(Also known as Pneumatic Rock Drill / Air Sinker Drill / Jackhammer Drill)
Hammer drills and rock drills in this US-built range combine percussion with rotation to bore into rock, concrete, and masonry. The piston strikes the drill steel while the steel is indexed between blows, so cuttings clear and the hole runs straight. Air operation suits quarry faces, tunnels, and any site where an electrical supply is impractical or unsafe. ZIPP TOOL carries the ZRD series from the lightweight ZRD-9 hammer drill through to the ZRD-75, including the ZRD-20 lightweight rock drill for overhead and confined work. Applications include quarrying and mining, anchor and dowel holes, blasting preparation, and heavy civil construction.