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Sandvik Coromant’s new CoroDrill® solid carbide drills for HRSA, titanium and composite workpieces

Photo by Sandvik Coromant

Sandvik Coromant, the world leader in tools and cutting solutions, is introducing two new solid carbide drills designed to improve the durability and performance of drilling on components made of challenging aerospace materials such as heat resistant superalloys (HRSAs), titanium alloys and composites.

“There are special challenges in drilling these aerospace materials,” explains James Thorpe, Global Product Manager Drilling at Sandvik Coromant. “For example, the fatigue strength, hardness and toughness of HRSA materials at high temperatures develop a number of drill wear mechanisms. Aaron Howcroft, Global Product Manager Composites at Sandvik Coromant, adds: “With composite materials, on the other hand, the individual layers can easily separate under the mechanical stress of drilling – a process known as delamination. Our new CoroDrill® solutions are specifically designed to solve such problems and improve tool life and performance.”

The new CoroDrill 860 solid carbide drill with -SM geometry was developed to provide stable process reliability, high hole integrity and excellent tool life. This makes it the first choice for quality assurance in drilling in ISO-S materials such as heat-resistant superalloys, including Inconel, Waspalloy, Hastelloy and Udimet.

The solid carbide drill CoroDrill 860 with -SM geometry is available in the new grade GC1210, which is intended to guarantee a significant reduction in flank wear compared to existing solutions. The result is a consistent and reliable cutting edge, which in turn provides excellent dimensional accuracy and a better finish bore tolerance. For this reason, the drill is also ideal for unmanned production where users can benefit from a significant reduction in component scrap. In addition, the overall cost per hole is reduced.

Key applications in the aerospace industry where the CoroDrill 860 solid carbide drill with -SM geometry excels include bosses, scallop and flange faces on housings and other features on low-pressure/high-pressure turbine discs and blisks. The range exclusively comprises tools with internal coolant supply and ranges from 2xD to 5xD and diameters from 3 to 16 mm.

In addition, Sandvik Coromant now offers the CoroDrill 863 solid carbide drill with -O-geometry, an optimized solution for aerospace components made of composite materials. The new grade offers improved wear resistance with excellent tool life and very high hole integrity. Thanks to a positive chip angle, delamination can be reduced with unidirectional CFRP (carbon fiber reinforced plastic).

The service life is significantly improved by using the CoroDrill 863 solid carbide drill with -O-geometry. A further advantage of the repeatable and reliable drill is the reduced number of tool changes. Typical composite parts are aircraft frames, wing boxes, fuselage parts, stabilizers, floor beams and landing flaps. The range includes drills from 4xD to 5xD and diameters from 3 to 10 mm.

For more information, please visit: https://www.sandvik.coromant.com/en-gb/pages/default.aspx