DTH Hammer With Higher Striking Power

Sandvik unveiled the RH560 down-the-hole (DTH) hammer, which delivers a long service life that reduces drilling costs, the company reported. Enhanced air cycle and piston design deliver higher striking power, while fewer internal parts provide outstanding reliability, minimizing failures and downtime. In tests in varying rock condition, the hammer delivered up to a 15% increase in penetration rate, with smoother collaring and straighter blast holes, Sandvik reported. It also enables the drilling of larger holes at the same speed as a smaller hole with a standard hammer. Separately, Sandvik introduced the RR441 rotary bit, an improved version of the RR440 and designed to last up to 140% longer than predecessor competition, the company reported. The RR441 provides excellent class-leading bearing life, simplification of the bearing system, improvements in air fl ow, and superior wear protection in soft rock applications, Sandvik reported. Sizes range from 171 mm to 406 mm. It comes equipped with an improved durability dual-seal journal bearing.
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