NEW EQUIPMENT NEWS
Sandvik adds even more power to its range
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that are wear-resistant on the outside,
while the centre provides a toughness
that pushes the service life and grinding
intervals even further.
The SH70, which is developed for
hard, competent ground, is a grade with
homogeneous properties throughout the
material. SH70 is called ‘self-hardening’
because the enhanced deformation
hardening makes it more wear resistant
as you drill with it. The surface hardness
is continuously ‘refilled’, which means
that the hard top never wears off.
“Controlling the whole chain, all the
way from our own tungsten mine to
the production of drill bits, is a unique
enabler for developing ground-breaking
rock tools,” says Grandin.
As the most significant carbide
innovation in the rock drilling industry
for decades, Sandvik is launching two
new carbide grades to the PowerCarbide
family. The new grades extend grinding
intervals and service life by up to 30%
compared with standard carbides.
The new PowerCarbide grades, GC80
(Gradient Carbide) and SH70 (Self-
Hardening) give users several other
benefits such as lower cost per drilled
metre, less time for changing bits and
improved safety.
“Sandvik was the first company
in drilling history to manufacture rock
tools with cemented carbide and are
working continuously on developing
new and more advanced solutions. The
new PowerCarbide grades are based on
improved knowledge about the wear of
drill bits in different types of rock,” says
Robert Grandin, product manager for
Underground Top Hammer at Sandvik
Rock Tools.
The GC80 is developed for abrasive
ground conditions with high silica levels
in the rock. A new, unique method
makes it possible to produce buttons
Sandvik’s two new carbide grades are the most significant carbide innovation in the
rock drilling industry for decades.
JULY 2019
13