HF UNI - Variable Helix and unequal pitch - 45° chamfer CUTTING PARAMETERS INFO HF440 Material GroupISO 513 P1 P2 P7 K1 P3 P4 M1 K2 K3 P5 M2 M3 K4 S1 S4 S2 S3 S5 Hardness/Rm ≤700 N/mm² 600÷1000 N/mm² ≤35 HRC ≤40 HRC ap x ae 2D x 0.2D 2D x 0.2D 1.5D x 0.1D 1.5D x 0.1D Vc (m/min) 160÷200 110÷130 80÷100 50÷70 CARBIDEDRILLS D fz fz fz fz(mm)(mm/z)(mm/z)(mm/z)(mm/z) 3 0.032 0.028 0.025 0.035 PU-HPU TA-4HTA TROCHOIDAL 4 0.042 0.037 0.033 0.046 SUH 5 0.052 0.047 0.041 0.057 ALH 6 0.061 0.055 0.049 0.067 HRC 8 0.079 0.071 0.063 0.087 SUH MINI 10 0.095 0.085 0.076 0.104 HL 12 0.108 0.097 0.086 0.119 HSD 14 0.122 0.109 0.097 0.134 C-SD-TA 16 0.135 0.122 0.108 0.149 20 0.164 0.148 0.131 0.181 ap x ae ≤ D5 1.5D x 0.1D 1.5D x 0.1D NOTES: Down milling CNC programming is required. “ae” value max 0.2xD - “T” value max 0.1xD. The use of end mill with diameter 30-40% smaller than the width of the slot is recommended. HSS The cutting conditions are based on CNC programming with medium dynamic speed. DRILLS With lower CNC dynamic speed, use the same cutting conditions or reduce the cutting speed Vc. With higher CNC dynamic speed, reduce the “T” value by approximately -30 -50% and apply the maximum available cutting speed Vc. LFTASUTA ae R1 Cutter radiusR2Half of slot width HSS-HSS/CO T Programming width of cut ae Actual width of cut Y (+) Y X (+) CARBIDE END-MILLS T G2 MDTA HF VH/UP MEF ALU MEX/MH UH/MH HSS END-MILLS CARBIDE BURRS PARAMETERS SUGGESTED WITH HIGH POWER MILLING CHUCK AND STABLE MACHINING CONDITION 378 R2 R1