star drill with an electric drill. You use it with a hammer.


If you are using a concrete drill bit you don't use a regular electric drill. You use it with a rotary impact drill.
 
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Old 12-20-12, 10:26 AM
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And if you are not rich, you use what you have with what you got and live with it. It is a drill bit called a star drill and we are using it with an electric drill. And the job is done now.
 
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Old 12-20-12, 02:46 PM
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Nobody said anything about being rich. We were questioning the use of a tool that isn't made for use in a drill. Now, you may have a concrete bit that is made by a manufacturer called Star, but the image Ray posted is a star drill and the obligatory driving means.

Thesaurus

[TABLE]
[TR]
[TD]Noun[/TD]
[TD]1.[/TD]
[TD]star drill - a steel rock drill with a star-shaped point that is used for making holes in stones or masonry; it is operated by hitting the end with a hammer while rotating it between blowsbore bit, borer, rock drill, stone drill - a drill for penetrating rock
[/TD]
[/TR]
[/TABLE]
Based on WordNet 3.0, Farlex clipart collection. 2003-2012 Princeton University, Farlex Inc.
 
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