The latest additions to Rockmore International’s (global manufacturer of rock drilling tools) ROK Series DTH Hammer product line are the ROK 500 and 500Q. These new patented 127 mm diameter class hammers will be officially released at CONEXPO-CON/AGG in Las Vegas on March 22, 2011. International Mining is attending that event.“Our mission is to provide our customers with the finest quality equipment possible, and ensure it integrates fully with their drilling operations,” said Pejman Eghdami, Executive Vice President of Rockmore International. “The release of the ROK 500 and 500Q expands the full range of our DTH hammer line from 3″ to 8″ (76 – 203 mm) diameters.” Designed to increase drilling efficiency, the ROK 500 accommodates two different air packages, to match any working conditions. The ROK 500 hammer is rated for use with large compressors: 24.1 bar (350 psi) at 28.6 m3/min. The ROK 500Q hammer is designed for smaller compressors: 24.1bar at 23.4 m3/min.As with all of Rockmore’s DTH hammers, the 500 and 500Q take full advantage of Rockmore’s patented SonicFlow technology, which optimises airflow by simplifying and streamlining the air path to minimise backflow and turbulence, thus delivering more energy to the piston. Optional back reaming buttons on the Top Sub offer increased drill life. Field testing of the SonicFlow design was found to result in faster penetration rates and greater overall efficiency.The ROK 500 and 500Q have been built to withstand the toughest rock drilling conditions. The solid piston design is made from an advanced material that is case hardened, combining high strength with supreme wear resistance. The high frequency, reciprocating piston is designed to strike the bit with maximum force. An innovative new design, unique to Rockmore hammers, reduces the number of hammer components, thus reducing the amount of component wear points, making hammer service simpler and less expensive.Unique lead threads on the Top Sub and Driver Sub ensure easy coupling and uncoupling of the hammer.The ROK 500 and 500Q are 127 mm diameter class hammers which accept industry standard drill bits with 12 spline Ingersoll Rand QL5 / QL50 shanks. Recommended bit sizes range from 140 to 152 mm. These new hammers are offered with multiple pin connection options: 2 ⅜” API Reg Pin, 3 ½” API Reg Pin and CUBEX® #28 pin with splines.