9 C922 3-4 Flute HSS-E-PM Roughing End Mill, Alcrona Coating Short cut length, 3 or 4 flute design with neck recess on big cutting diameter sizes and an HRA profile to break up the chips for efficient roughing application. A 35° helix reduces vibration and improves performance. Alcrona coating improves performance and extends the tool life. HSS-E HRA NOF PM 3-4 l g 35° 12° DC Alcrona k12 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 194. P2.2 P2.3 P3.1 P3.2 P3.3 P4.1 P4.2 P4.3 M1.1 M1.2 M2.1 M2.2 M3.1 M3.2 95 F 84 E 81 F 65 E 55 E 48 E 41 E 34 E 69 F 58 F 61 F 50 E 47 E 40 E M3.3 M4.1 K1.1 K1.2 K1.3 K2.1 K2.2 K2.3 K3.1 K3.2 K3.3 K4.1 K4.2 K4.3 36 D 25 D 60 F 44 F 33 F 111 F 90 F 72 E 98 F 75 F 61 E 91 E 68 E 50 E K4.4 K4.5 K5.1 K5.2 K5.3 N3.1 N3.2 S1.1 S1.2 S1.3 S2.1 S2.2 S3.1 S3.2 43 D 36 D 103 E 77 E 60 E 93 F 55 F 45 E 35 E 15 D 33 D 14 D 25 D 10 D S4.1 S4.2 20 D 8D DCON MS tolerance h6. Product DC DCON MS APMX OAL NOF LU DN [mm] [mm] [mm] [mm] [mm] [mm] C9226.0 6.00 6.00 13.00 57.0 3 – – C9227.0 7.00 10.00 16.00 66.0 3 – – C9228.0 8.00 10.00 19.00 69.0 3 – – C9229.0 9.00 10.00 19.00 69.0 3 – – C92210.0 10.00 10.00 22.00 72.0 3 31.50 9.50 C92211.0 11.00 12.00 22.00 79.0 3 – – C92212.0 12.00 12.00 26.00 83.0 3 37.50 11.50 C92213.0 13.00 12.00 26.00 83.0 3 37.50 11.50 C92214.0 14.00 12.00 26.00 83.0 3 37.50 11.50 C92215.0 15.00 12.00 26.00 83.0 3 37.50 11.50 C92216.0 16.00 16.00 32.00 92.0 3 43.50 15.50 C92218.0 18.00 16.00 32.00 92.0 3 43.50 15.50 C92220.0 20.00 20.00 38.00 104.0 3 53.50 19.50 C92222.0 22.00 20.00 38.00 104.0 3 53.50 19.50 C92224.0 24.00 25.00 45.00 121.0 4 64.50 23.50 C92225.0 25.00 25.00 45.00 121.0 4 64.50 24.50 C92228.0 28.00 25.00 45.00 121.0 4 64.50 24.50 C92232.0 32.00 32.00 53.00 133.0 4 72.50 31.50 156