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50mm Drill Bit with open core



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2" Diamond core drill bit for fused glass and jewelry pendants.



One 50mm (2") diamond coated hole saw / drill bits. The size is 50mm outside diameter and 10mm shank, can drill up to 35mm depth. These are the very same diamond core drill bits Tanya uses when demonstrating how to drill holes in fused glass donuts. 50mm can be used as your outside hole. AAE Glass carries several different sizes. These are quality diamond bits and we have used these same bits for years. A free video is available in the Education-Video section of our website. These drill bits are to be used in conjunction with a drill press, rotary tool or hand drill. Suitable for the use in drill hole on glass, marble, tile or granite. Please add water when drilling. 1" = to 25.4mm.

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  1. Excellent value, awesome quality. review by Mark Scarletfirearts on 8/14/2018

    I bought this bit over a year ago. I taped a 3x5 card to my drill press and put a mark on the card every time I drilled a piece. Most of my work is between 1/4 in. and 3/8 in. thick. I wanted to see how much it cost per use to figure the cost in to my work. I figured I would get 75-100 cuts and the cost would be 40-50 cents per cut. The front of the card is now full and still cutting strong. I counted up the hash marks and got 184. That's far more than i would have ever guessed. I put the bit under the stereo microscope I use to inspect my dichroic resist prior to etching and it still has a whole lot of life left.

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