Sandvik Coromant (Fair Lawn, N.J.) introduced on March 1 the CoroDrill 452 range of drills used to create rivet and bolt holes in stacked carbon fiber-reinforced plastics and metallic materials. Because each carbon fiber composite can have a unique construction and, therefore, make unique demands on processors, there is the risk of delamination or splintering during drilling steps. The CoroDrill geometries are designed to reduce this risk and ensure that stringent hole tolerances are met with exceptional hole finish and quality, particularly with respect to the prevention of exit-hole damage. Benefits of use include the elimination of secondary processing steps, such as de-burring. The tool range includes reamer geometries and a countersink tool with microstop for chamfering.
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