R2 R1 HF UNI - Variable Helix and unequal pitch - Corner radius CUTTING PARAMETERS INFO HF442 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 0.1D 1.5D x 0.1D 1.5D x 0.1D Vc (m/min) 160÷200 110÷130 80÷100 50÷70 D fz(mm)(mm/z) fz(mm/z) fz(mm/z) fz(mm/z) CARBIDEDRILLS 3 0.032 0.028 0.025 0.035 PU-HPU TROCHOIDAL 4 0.042 0.037 0.033 0.046 TA-4HTA 5 0.052 0.047 0.041 0.057 SUH 6 0.061 0.055 0.049 0.067 ALH 8 0.079 0.071 0.063 0.087 HRC 10 0.095 0.085 0.076 0.104 SUH MINI 12 0.108 0.097 0.086 0.119 HL 14 0.122 0.109 0.097 0.134 HSD 16 0.135 0.122 0.108 0.149 C-SD-TA 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. The cutting conditions are based on CNC programming with medium dynamic speed. With lower CNC dynamic speed, use the same cutting conditions or reduce the cutting speed Vc. HSS With higher CNC dynamic speed, reduce the “T” value by approximately -30 -50% and apply the maximum available cutting speed Vc. DRILLS ae R1 Cutter radiusR2Half of slot width LFTA T Programming width of cut SUTA ae Actual width of cut HSS-HSS/CO Y (+) Y X (+) T CARBIDE END-MILLS 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 409