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Gundrilling Technology
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Users around the world link the name
TBT with quality, reliability and customer relations. Since its
foundation in 1966 in Germany, TBT has specialized itself in Gundrilling
Technology , Gundrilling Machines
, and Gundrilling Tools. The only company in the
world that has expertise in all three!
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Introduction
Gundrilling is an efficient process to drill holes in materials such as
steel, titanium, copper, cast iron, aluminum and plastics. The process
is highly efficient for drilling deep and short holes, tight diameter
tolerances , surface finish quality and minimum run-out
. The gundrilling process thereby eliminates the need to ream or hone
the drilled bores, and does so with an extreme high repeatability
. Another characteristic of gundrilling is that it provides virtually
burr free bore intersections, bore entries and exits. A gundrilling
system consists of the gundrill, workpiece fixture, drill spindle,
coolant filtering, coolant supply, tool, coolant type and drill
parameters. Each component in this system is of crucial importance to
obtain a good process result.
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Tool
Technology
Traditionally gundrilling is executed with a single lipped drilling
tool. Because of its design, the tool needs to be guided by a bushing
during the drill initiation. The single lipped tool is especially
appropriate for drilling long chipping materials. For short cutting
materials double cutting tools can also be used. The carbide head of
the gundrill tool has 1-4
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supporting pads which provide the
characteristic burnishing effect of the gundrilling tool. The exact
position of the support pads has a great influence on the bore and
surface quality. The carbide type as well as the nose grind will
influence bore quality, run-out as well as tool life. See our Tool
Technology page for more details
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