RAMMER 2155E, Operator'S Manual, Page: 27 / 80

Operation - Page 27 COPYRIGHT © 2019 SANDVIK MINING AND CONSTRUCTION OY
Operation 2155E STD
Penetrative breaking (or cutting)
In this form of breaking a moil point or chisel tool is forced inside the material. This
method is most effective in soft, layered or plastic, low abrasive material. The high
impact rate of the small hammers makes them ideal for penetrative breaking.
Impact breaking
With impact breaking, the material is broken by transferring very strong mechanical
stress waves from the tool into the material. Impact breaking is most effective in
hard, brittle and very abrasive materials. The high impact energy of the big
hammers makes them ideal for impact breaking. The best possible energy transfer
between the tool and the object is achieved with a blunt tool. The use of a chisel tool
in hard material will cause the sharp edge to wear very quickly.
CHOOSING TOOLS
A selection of standard and special tools to suit each application are available. The
correct type of tool must be selected to get the best possible working results and
longest life time for the tool. Choosing the best tool type for an application may
require some testing, please consult with your local dealer. See “Tool
specifications” on page 74.
Chisel, moil point and pyramid
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For sedimentary (e.g. sandstone) and weak metamorphic rock into which the
tool penetrates.
■
Concrete.
■
Trenching and benching.
Blunt tool
■
For igneous (e.g. granite) and tough metamorphic rock (e.g. gneiss) into which
the tool doesn't penetrate.
■
Concrete.
■
Breaking boulders.