The Hard Rock System is a pneumatic percussion tool similar to a standard jackhammer except that it operates at a higher frequency of percussions per minutes (as much as 2,200 bpm).
- Fits on nearly any horizontal directional drill
- System consists of the hammer, a slant-faced bit, support station oilier and related hoses and components
- Available with 4-, 5- and 6-in. pneumatic hammers and a pneumatic pull reamer capable of 8-, 10- and 12-in. diameters
- Delivers a volume of 650 to 700 cfm via a true high-pressure system
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