Docu ment comprises 11 pagesDIN 509:2006-12 2 Foreword This standard has been prepared by the Normenausschuss Technische Grundlagen (NATG) (Fundamental Technical Standards Committee), Section 6 “Technical Product Documentation” , Technical Committee NA 152-06-05-AA “Technical Drawing” , with the cooperation of experts from the Normenausschuss Maschinenbau (NAM) and Normenausschuss Werkzeuge und Spannzeuge (FWS) (Mechanical Engineering, and Tools and Clamping Devices Standards Committees, respectively). Amendments This standard differs from DIN 509:1998-06 as follows: a) The title now includes the introductory element “Technical drawings” . b) The machining allowance symbol “z” has been replaced by the symbols “z1” and “z2” . c) In Figure 4 the machining allowances indicated are now the same size. d) In Figure 5 the dimensions “g” and “f” have been deleted. e) In Figure 6 the symbol for counterbore “a/2” has been changed to “a” . f) Figures 7, 8, 9 and 10 are in a different order. g) In clause 9, example 2 has been corrected to read “Undercut E 1,2 0,2” . h) In Figures 9 and 10 (formerly 7 and 8), Details “X” and “Y” , the tolerance “± 0,1” has been added to “R1,2” . i) In Figures 9 and 10 (formerly 7 and 8) the roughness data have been deleted. j) Table 1 has been rearranged. k) In Table 1 the values for radii are now preceded by an “R” . l) In Table 1 the value for dimension “f” for type G undercuts has been corrected to “0,9” . m) In Table 1 the value for dimension “f” for Undercut H 1,2 0,3 has been corrected to “2,4” . n) In Table 1 the value for dimension “t2” for Undercut F 4 0,5 is now included. o) In Table 1 the value for dimen...
