HF UNI - Variable Helix and unequal pitch - 45° chamfer CUTTING PARAMETERS INFO HF844 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 D x 0.4D D x 0.4D D x 0.25D D x 0.25D Vc (m/min) 100÷120 60÷80 45÷65 30÷40 CARBIDEDRILLS D fz fz fz fz(mm)(mm/z)(mm/z)(mm/z)(mm/z) VERTICAL 6 0.029 0.026 0.022 0.020 PU-HPU TA-4HTA 8 0.038 0.034 0.028 0.026 SUH 10 0.045 0.041 0.034 0.032 ALH 12 0.052 0.047 0.039 0.036 HRC 14 0.058 0.052 0.044 0.041 SUH MINI 16 0.065 0.058 0.049 0.045 HL 20 0.079 0.071 0.059 0.055 HSD C-SD-TA Material Group P1 P2 P7 K1 P3 P4 M1 K2 K3 P5 M2 M3 K4 S1 S4 S2 S3 S5 ISO 513 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 fz fz fz (mm) (mm/z) (mm/z) (mm/z) (mm/z) HSS TROCHOIDAL 6 0.073 0.066 0.058 0.080 DRILLS 8 0.095 0.085 0.076 0.104 10 0.113 0.102 0.091 0.125 LFTA 12 0.130 0.117 0.104 0.143 SUTAHSS-HSS/CO 14 0.146 0.131 0.117 0.160 16 0.162 0.146 0.130 0.178 20 0.197 0.177 0.158 0.217 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. CARBIDE With lower CNC dynamic speed, use the same cutting conditions or reduce the cutting speed Vc. END-MILLS With higher CNC dynamic speed, reduce the “T” value by approximately -30 -50% and apply the maximum available cutting speed Vc. G2 ae R1 Cutter radius MDTA R2 Half of slot width HF VH/UP T Programming width of cut MEF ae Actual width of cut ALU MEX/MH UH/MH Y (+) Y X (+) T HSS END-MILLS CARBIDE BURRS PARAMETERS SUGGESTED WITH HIGH POWER MILLING CHUCK AND STABLE MACHINING CONDITION 388 R2 R1