Брошюра Dormer Pramet новинки 2021 - страница 16

S791 S791 BARREL END MILL SOLID MILLING CUTTERS INTRODUCTION We have launched an advanced barrel-shaped end mill for efficient five- axis machining in die and mold and aerospace applications. The new S791 cutter provides excellent surface quality and is suitable for semi-finishing and finishing in steels, stainless steels, cast iron and super-alloys. Its design includes a nose radius for fillet milling and a tangential form radius for curved and deep wall surface machining. FEATURES & BENEFITS • A larger tangential radius with more overlap Barrel Ball Nose compared with conventional ball nose end mills. End Mill End Mill This enables:​ • A greater area of contact with the workpiece, increasing tool life and reducing cycle time. ​ ap ap • Fewer passes, leading to more than 50% time savings. ​ • Better surface quality and characteristics, minimizing the time spent polishing.​ • An AlCrN coating for thermal stability, reduced • All the benefits usually associated with a robust ball friction, excellent wear resistance and prolonged nose end mill.​ durability. ​ • Positive rake angle for smooth cutting action in stainless steels and super-alloys, reducing the risk of work-hardening​. Larger tangential radius • Several three or four-flutes options for more productivity (compared to common two-flute ball Noseradius nose cutters). MACHINING EXAMPLE S791 Workpiece material: DIN 1.2311 (WMG P3.3), 300-320 HB Tool diameter: 10 mm Operation: Finishing angled wall 10° Coolant: Air S791 Barrel End Mill Ballnose End Mill Tool radius mm 85 5 No.of flutes 4 2 Cutting speed vc m/min 150 120 Feed f mm 0,05 0,05 Depth of cut ap mm 2,5 0,5 Width of cut ae mm 0,5 0,5 No.of passes 33 165 Time in cut min 4:30 21:10 15