Solid Carbide Endmills H680 - High Precision Long Shank Corner Radius Type - 4F 鎢鋼圓鼻銑刀 - 長柄型 - 4 刃 . 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. Corner Dia. CL OAL Shank Flutes Order No. Radius (d) (L1) (L) (D) (F) EHCLF4 (R) EHCNF4 EHCLF404005S 4 0.5R 8 75 6 4 EHCMF4 EHCLF406005S 6 0.5R 12 75 6 4 EHCNF406005S 6 0.5R 12 100 6 4 EHCMF408005S 8 0.5R 16 75 8 4 EHCLF408005S 8 0.5R 16 100 8 4 EHCLF410005S 10 0.5R 20 100 10 4 d R EHCLF412005S 12 0.5R 24 100 12 4 L1 L D 65 Cutting conditions ( 建議切削參數表 ) : Table 006 d R Tolerance Ø ≦ 6 +0 ~ -0.02 Ø ≧ 8 +0 ~ -0.03 R ± 0.015 A020