DTH Hammers are Compact, Lighter and More Durable
Boart Longyear has introduced its BLH
series of down-the-hole (DTH) hammers
and bits for almost all DTH applications,
including geotechnical drilling, quarrying/
mining, water well/geothermal, and mineral
exploration. The BLH DTH hammer range
includes the valved BLH5, BLH3, and the
valve-less BLH1 models. Designed to be
compact, the BLH5 hammer is 30% shorter and weighs 20% less than typical DTH
hammers, according to the company. Design benefits include balanced operation
with minimized vibration due to the piston
in the hammer having virtually the same
mass as the bit; better productivity in various ground conditions from high frequency,
low vibration operation; elimination of
problematic exhaust tubes or foot valves on
bits; and resistance to breakage through
the splines with a 50% larger shank cross
section than comparable units. The BLH3
DTH hammer range, said the company,
adds a reliable and robust steel valve system to increase productivity over valve-less
hammers. The valve-less BLH1 DTH hammer range balances simplicity and performance, with minimal moving parts.
Boart Longyear DTH hammers range from
4 in. to 20 in., with a full complement of
bits available. Boart Longyear also offers
accessories including lubrication systems
and break-out benches.
www.boartlongyear.com
As featured in Womp 2014 Vol 06 - www.womp-int.com
