Solid Carbide Endmills H680 - High Precision Ball Nose Type - 2F 鎢鋼球型銑刀 - 標準型 - 2 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. . R tolerance ±5µm with high precision and high performance on Finishing working situation. . Special geometry design, suitable for high hardened working materials. Radius Dia. CL OAL Shank Flutes Order No. (R) (d) (L1) (L) (D) (F) EHBFF2 EHBSF2 EHBFF201000S 0.5R 1.0 2 50 4 2 EHBFF202000S 1.0R 2.0 4 50 4 2 EHBFF204000S 2.0R 4.0 8 50 4 2 EHBSF203000S 1.5R 3.0 6 50 6 2 EHBSF204000S 2.0R 4.0 8 50 6 2 EHBSF206000S 3.0R 6.0 12 50 6 2 R EHBSF208000S 4.0R 8.0 16 60 8 2 EHBSF210000S 5.0R 10.0 20 75 10 2 EHBSF212000S 6.0R 12.0 24 75 12 2 L1 L D 65 Cutting conditions ( 建議切削參數表 ) : Table 007 R Tolerance ≦ R3 ± 0.005 ≧ R4 ± 0.007 A016