Upgrades in the D-family

This year, the ROC D-family of surface rigs celebrates its sixth anniversary. Since the first rig was delivered in 1999, its popularity has been impressive. Soon, rig No. 1,000 will be delivered to the U.S. Now, a new, upgraded family of Drigs has been launched with a stronger and stiffer boom for better collaring and more stable drilling. The boom is also able to carry future optional equipment, such as the Silencing Kit (see below). Featuring a new engine with variable rpm (CAT 6.6), the rig meets the new exhaust
emission limits in Tier 3/Stage 3. Besides engine improvements, the rig design has also been upgraded. For example, a new air-conditioning and heating system with a much higher capacity
will provide more comfort for the operator. The rig also provides better balance and stability in the toughest terrain. Among the D-series rigs, the new ROC D7C has the most versatile functions
including upgraded software as well as the option of a Long Mast version. In the beginning of 2006, another member will join the D-family ? ROC D9. This one will have a more powerful rock drill, COP 2160, for holes varying from 89-115 mm.