June 2014. From Construction Europe magazine.
Rockmore International, a manufacturer of rock drilling tools for DTH (down the hole) and top-hammer drill rigs, has introduced the ROK 250 – a new 50.8mm class DTH hammer.
The new addition is described as a breakthrough for DTH drilling technology, as the ROK 250 model is considered to be the first DTH hammer in its class to have been developed to operate under high air pressure levels up to 24 bar and beyond.