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Diamond core drill bits for drilling glass

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  • Diamond core drill bits for drilling glass

    Does anybody use the diamond coated hole (core) drill bits, and if so, could I ask which make you would recommend?

    I've been using these (10mm) for the last year with my pillar drill and found them really goos to use, but suddenly I'm not able to drill holes without breaking the glass anymore. I'd been using the ones from B and Q, but started having problmes with these, so then I tried some from a seller on Ebay, but I'm still having the same problem. I'm asuming it must be the bits, as I'm not soing anything else differently, and used to have no problems, so I'd be really grateful if someone could recommend a good quality, reliable brand (but not too expensive!).
    Thanks very much!
    my website: www.thelittleglasskiln.co.uk
    twitter: www.twitter.com/littleglasskiln
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