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Drill Sharpening Gauge
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- Printables
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- Tools
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- Creative Commons — Attribution — Noncommercial
A drill sharpening gauge to ensure correct cutting edge angle and that edge lengths are equal. Equal edge length is vitally important for drilling true and to true size.
The gauge is designed to accept a 150mm (6") steel rule. My rule measures 19.04mm (0.750") and clips firmly into the slot to enable tip length check.
Yes, you can buy these things fairly cheaply but I didn't have one when I needed it.
An included angle of 118degrees is for mild steel and general jobbing. 130degrees is for stainless and harder steels.