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DTH DRILLING rig available on the market. Meanwhile, the 5200 offers similar production capa- bilities to the 6200, but is fitted with an on-board booster compressor that can supply 460 liter/s at 24.1 bar (750 cfm at 350 psi). The Orion can also be changed from production drilling to blind-boring using a Machines Roger V-30 within a single shift, Cubex said, with both the Aries and Pegasus rigs also having this multi-func- tion capability. In general, applications for Cubex rigs include ring or fan drilling 50–155-mm (2–6½-in.) production holes, drilling large-diameter holes for slot raising, and being used with a reverse-circulation hammer for grade control and ore definition. Raise-drilling with DTH Hammers Sandvik supplies its RH550 DTH hammer in six sizes, from 3 in. to 8 in. (Photo courtesy of Sandvik) Sandvik and Cubex extended this agree- ment a year later to include Cubex's QXR surface DTH range, which Sandvik now markets as its DR540, DR560 and DR580 models. Cubex In-the-Hole From an initial response to the Canadian mining industry's need for accurate blast- holes underground, today Cubex has established itself as a major world sup- plier of ITH drill rigs. The company pro- duces both wheeled and tracked machines that can be customized to answer specific application needs, together with air-pressure booster units that give the rigs greater input power and productivity. The rubber-tired range includes the Aries and Pegasus rigs, designed for con- ventional compressed-air ITH, and the Aquarius, which carries a Wassara water- powered drill system. The Aries' capabil- ities cover 92–216 mm (3⅝–8½ in.)- diameter holes, while the Pegasus can drill 89–203 mm (3½–8 in.), with both rigs capable of at least 100-m (330-ft) hole depths. The Aquarius, meanwhile, can be equipped with a Wassara W80 hammer for 89–114 mm (3½–4½ in.) holes, or a W100 for 114–127 mm (4½–5½ in.) holes, with a comparable depth capability. Tracked rigs include the 5200, 6200 and Orion, which can be used to drill 76 E&MJ; • SEPTEMBER 2012 89–762 mm (3½–30 in.)-diameter holes, and can be used for reaming up to 445-mm (17½-in.) holes using a 12 in. hammer. The 6200 is available in two versions, one of which, the 6200N, the company claims to be the narrowest ITH Marketed since 1984 by Québec-based Machines Roger International, the V-30 raise drill is based on DTH hammer tech- nology, with a difference. The company reports that it has sold its equipment, which consists of twin 6-in. hammers mounted on a high-strength chassis, to mine operators in Canada, the U.S., Brazil, Turkey, Australia, Spain, Ghana and Tanzania. Sandvik's DR560s are powered by a Cummins QSK23 diesel producing 860 hp (641 kW); a Caterpillar C27 engine is option- al. These rigs are highly versatile: with the feed mast and cab mounted on independent booms, setup from hole to hole can be quicker and easier with the cab able to swing away from a nearby face when necessary. www.e-mj.com