Milling Cutters feature positive rake insert topography.
Press Release Summary:
Suited for cast iron milling, M750 Hexacut Line features 8 in. cutter, 45° lead angle roughing cutter, three 30° lead angle cutters, 30° lead angle roughing cutter, and two 30° lead angle finishing and semifinishing cutters. All use 2-sided, hexagonal inserts with 12 true cutting edges. Double negative geometry provides strength needed for high metal removal rates. Diameters range from 3-12 in. and 80-315 mm. Variety of coated carbide grades are available.
Original Press Release:
Kennametal Introduces M750 Cast Iron Milling Program
(Latrobe, Pennsylvania, U.S.A.; September 20, 2004) -- Kennametal has introduced a new high-insert-density cast and ductile iron face milling program capable of high metal removal rates. The new milling cutters offer higher productivity than any other Kennametal cast iron cutters because of their high insert density. The eight-inch cutter has, for example, 28 inserts, double negative geometry, and positive rake insert topography. The new M750 Hexacut milling program is ideal for transfer lines and high-performance machining centers, such as those with CAT50 taper and larger HSK spindles. The program includes a 45 degree lead angle roughing cutter and three 30 degree lead angle cutters. There is a 30 degree lead angle roughing cutter and two 30 degree lead angle finishing and semifinishing cutters. One of the 30 degree lead angle finishing and semifinishing cutters is designed to provide reduced cutting pressure for lighter duty machines and thin wall parts. "All cutters in the new line offer lower tooling costs than competitive high-density cutters because our cutters use two-sided, hexagonal inserts with 12 true cutting edges, compared to only six or eight cutting edges for competition," said Tim Marshall, Milling Product Manager for Kennametal.
Kennametal M750 Hexacut milling cutters are available in diameters from 3 inches to 12 inches and 80 mm to 315 mm metric diameters. The larger diameter cutters feature a two-piece design, consisting of an adapter ring and a spindle plate, for easier handling. An 8-inch cutter running at a chipload of 0.010 inch will feed at 0.140 inch per revolution so a 500 rpm spindle speed will provide a 140 ipm feed rate. The double negative geometry of the new line provides the strength needed for high metal removal rates while the positive insert topography reduces cutting pressures in order to lower horsepower requirements. The 45 lead angle cutter is the first choice for roughing operations because of its high strength while the 30 degree lead angle roughing cutter offers an alternative for reducing breakout and also accepts wiper inserts. The 8-inch diameter 30 degree lead angle semifinishing and finish cutters accept up to five wiper inserts while the 3 inch cutters accept up to two. One of the two styles of 30-degree lead angle finishing cutters has the wiping facet offset slightly to reduce cutting pressure while the other style offers higher strength.
Kennametal offers a large selection of coated carbide grades for the M750 Hexacut milling program, all of which are engineered to give a higher level of performance when machining cast and ductile irons. TN5505, TN5515, and TN5520, are coated with a medium temperature chemical vapor deposition multilayer coating designed specially for cast and ductile irons. Three additional grades, KYON3500, KC915M, and KC935M provide high metal removal rates and increased productivity. KC915M is the first choice grade in milling cast irons at higher speeds. It offers a MTCVD multi-layer coating for longer tool life. KYON 3500 ceramic inserts offer the ultimate in productivity and tool life for cast iron milling due to its high-speed capability. KC935M is an aluminum oxide coated grade that offers extremely high cutting speeds, providing significant productivity gains on a wide range of ferrous materials.
For more information about Kennametal products, please call 800-446-7738 or visit www.kennametal.com
