Solid Carbide Endmills H680 - High Precision Corner Radius Type - 4F 鎢鋼圓鼻銑刀 - 標準型 - 4 刃 . SICO-TH Nano coating provides a superior wear and heat resistance. Solid Carbide Endmills . 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. Corner Dia. CL OAL Shank Flutes Order No. Radius (d) (L1) (L) (D) (F) (R) EHCSF4 EHCSF403005S 3.0 0.5R 6 50 6 4 EHCSF404005S 4.0 0.5R 8 50 6 4 EHCSF404005S 4.0 0.5R 8 50 6 4 EHCSF406005S 6.0 0.5R 12 50 6 4 EHCSF406010S 6.0 1R 12 50 6 4 EHCSF408005S 8.0 0.5R 16 60 8 4 d R EHCSF408010S 8.0 1R 16 60 8 4 EHCSF410005S 10.0 0.5R 20 75 10 4 EHCSF410010S 10.0 1R 20 75 10 4 L1 EHCSF412005S 12.0 0.5R 24 75 12 4 EHCSF412010S 12.0 1R 24 75 12 4 L D 65 Cutting conditions ( 建議切削參數表 ) : Table 006 d R Tolerance Ø ≦ 6 +0 ~ -0.01 Ø ≧ 8 +0 ~ -0.02 R ± 0.01 A019