HF UNI - Variable Helix and unequal pitch - Corner radius CUTTING PARAMETERS INFO HF842 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) 190÷230 130÷150 100÷120 50÷70 CARBIDEDRILLS D fz fz fz fz(mm)(mm/z)(mm/z)(mm/z)(mm/z) 3 0.035 0.032 0.028 0.039 PU-HPU TA-4HTA TROCHOIDALSUH 45 0.0460.058 0.0420.052 0.0370.046 0.0510.063 ALH 6 0.068 0.061 0.054 0.074 HRC 8 0.088 0.079 0.070 0.096 SUH MINI 10 0.105 0.095 0.084 0.116 HL 12 0.120 0.108 0.096 0.132 HSD 14 0.135 0.122 0.108 0.149 C-SD-TA 16 0.150 0.135 0.120 0.165 18 0.165 0.149 0.132 0.182 20 0.183 0.164 0.146 0.201 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. LFTA SUTA ae R1 Cutter radius HSS-HSS/CO R2 Half of slot width 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 404 R2 R1