Yougfin Carbide Drill Bit Test in Hard Steel

Описание к видео Yougfin Carbide Drill Bit Test in Hard Steel

Drilling a small (0.140" dia) hole through a digital caliper, to make a DRO for one motion on my lathe, I ordered this set of drill bits. It said "carbide", but on the box it says HSS (high speed steel). Tried to finish a started hole in the steel, that is 1/8" thick, and it wouldn't do it. Bummer.

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