Helical Mills Helical Mills • M390 Series Integral • SD1204.. • Four cutting edges per insert. • Replaceable end cap. • Positive helix for high productivity. Integral CSMS coolant order number catalogue number D1 L L1 L2 Ap1 max Z ZU system size max RPM supply kg 2021422 12393041200 50 207 105 82 64,0 18 3 DV50 14000 Yes 3,4 2021423 12393041400 63 232 130 107 85,0 32 4 DV50 12000 Yes 4,3 2021424 12393041800 80 262 160 137 117,0 55 5 DV50 10500 Yes 6,3 NOTE: Z = number of pocket seats. ZU = number of effective teeth. Spare Parts insert Torx end socket-head D1 screw Nm wrench cap cap screw 50 12148037700 4,0 12148000600 12393051200 12147625400 63 12148037700 4,0 12148000600 12393051400 12148783700 80 12148037700 4,0 12148000600 12393051800 12148783700 K4 widia.com