SERIES 12J1R 0 DEGREE LEAD END MILL Shoulder Channel Ramping Corkscrew Pocket Facing Coolant L2 L1 L3 D1 D2 .50 L1 L2 L3 D2 D1 Extension Projection Overall Shank Number Ramp Cutter Number Nom. Dia. Length Length Length Size/Style of Inserts Angle 12J1R-0702084R01 0.750 2.00 1.75 4.00 .750" Cylindrical 1 8 12J1R-1001780R01 1.000 1.75 1.72 4.00 1.000" Cylindrical 3 7.9 12J1R-1003780R01 1.000 3.75 3.72 6.00 1.000" Cylindrical 3 7.9 12J1R-1202281R01 1.250 2.25 2.22 4.50 1.250" Weldon 4 5 12J1R-1502281R01 1.500 2.25 2.25 4.50 1.250" Weldon 4 3.5 Operating guidelines on 346. 32