Triangular Drill Bit Glass & Tile Drill Bit For Ceramics

[jimon]

Hello everyone.

I have few dull drill bits for porcelain stoneware and tiles. The drill bits have a triangular shape. An example is shown in the image.

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Does anyone have experience sharpening such drill bits on a Tormek?
I think it will needs, for this type of metal, diamond wheels.
But how exactly? Which jig or device should be used? DBS-22? MB 100/102? SVD-110? Or something else?
I would be grateful for a reply from anyone who has this kind of experience.

[tgbto]

I have no experience with these, and my go-to website (Rich's Sharpening Handbook) doesn't either.

No Tormek jig will help you in this case. If I *really* wanted to sharpen these on a Tormek, I'd use a MB-100/MB-102 and a drill collar  to sharpen the rounded sides of the point on the side of a diamond wheel. Or you could do it freehand. Then sharpen the flat faces of the point on the sides/shoulders of the diamond wheel.

But a belt sander or a simple diamond plate will be much better suited. One word of caution : you should try to limit sharpening the sides to the bare minimum (ie stay close to the point) to avoid changing the diameter of the bit.