Q. What hammer machine is best for concrete?

Answer

The best hammer machine for concrete is the rotary hammer. When in use the drill causes a modest inward and outward vibration and push while working. Typically a rotary hammer drill with a carbide-tipped bit is used to bore holes in concrete up to 25 mm in diameter. More substantial holes must be drilled with a rotary drill fitted with a diamond core bit cooled in water. It's true that a jackhammer may create a serviceable hole if the desired aesthetic result is not paramount. In order to drill into concrete a masonry bit must be used. In addition masonry bits are not like wood bits therefore will need a hammer drill.