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Walter’s DC175 Supreme solid carbide drill with precision cooling is designed for machining ISO M (stainless steel) and S (superalloy) materials. This drill uses an optimized exit hole strategy to increase volume of coolant close to the main cutting edge, which can improve tool life. The drills can be used with emulsion or oil as coolant. The new point geometry features a tough, straight main cutting edge, a large clearance in the center and coolant channels positioned close to the cutting edge.

The company’s WJ30RZ and WJ30RY grades are designed to be highly wear-resistant. A TiAlSiN-based layer applied using HIPIMS coating technology takes the form of a complete coating for 3 and 5×Dc (WJ30RZ grade) and a point coating for 8×Dc (WJ30RY grade). The 8×Dc version also features a polished flute for deep drilling, resulting in a smooth surface meant to ensure optimum chip evacuation and minimizes built-up edges. 

The drill is available in diameters ranging from 0.118-0.787 in. (3-20 mm) 3×Dc in accordance with DIN 6537 short, 5×Dc in accordance with DIN 6537 long and 8×Dc in accordance with Walter standard L/D ratios. It is well-suited for general metalworking, automotive, aeronautical and the food and medical industries, according to Walter.

There are three designations to Walter product technology: Perform, Advance and Supreme. The company says its Supreme designation indicates the highest level of technology and performance available for a high productivity, high production volume environment.