The Kemmler-numerical code Example: 40  3 . 02 . 20 .1 Cone Design Diameter Length SK 30 = 30 1 = DIN 2080 SK 40 = 40 Type SK 50 = 50 2 = DIN 69871 A – AD 01 = OZ-system 3 = DIN 69871 AD/B 02 = ER-system VDI . 03 = KPS-system . 5 = JIS B 6339 A – AD 04 = Weldon . 6 = JIS B 6339 AD/B 05 = Whistle Notch VDI 30 = 30 . 9 = VDI 06 = Milling arbors for screw in cutters . 07 = Adaptor sleeves DIN 6383 . 08 = Adaptor sleeves DIN 6364 09 = Adaptor sleeves for SK HSK . 10 = Combi shell mill holders . 11 = Shell mill holders . 14 = Drill chuck adaptors DIN 238 A63 = A63 15 = CNC-drill chucks . . 16 = Quick change tapping chucks . 17 = Boring bar blanks 18 = Test arbors . 20 = Pull studs . . 61 = OZ without drive slots 62 = ER without drive slots 64 = Milling chuck 70 = Shrink fi t chucks H = Hydraulic chucks 13 13.51 KEMMLER