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  #1  
Old 09-06-2011, 05:55 PM
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Julianna Julianna is offline
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Blue Alabaster destroying my drill bits

Hi, everyone!

It's been a busy (and hot!) summer, and I've been neglectful of both my sculpting and the community

I've started getting into a piece of blue alabaster, and it's destroyed my masonry, carbide and titanium drill bits. What I'm trying to do is hollow out (of course!) a section of the sculpture. I've successfully drilled through the softer parts of the stone, but it seems that there's a section that is the blue part of the alabaster which is resisting everything I have.

From the power end, I've been using a regular hand drill (not pneumatic) and a Weecheer.

Any ideas of what tools/techniques I should use to get at the tough parts?

Photos:
http://juliannayy.posterous.com/2011-09-06-id-46

Thanks!
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  #2  
Old 09-06-2011, 08:47 PM
cooljamesx1 cooljamesx1 is offline
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Re: Blue Alabaster destroying my drill bits

one thing i can say is that glass drill bits eat right through glass, which destroys every other kind of bit... ?
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  #3  
Old 09-07-2011, 08:34 AM
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mantrid mantrid is offline
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Re: Blue Alabaster destroying my drill bits

maybe a small diamond tipped core drill bit
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  #4  
Old 09-07-2011, 02:23 PM
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The Forge The Forge is offline
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Re: Blue Alabaster destroying my drill bits

Try a hammer/drill and keep the carbide drills sharp.
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  #5  
Old 09-07-2011, 06:36 PM
EJB EJB is offline
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Re: Blue Alabaster destroying my drill bits

Diamond.
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  #6  
Old 09-11-2011, 09:23 AM
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Julianna Julianna is offline
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Re: Blue Alabaster destroying my drill bits

Yeah, it seems diamond bits are the way to go. I think the closest place to me that carries them is the Compleat Sculptor in NY. Anyone know if I can get them closer to Toronto?
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  #7  
Old 09-11-2011, 10:50 AM
grommet grommet is offline
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Re: Blue Alabaster destroying my drill bits

http://www.ctidirectory.com/search/p...od_code=665400
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Old 09-11-2011, 07:53 PM
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evaldart evaldart is offline
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Re: Blue Alabaster destroying my drill bits

Diamond coring tubes indeed. Very fast material removal (no hammer action, of course). Variable speed (the larger the diameter the slower the drilling). Wet or dry. I buy them from http://www.acutabove.com/
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  #9  
Old 10-04-2011, 03:43 AM
chipfryer chipfryer is offline
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Re: Blue Alabaster destroying my drill bits

Hi Julianna,
It looks as though you are doing the write thing, however looking at your drill bit. I think you need to sharpen it correctly. I cannot truly explain how it would look to you on here.

*** The drill bit needs clearance for dust to escape. If this does not happen, the bit just grinds on dust, heats up and often gets destroyed. Also it needs two cutting edges just like

I'll try and draw a mockup if I get time to show you how I deal with this. At present I'm drilling some really tough slate with iron deposits. I can tell you for sure, this was the first time drilling slate, that I have ever been worried about things snapping off.

So I guess we are in the same boat lol!

You could try applying lashings of water to help dust removal in the meantime perhaps? I suppose you've already tried this no?




Quote:
Originally Posted by Julianna View Post
Hi, everyone!

It's been a busy (and hot!) summer, and I've been neglectful of both my sculpting and the community

I've started getting into a piece of blue alabaster, and it's destroyed my masonry, carbide and titanium drill bits. What I'm trying to do is hollow out (of course!) a section of the sculpture. I've successfully drilled through the softer parts of the stone, but it seems that there's a section that is the blue part of the alabaster which is resisting everything I have.

From the power end, I've been using a regular hand drill (not pneumatic) and a Weecheer.

Any ideas of what tools/techniques I should use to get at the tough parts?

Photos:
http://juliannayy.posterous.com/2011-09-06-id-46

Thanks!
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