Drill Bits: Sharpen or Replace?

Logosofia no Dia a Dia · Sep 14, 2026 · 22m

Most people blame the drill when a hole won't go through concrete or steel. But the bit is the only part of the system that actually touches the work — and a dull one needs three to four times more force, turns that force into heat, and can even harden the material it's failing to cut. This episode works through the real economics of drill bits: why a carbide bit that costs sixty times more per bit can be sixty times cheaper per hole, why the fancy gold coating ruins aluminium, and why sub-ten-millimeter bits are consumables while a fifteen-millimeter cobalt bit is worth maintaining. Then it…