SQUAREBALLRADIUSTAPERBARRELROUGHINGSOLID END MILLS DC BD No. of Flutes Stock Type Effective length DCON IMPACT MIRACLE END MILLS VF3XB 30° Ball nose, Medium cut length, 3 flute, Taper neck CARBIDE Carbon Steel, Alloy Steel, Cast Iron Tool Steel, Pre-Hardened Steel, Hardened Steel Hardened Steel(<30HRC)( < 45HRC)( < 55HRC)Hardened Steel(>55HRC)AusteniticTitanium Alloy,Stainless SteelHeat Resistant AlloyCopper AlloyAluminum Alloy u e e e BHTA2 B2 Type 1 APMX BHTA3 20° RE LU LB2 LF 0.4< RE< 2.5 Effective length ±0.01 for inclined angle 0.8< DC< 5 0 - 0.02 4