Walter AG has introduced the new Xtra·tec®S3 milling cutter series, expanding its indexable insert milling cutter range with a new line of milling cutters designed to address market demands for greater cutting depths, higher feed rates, and maximum stability under difficult cutting conditions and with unstable workpieces.
According to the company, the name S3 represents the series’ three core advantages: Stability, Supply, and Selection. The first tool in the series, the new M6420 high-feed milling cutter, has been developed to meet these requirements with an innovative, patent-pending chip space design that enables reliable chip evacuation even with high chip volumes.
The company stated that the design allows large amounts of chips to be safely evacuated, particularly during roughing applications across a wide range of ISO materials.
Higher rigidity for low-vibration cuts
The stability of the new series is achieved through an innovative, patent-pending, vibration-damping chip-flute design. The cutter body itself has up to 30% higher rigidity (according to FEM analysis), which in turn extends tool life. High cutting forces acting on the cutter body, particularly during high-feed milling strategies, are effectively minimized. In combination with the large contact and support surfaces of the M6420, feeds of up to 3 mm per tooth can also be reliably achieved.
Maximum cooling for efficient chip evacuation
Another decisive factor for the performance and long tool life is the optimized coolant supply: With up to three coolant channels per insert seat, the milling cutter makes maximum use of the coolant volume available from the machine without any loss of pressure. The targeted supply increases the coolant volume by 48 percent, which lowers the temperature at the cutting edge while ensuring efficient chip removal—especially at high feed rates and large cutting depths.
Intuitive handling and increased cost-effectiveness
To simplify handling in everyday production, Walter relies on a user-friendly, intuitive selection system for the S3 series based on a self-explanatory nomenclature of insert geometries: L5 (= Light-cutting geometry), M5 (= Medium geometry), and R5 (= Roughing geometry). The easy identification via the initial letters improves handling. With four cutting edges per insert and wear-resistant Tiger·tec®Gold grades, Walter further increases cost-effectiveness.
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