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Solid Carbide Drill for CFRP/Titanium-Stack



Kennametal's B55_DAL drill is designed for drilling composite fiber-reinforced polymers (CFRP) metal stacks in hole diameter ranges of 3/16 - 5/8" (4.763 - 15.875 mm). The drill can be applied in all combinations of stacks: CFRP-Ti-Al as well as CFRP-Ti, CFRP-Al and also straight Ti or Al. These drills can operate with standard through coolant, MQL or dry.

"New materials are demanding new solutions," said a company spokesperson. "To maximize strength and minimize weight, the aerospace industry continues to research using stacks of CFRP sandwiched between titanium or other materials. This provides essential performance at reduced weight for wings, fuselages, cockpits and many other components. Due to the substantially different mechanical properties of carbon fibers and metals, drilling fastener holes efficiently challenges cutting tools by requiring high wear resistance and optimum tool geometries. Keeping holes high-quality and burr-free is critical."

The B55_DAL drill's double-angle point design is intended to provide enhanced centering capability and the sharp edge to cleanly cut CFRPs in the top layer of stacks and cleanly exit the titanium or aluminum side without burrs. The fine-grain solid-carbide Beyond KN15 grade is highly polished for enhanced chip evacuation even with MQL or dry operation.

A broad range of diameters and length variations are available to accommodate all holemaking operations, even those using robots or automated drilling units. In addition, the new stack drills can be reground to original process specifications.

For more information contact:

Kennametal Inc.

P.O. Box 231

1600 Technology Way

Latrobe, PA 15650

724-539-5000

www.kennametal.com

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