TURNINGTAPPINGHOLEMAKINGSOLID END MILLINGINDEXABLE MILLING High-Performance Solid Carbide End Mills Trochoidal Milling TTConventional Slotting • Full slotting limitations: — Usually not more then ap = 1 x D. — Conventional and climb milling at the same time. — High heat development on the tool and on the workpiece. — Difficult chip evacuation. — High radial forces. • This means: — No constant chip thickness. — Low MRR. — Surface quality from the left to right side are different. — Limited tool life. — High power and torque requirements for the machine. fz = feed per tooth [mm/z] n Feed direction hm = average chip thickness [mm] TTae and Chip Thickness fz n d1 ae hm To calculate average chip thickness: hm = fz • ( a)e d1 Simplified formula for shown application and 90° angles on the tool. The chip thickness defines the load on the cutting edge. widia.com B55