CoroDrills for Automotive Aluminum Parts

Automotive manufacturers have implemented some aluminum parts to reduce vehicle weight and improve fuel efficiency. Therefore, Sandvik Coromant offers two drills, CoroDrill 400 and CoroDrill 430, designed for machining of components in medium-to-high volumes. The drills are both available in N1BU solid-carbide grade. CoroDrill 430 can also be selected in the N1DU polycrystalline diamond (PCD) grade. N1DU provides PCD across the entire cutting edge, thus enabling longer tool life, the company says. Because of PCD’s low coefficient of friction and high conductivity of heat, the tool’s cutting edges are less susceptible to built-up edge (BUE). The company recommends using the solid-carbide grade when the hole count is low and handling risk is high. The PCD grade is said to be preferable when the hole count is high and higher productivity is required.

The company recommends CoroDrill 400 for drilling into solid material, as it features more flute volume for better chip evacuation. When drilling into cored material or pre-cast holes, CoroDrill 430 is said to perform better, as it features three flutes for stability and holding position regardless of misaligned cored holes.

Additional features include polished flutes and precision coolant holes, with support provided for minimum quantity lubrication. The drills are available as standard products in 5, 6.8, 7, 8.5, 10.2 and 12.5 mm diameters, which correspond to M6, M8, M10, M12 and M14 thread sizes. Tailor made options can be specified for other applications. The drills are supported by CoroTap 100, 200, 300 and 400, a series of taps that are designed for use in ISO N materials.