The double-sided square insert incorporates a concave cutting-edge profile with a large inclination angle. This design improves swarf evacuation and generates barrel-shaped chips, a feature that prevents swarf re-cutting. The inserts incorporate a large rake angle that generates low cutting forces and a smooth cutting action, thus reducing stress and force on both the machine spindle and cutting tool. This capability makes the cutter suitable for customers operating low-powered machine tools, or working with low rigidity or weak fixture settings.

DoQuad-Mill offers cutter diameters ranging from 50 to 100 mm diameter in either standard or close-pitch insert designation. The standard pitch variant is designed to ensure chatter-free milling, whereas the close-pitch cutter is suited to applications where high-feed and high-speed machining is essential. DoQuad-Mill inserts are available with corner radii of 0.8, 1.2 and 2.0 mm. For precision machining applications that require high-quality surface finishes, a wiper insert can also be offered.

The DoQuad-Mill is available with a selection of insert grades and coatings to cater for the machining of various material types. This choice includes the AH3135 PVD grade, which has a high fracture resistance, making it the company’s first choice grade for machining steel and stainless steel.

Complementing the AH3135 is the AH120, a PVD grade for general milling applications in steel and cast iron. For machining cast iron at high speed, the DoQuad-Mill can also accommodate the Tungaloy T1215 CVD grade, which is said to demonstrate high levels of wear and chipping resistance.

When it comes to the high-speed machining of both steel and stainless, the T3225 grade is the company’s first choice grade. The tool life, longevity and performance of this insert grade is enhanced by Tungaloy’s proprietary PremiumTec surface technology. Increasing both toughness on the coating and surface smoothness, PremiumTec has been designed to improve chipping resistance, eliminate built-up-edge and increase fracture resistance.