Putting a four facet grind on drill bits for

Описание к видео Putting a four facet grind on drill bits for

I build a D-bit grinder from scratch for #roughcut2022 to regrind my collection of worn and broken drill bits with a four facet grind.
Links:

Emma:    / emmaritson  

Stefan Gotteswinters video on the four facet grind:    • Toolgrinding: Four facet grind  

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