9 P842 Rotary Burr - Ball Nosed Cone, Shape L AL single cut flute style - wide spaced edges for enlarging holes, rounding edges and surface finishing in tight narrow angles or other hard to reach areas. Carbide design for cutting diameter equal to 6 mm; above 6 mm carbide head with toughened and hardened steel shank. First choice for non-ferrous materials and plastics. Bright Workpiece material group suitability. Recommended operating speed (RPM) on page 229. N1.1 N1.2 N1.3 N2.1 N2.2 N2.3 N3.1 N3.2 N4.1 N4.2 N4.3 S1.1 DC=6.00 mm: DCON MS tolerance h6; DC>6.00 mm: Brazed on steel shank with DCON MS tolerance h7. Product DC DCON MS LU OAL PRFA [mm] [mm] [mm] [mm] [°] P8426.0X6.0 6.00 6.00 18.00 50.0 14 P8429.6X6.0 9.60 6.00 30.00 76.0 14 P84212.7X6.0 12.70 6.00 32.00 77.0 14 273