Stainless steel tile nails hit the iron hit not into how to do

Tool selection selection of tungsten carbide drills, when available, super-hard high-speed steel or ultra-fine grain tungsten carbide drills. If the hole is shallow, you can choose indexable carbide shallow hole drilling, the drill flower chip effect is good, conducive to chip removal. If the drill pattern is sharpened manually, the drill is required to grind the chip-sharing groove, trim the transverse edge to reduce the axial force, and trim to double top angle to improve the heat dissipation conditions. The back angle should not be too large to avoid the phenomenon of stabbing.