Cutting circle from mullite kiln shelf
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Cutting circle from mullite kiln shelf
Hi,
I'm planning to cut a 12" circle from the center of an old 24" by 24" by 1.25" thick mullite kiln shelf. If anyone has experience doing this I would like to know. What cutting tools should be used? How to avoid splitting the shelf? I appreciate all input.
Thanks,
Warren
I'm planning to cut a 12" circle from the center of an old 24" by 24" by 1.25" thick mullite kiln shelf. If anyone has experience doing this I would like to know. What cutting tools should be used? How to avoid splitting the shelf? I appreciate all input.
Thanks,
Warren
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Re: Cutting circle from mullite kiln shelf
If you have the split blade for the Taurus that would probably work..otherwise its gonna be tricky
"No, you cant scare Me, I'm sticking to the UNION. I'm stickin to the UNION till the day I die" Woody Guthrie
Re: Cutting circle from mullite kiln shelf
Drill a starter hole then use a drywall saw or a sabre saw. Keep it wet.
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Re: Cutting circle from mullite kiln shelf
i would use a tile saw and cut a 12 or so sided shape. . r.nevermind. i was focusing on the donut , not the hole. that said, there is easier stuff to make a drop ring out of if that is what you are doing.
Last edited by rosanna gusler on Wed Feb 25, 2015 12:46 am, edited 1 time in total.
artist, owner of wanchese art studio, marine finisher
Re: Cutting circle from mullite kiln shelf
i would take a diamond blade in a 4" side angle grinder, and carefully lower the blade into the discarded piece near where the edges of the hole will be. make many cuts, and use the edge of it to round off and smooth (and probably bevel) the hole sides. make shallow cuts, deepening them with multiple passes.
this is essentially how they make on-site sink cutouts in granite countertops. if you have a water jet, or a diamond bit router, there's other ways to do this more easily.
i assume you're making a dropout shelf.
this is essentially how they make on-site sink cutouts in granite countertops. if you have a water jet, or a diamond bit router, there's other ways to do this more easily.
i assume you're making a dropout shelf.
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Re: Cutting circle from mullite kiln shelf
Waterjet will do it easily and perfectly.
Bert
Bert Weiss Art Glass*
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Bert Weiss Art Glass*
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Re: Cutting circle from mullite kiln shelf
Thanks to all for your replies. I think I will try a masonry drill bit for the starter hole and see if I can get a masonry blade for my sabre saw which I am will to sacrifice if necessary. I couldn't find a water jet shop in Richmond. The closest was in Norfolk or near DC. Yes, it is to be a large sturdy drop ring.
Warren
Warren
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Re: Cutting circle from mullite kiln shelf
I'd ask Tim Yardic; perhaps he'll share how he did it.
http://www.warmglass.com/phpBB/viewtopi ... =3&t=41942
http://www.warmglass.com/phpBB/viewtopi ... =3&t=41942
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Re: Cutting circle from mullite kiln shelf
Warren, I would start with a pivot hole in the center, and figure out some way to keep your blade stationary. The only way to get a clean circle is to spin the shelf around an axle.Warren Weiss wrote:Thanks to all for your replies. I think I will try a masonry drill bit for the starter hole and see if I can get a masonry blade for my sabre saw which I am will to sacrifice if necessary. I couldn't find a water jet shop in Richmond. The closest was in Norfolk or near DC. Yes, it is to be a large sturdy drop ring.
Warren
Bert
Bert Weiss Art Glass*
http://www.customartglass.com
Furniture Lighting Sculpture Tableware
Architectural Commissions
Bert Weiss Art Glass*
http://www.customartglass.com
Furniture Lighting Sculpture Tableware
Architectural Commissions
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Re: Cutting circle from mullite kiln shelf
Thanks all, it worked. Drilled pilot hole near edge of circle with masonry bit. At Bert's suggestion I placed the shelf on a lazy susan to feed shelf into sabre saw masonry (diamond) blade. Finished with file. Slow, but perfect.
Warren
Warren
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Re: Cutting circle from mullite kiln shelf
I've seen a shelf with a big hole cut out of it on a glass art supplies website.
However I don't recall the site. I will see if I can find the site.
Pete
However I don't recall the site. I will see if I can find the site.
Pete
Peter Angel
http://peterangelart.blogspot.com/
A bigger kiln, A bigger kiln, my kingdom for a bigger kiln.
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A bigger kiln, A bigger kiln, my kingdom for a bigger kiln.
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Re: Cutting circle from mullite kiln shelf
Peter Angel
http://peterangelart.blogspot.com/
A bigger kiln, A bigger kiln, my kingdom for a bigger kiln.
http://peterangelart.blogspot.com/
A bigger kiln, A bigger kiln, my kingdom for a bigger kiln.
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Re: Cutting circle from mullite kiln shelf
Cool!Warren Weiss wrote:Thanks all, it worked. Drilled pilot hole near edge of circle with masonry bit. At Bert's suggestion I placed the shelf on a lazy susan to feed shelf into sabre saw masonry (diamond) blade. Finished with file. Slow, but perfect.
Warren
Bert
Bert Weiss Art Glass*
http://www.customartglass.com
Furniture Lighting Sculpture Tableware
Architectural Commissions
Bert Weiss Art Glass*
http://www.customartglass.com
Furniture Lighting Sculpture Tableware
Architectural Commissions