E251 DRILL BUSH WITHOUT COLLAR, DIN 179 SHAPE A d2 n6 d1 F7 l 1 277. Sarting Lead Material: Case hardened steel Hardness 740 ± 40 HV 10 Execution: Diameters d1 and d2 precision ground. Other diameters and lengths on request. d1 d2 Gradation l1 6 8 9 10 12 16 20 25 28 30 36 45 56 67 0,9 - 1 3 0.1 ● ● 1,1 - 1,8 4 0.1 ● ● 1,9 - 2,6 5 0.1 ● ● 2,7 - 3,3 6 0.1 ● ● ● 3,4 - 4 7 0.1 ● ● ● 4,1 - 5 8 0.1 ● ● ● 5,1 - 6 10 0.1 ● ● ● 6,1 - 8 12 0.1 ● ● ● 8,1 - 10 15 0.1 ● ● ● 10,1 - 12 18 0.1 ● ● ● 12,1 - 15 22 0.1 ● ● ● 15,5 - 18 26 0.5 ● ● ● 18,5 - 22 30 0.5 ● ● ● 22,5 - 26 35 0.5 ● ● ● 26,5 - 30 42 0.5 ● ● ● 30,5 - 35 48 0.5 ● ● ● 35,5 - 42 55 0.5 ● ● ● 42,5 - 48 62 0.5 ● ● ● 277. Drill bush without collar, DIN 179 Shape A Ordering Code (example): Drill bush without collar, DIN 179 Shape A = 277.1. Diameter of conduit d1 12.1 mm = 1210. Length l1 16 mm = 016 Order No = 277.1. 1210.016
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