SERIES 5N6J 45 DEGREE LEAD FACE MILL Lead Angle Chamfer Ramping Facing D2 K H 45° D1 D3 .39 D1 D3 Effective Overall Number H D2 K Ramp Cutter Number Diameter Diameter of Inserts Height Bore Dia. Keyway Angle 5N6J-20R01 2.000 2.54 4 1.750 0.750 0.312 9.5 5N6J-30R01 3.000 3.54 6 1.750 1.000 0.375 5.5 5N6J-40R01 4.000 4.54 7 2.375 1.500 0.625 4.0 Operating guidelines on page 362. 188