Solid Carbide Endmills H680 - High Precision Long Shank Square Type - 4F 鎢鋼平銑刀 - 長柄型 - 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. Dia. CL OAL Shank Flutes Order No. (d) (L1) (L) (D) (F) EHSLF4 EHSNF4 EHSLF404000S 4.0 10 75 6 4 EHSLF406000S 6.0 15 75 6 4 EHSMF4 EHSNF406000S 6.0 15 100 6 4 EHSMF408000S 8.0 20 75 8 4 EHSLF408000S 8.0 20 100 8 4 EHSLF410000S 10.0 25 100 10 4 d EHSLF412000S 12.0 30 100 12 4 L1 L D 65 Cutting conditions ( 建議切削參數表 ) : Table 006 d Tolerance Ø ≦ 6 +0 ~ -0.02 Ø ≧ 8 +0 ~ -0.03 A015