GradeInsertExt. ToolholderInt. ToolholderThreadingGroovingMiniature toolMilling cutterEndmillDrilling toolTooling SystemUser's GuideIndex S TA N D A R D CUTTING CONDITIONS A ISO Workpiece material Grades Cutting speed Feed per tooth fzVc (m/min)(mm/t) Mild steels / Unhardened steels < 200HB GH330 150 - 200 0.3 - 0.4Carbon steels / Alloy steels < 300HBGH330150 - 2000.17 - 0.26B Die steels < 50HRC GH330 30 - 50 0.14 - 0.2 Stainless steels < 300HB GH330 150 - 200 0.05 - 0.12•Climb milling is recommended.•When threading a blind hole, use the right hand cutter in right-hand rotation. Cut up from the bottom to prevent chip recutting.C THREADING MILLS AND APPLICABLE THREADS D Applicable ThreadCutter dia.Thread typeCoarse screwthreadFine screw threadMinor diameter ofmax.pitch threadCoarse screwFine screwthreadthread D23 X 1 tooth M28T1-type of insertsM303.5M32 3 222 1.51.51.5 25.83526.21129.835 E M33 3.5 3 2 1.5 29.211 M35 1.5 33.376 D25 X 1 tooth M36 4T1-type of insertsM38M394 33 22 1.51.51.5 31.670 36.37634.670 F M40 3 2 1.5 36.752 M42 4.5 4 3 2 1.5 37.129 M45M48D38 X 2 teethM50 3 2 1.54321.5321.5 40.15243.67046.752 G T1-type of inserts M52 4 3 2 1.5 47.670 M55 4 3 2 1.5 50.670 M56M58M60 4 3 2 1.54321.54321.5 51.67053.67055.670 H D50 X 4 teeth M62 4 3 2 1.5 57.670 T1-type of inserts M64 4 3 2 1.5 59.670 M65 4 3 2 1.5 60.670 M68M64D55 X 4 teethT2-type of insertsM65 4 3 2 1.54321.54321.5 63.67059.67060.670 I M68 6 4 3 2 1.5 61.505 M70 4 3 2 1.5 63.505 M72M75D60 X 4 teethM76 6 4 3 2 1.54321.564321.5 65.50570.67069.505 J T2-type of inserts M78 2 75.835 M80 6 4 3 2 1.5 73.505 M82 2M856432D80 X 6 teethM906432 79.83578.50583.505 K T2-type of inserts M95 6 4 3 2 88.505 L M Tungaloy I127