PRESS RELEASE: The Rockmore T series DTH hammers are ‘tubeless’ and utilise drill bits with industry standard shank connections without the imbedded plastic blow tube/foot valve. 

The first DTH model in its T Series was the ROK 600T, a six-inch (152mm) class model that uses a tubeless QL6/QL60 bit shank. Last year, Rockmore also released its ROK 60T-360T hammers that utilise the IR 360 bit shank.

Now, Rockmore extends the T series to the new ROK 550T, a five-inch class hammer model, which uses the industry standard QL5/QL50 bit shank, but with the blow tube/foot valve removed. With high-performance drilling characteristics rated for drilling 5.5in to 6.0in (140 to 152mm) diameter holes, the ROK 550T is suitable for blasthole applications in the mining and construction sectors and for deep-hole drilling in the water-well and geothermal sectors.

As with all Rockmore DTH hammers, the new ROK 550T uses Rockmore’s patented SonicFlow technology, which optimises airflow by simplifying and streamlining the air paths to minimise back flow and turbulence, thus delivering more energy to the piston, the manufacturer explained. Field testing of the SonicFlow design was determined to result in faster penetration rates and greater overall DTH hammer efficiency.