Drill Bit For Glazed Over Holes?
Posted 08 May 2014 - 12:19 PM
So some small holes I need to fit head pins through (20 gauge wire with a wider flat head at the end) got glazed over and filled in.
Is there a drill bit that I can use on glazed porcelain to open it back up? Will I risk breaking it? Don't want to remake it!
Posted 08 May 2014 - 01:02 PM
Dremel with a diamond burr (bit). To have the burr last longer dribble some water onto the clogged hole so the burr stays wet. The dremel will want to jump around on the glazed surface, I've had better luck with a fast speed.
Posted 08 May 2014 - 01:03 PM
Whenever you touch ceramics with a drill bit you risk breaking it. Is it useful without a hole? If yes, and you can't bear to live without the piece, then leave it be. If the piece is only useful if it has a hole in it, then go for it with the smallest drill bit you can find. Once you have a starter hole you can use a larger bit to increase the hole size. If you are really scared to loose the piece and need to ensure its best chance of survival, take it to a jeweler and have them drill it out with a diamond bit. good luck!
Posted 08 May 2014 - 01:47 PM
I would use the dremel with a diamond bit. A little 3 in 1 oil will help some, keep the bit from getting so hot that it melts the adhesive holding on the diamond dust.
In the future you should probably bevel the inside and outside of the holes in the leather hard stage, and when glazing make certain to clean out the holes. The beveling seems to keep too much glaze from gathering in the hole.
Simply retired teacher, not dead, living the dream. on and on and. . . . on. . . . http://picworkspottery.blogspot.com/
Posted 08 May 2014 - 05:44 PM
Posted 16 May 2014 - 12:34 PM
I have been using the diamond tipped bits for years now, but did not know about the oil or the beveled hole.
Of course I used the tips for marking tools, making medallions in bone-dry clay tablets, but I also had good results
etching the exterior of black, navy blue, and other dark colored glazes. I also etched some drinking glasses when I found out
how toxic it would be to etch glass with acid.... and they turned out pretty good. I drew the pattern first with a Sharpie, went over
it with the dremel, and then washed off any markings with a soapy Scotch Brite pad. Harbor Freight had something, much smaller
than a Dremel called an engraving tool that does the same thing. They have discontinued the best tool...it was more like a dremel pencil
engraver..10 years ago they were about $6.50 each...cheap enough to be disposable. The new model is larger and about $8.00 I think.
Posted 17 May 2014 - 04:52 AM
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