Solid Carbide Endmills H680 - High Precision ∙ Square ∙ 4F .SICO-TH Nano coating provides a superior wear and heat resistance. .Suitable for HRC 50 and over HRC 50 Hardened Steel, also maximum up to HRC 65. .Ultra grain carbide rods with better abrasion resistance. .Special geometry design, suitable for high hardened working materials. Order No. Dia.(d) CL(L1) OAL Shank Flutes(L)(D)(F) EHSSF * EHSSF441000S 1.0 3 50 4 4 * EHSSF441500S 1.5 4 50 4 4 * EHSSF442000S 2.0 5 50 4 4 P M K N S H * EHSSF442500S 2.5 6 50 4 4 ● ○ ● ○ ● EHSSF403000S 3.0 8 50 6 4 EHSSF404000S 4.0 10 50 6 4 d EHSSF405000S 5.0 13 50 6 4 EHSSF406000S 6.0 15 50 6 4 EHSSF408000S 8.0 20 60 8 4 L1 EHSSF410000S 10.0 25 75 10 4 EHSSF412000S 12.0 30 75 12 4 L D (h5) Cutting conditions : Table 006 d Tolerance d≤6 0 ~ -0.01 d>6 0 ~ -0.02 A017