XX EE H 00 5 6 7 8 5 6 7 8 CUTTING LENGTH OR TOOL HEIGHT ADAPTION CODE ROTATING DIRECTION STANDARD OR SPECIAL TOOLS 2-digit number 70 0.750 Weldon R R.H. mills A 0°–25° e. g. cutting length 71 0.312 Weldon pos. helical angle .75" = 07 77 0.375 Weldon L L.H. mills 1.25" = 12 78 .0500 Weldon B 26°–34° 79 0.625 Weldon pos. helical angle–neutral (R.H./L.H.) 80 1.000 Weldon 81 1.250 Weldon C 35°–44° 82 2.000 Weldon pos. helical angle 83 2.500 Weldon 84 0.750 Weldon D pos. helical angle > 45° 85 0.875 Weldon 86 1.500 Weldon N > 45° pos. helical angle R4 0.125 Straight Shank with chip breaker resp. R5 0.187 Straight Shank neutral slot mill R6 0.250 Straight Shank R7 0.312 Straight Shank Q HPC divers spacing R8 0.375 Straight Shank R9 0.437 Straight Shank U 45° roughing and finishing S1 1.000 Straight Shank S2 2.000 Straight Shank S3 2.500 Straight Shank S4 0.500 Straight Shank S5 1.500 Straight Shank S6 0.625 Straight Shank S7 0.750 Straight Shank S8 0.875 Straight Shank S9 1.250 Straight Shank TQ T05 Chip Sufer T6 T06 Chip Sufer T8 T08 Chip Sufer TR T10 Chip Sufer TS T12 Chip Sufer TU T15 Chip Sufer Subject to technical changes 451