jackleg drill

Percussive tool that is powered by compressed air; it is used to bore holes into hard rock. The air leg makes the job easier for the drill operator.

oiler

Device that allows oil to enter the hammer to prevent wear of its moving parts.

air hose

Flexible hose through which oil is fed to the hammer.

drill rod

Usually hollow, steel rod that is activated by the hammer drill’s piston to strike the rock and bore into it.

bit

Cutting end of the drill rod that is used to bore into the rock.

water separator

Device that removes any trace of humidity from the compressor’s air to prevent damage to the hammer.

air leg

Movable cylindrical part that supports the hammer drill; it transmits air pressure to the drill from the compressor to which it is attached.

water hose

Flexible hose used to inject water under pressure to prevent wear on the drill rod and the bit and to discharge waste.

hammer drill

Percussive tool that is powered by compressed air; its piston (cylindrical part) is pushed by the air leg and hits the drill rod, causing it to bore into the rock.