9 Material code (BMC) HRA Mill Profile N N N N N N N N N N N N NOF NOF NOF NOF NOF NOF NOF NOF NOF NOF NOF NOF NOF Number of flutes (NOF) 6-8 2 2 2 4= 4= 4= 4 4 4 6-8 6-8 6-8 Cut length l l l l l l l l l l l l l Flute Helix (FHA) 50° 30° 30° 30° 40° 40° 40° 45° 40° 40° 50° 50° 50° g g g g g g g g g g g g g Radial rake angle (GAMF) 3° 3° 3° 3° 4° 4° 4° -10° -6° -6° -26° -26° -26° Shank DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA DIN 6535HA Coating AlTiN TiSiN TiSiN TiSiN AlCrN AlCrN AlCrN TiSiN TiSiN TiSiN TiSiN TiSiN TiSiN Cutting diameter tolerance DC DC DC DC DC DC DC DC DC DC DC DC DC class (TCDC) h9 h9 h9 h9 h9 h9 h9 h9 h9 h9 h9 h9 h9 Direction Basic standard group (BSG) Cooling (CSP) Product Family Code S227 S229 S231 S233 S260 S262 S264 S521 S523 S524 S525 S526 S527 6.00 - 20.00 1.50 - 16.00 1.50 - 16.00 2.00 - 16.00 3.00 - 20.00 3.00 - 20.00 6.00 - 20.00 3.00 - 16.00 1.50 - 16.00 3.00 - 16.00 3.00 - 20.00 3.00 - 20.00 3.00 - 20.00 & 56 & 57 & 58 & 59 & 60 & 61 & 63 & 64 & 65 & 67 & 68 & 69 & 70 P1 P2 P P3 P4 M1 M2 M M3 M4 K1 K2 K K3 K4 K5 N1 N2 N N3 N4 N5 S1 S2 S S3 S4 H1 H2 H H3 H4 Primary use Possible use 24