9 S264 4-Flute Solid Carbide Roughing End Mill Short cut length, 4-flute with HRA profile to break-up the chips for efficient roughing applications. AlCrN coating improves performance and and extends the tool life when milling difficult to machine materials. The 40° helix with differential pitch reduces vibrations and maximizes productivity and tool life. HRA NOF 4= l g 40° 4° DC AlCrN h9 Workpiece material group suitability, starting values for cutting speed (m/min) and Alpha Code. Tables with feed per tooth and correction factors can be found starting from page 112. P4.3 M2.3 M3.3 M4.1 M4.2 S1.3 S2.2 S3.2 S4.2 H1.1 H2.1 H3.1 H3.2 97 J 97 J 99 I 97 I 83 I 70 I 56 I 40 I 32 I 179 I 106 G 118 G 97 G DCON MS tolerance h6; CHW ± 0.02X45° mm. Product DC CHW DCON MS APMX OAL NOF [mm] [mm] [mm] [mm] [mm] S2646.0 6.00 0.10 6.00 13.00 57.0 4 S2648.0 8.00 0.20 8.00 20.00 64.0 4 S26410.0 10.00 0.20 10.00 22.00 72.0 4 S26412.0 12.00 0.20 12.00 26.00 83.0 4 S26414.0 14.00 0.30 14.00 26.00 83.0 4 S26416.0 16.00 0.30 16.00 32.00 92.0 4 S26418.0 18.00 0.30 18.00 32.00 92.0 4 S26420.0 20.00 0.40 20.00 38.00 104.0 4 63