Corodrill Delta-C R854 New Revolutionary Frontier in Aerospace Composite Drilling Applications
Press Information
June 2009
CoroDrill Delta-C R854 – new revolutionary frontier in aerospace composite drilling applications
Sandvik Coromant has released the CoroDrill Delta-C R854 solid carbide drill for aerospace applications such as the drilling of CFRP composites. Not only does the special spur point geometry and new diamond coating virtually eliminate conventional composite drilling problems, such as delamination and splintering, it also offers up to three times greater tool life when tested against equivalent competitor products at identical speeds and feeds.
The exceptional strength-to-weight ratio of carbon fibre reinforced plastic (CFRP) composite has ensured its evolution into the material of choice for a growing number of applications, predominantly in the aerospace and motorsport industries. However, the very nature of CFRP, commonly combined with aluminium alloy or titanium, results in the generation of high cutting forces when drilling that can lead to delamination, splintering and fraying.
But now a new solution is available. Thanks to an innovative diamond coating and new spur point geometry, CoroDrill Delta-C R854 is yet further evidence of the extensive process knowledge possessed by Sandvik Coromant design engineers.
The new N30C wear resistant diamond coating is designed to reduce downtime by improving security and tool life in very abrasive materials such as CFRP. Its thin coating in combination with micro-grain substrate ensures easy cutting action for more accurate holes with less friction through sharper cutting edges. Additionally, the unique low thrust geometry provided on CoroDrill Delta-C R854 reduces axial pressure, which in turn decreases deflection in thin-walled parts, helping to minimize common problems.
In recent company tests, a 6.35 mm (1/4”) CoroDrill Delta-C R854 was subjected to two CFRP drilling trials in comparison with a competitor equivalent product claiming to be the current market leader. Both drills were put to work, firstly at 100 m/min speed and 0.05 mm/rev feed, and then at 200 m/min and 0.03 mm/rev. While the competitor drill exhibited considerable problems with delamination and splintering, the holes produced by CoroDrill Delta-C R854 were virtually free of any such visible problems
CoroDrill Delta-C R854 comes in diameters ranging from 2.38 up to 20 mm, and in lengths up to 310 mm. It is also available in many different combinations, such as with or without chamfer for countersink operations
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Photo Caption:CoroDrill Delta – C R854
Sandvik Coromant
Sandvik Coromant, a product area within Sandvik Tooling, is a global leading name in cutting tools for turning, milling and drilling as well as modular tooling systems for lathes and machining centres. With some 8,000 employees, Sandvik Coromant is represented by its own sales personnel and specialists in more than 60 countries. In addition there is an established distributor network. 20 state-of-the-art Productivity Centres located around the world provide customers and Coromant personnel with training in tooling solutions for increased productivity.
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