SERIES TN1N 45 DEGREE LEAD FACEMILL WITH 4 INDEXES Lead Angle Chamfer Facing Coolant D2 K H 45° .31 D1 D3 D1 D3 Nominal Overall Number D2 H K Cutter Number Diameter Diameter of Inserts Bore Dia. Height Keyway TN1N-20R01 2.000 2.68 4 0.750 1.750 0.312 TN1N-30R01 3.000 3.68 5 1.000 1.750 0.375 TN1N-30R02 3.000 3.68 7 1.000 1.750 0.375 TN1N-40R01 4.000 4.67 6 1.500 2.375 0.625 TN1N-40R02 4.000 4.67 8 1.500 2.375 0.625 TN1N-60R01 6.000 6.67 10 1.500 2.375 0.625 Operating Guidelines on page 97. 62