Hammer Drills vs. Rotary Hammers (SDS)

What happens if you use a standard wood drill bit in cured concrete with a rotary hammer?

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 Correct IncorrectHigh-speed steel (HSS) wood bits lack brazed tungsten carbide tips; the extreme abrasion and heat will quickly anneal and ruin the cutting edges.

What happens if you use a standard wood drill bit in cured concrete with a rotary hammer?

• The cutting spurs instantly dull, anneal from frictional heat, and destroy the bit without drilling
• It drills faster because the flutes are sharper
• The concrete shatters into fine powder
• The drill motor turns backwards