DEUTSCHENORM December2006 DIN ICS 01.100.20; 25.020 Supersedes DIN 509:1998-06 Technical drawings - Undercuts -- Types and dimensions TechnischeZeichnungen- Freistiche Formen, MaβBe Documentcomprises11pages Translation by DIN-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text. No part of this translation may be reproduced without prior permission of English price group 9 has the exclusive right of sale for German Standards (DIN-Normen). www.din.de www.beuth.de 1392335 DIN 509:2006-12 Foreword Technical Standards Committee), Section 6"Technical Product Documentation", Technical Committee NA152-06-05-AA “Technical Drawing",with the cooperation of experts from the Normenausschuss Maschinenbau (NAM)and Normenausschuss Werkzeuge und Spannzeuge(FWS)(MechanicalEngineering, 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 b) The machining allowance symbol"z" has been replaced by the symbols "z1" and "z2" C) In Figure 4 the machining allowances indicated are now the same size d) In Figure 5 the dimensionsg" and"f" have been deleted. e) In Figure 6 the symbol for counterbore“al2"has been changed to"a". f) Figures 7, 8, 9 and 10 are in a different order. In clause9, example2 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) InTable1thevaluesforradii arenowprecededbyanR". 1) InTable 1the valuefordimension"f"fortype G undercutshas been correctedto"o,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) I In Table 1 the value for dimension "g" for Undercut G 0,4 × 0,2 has been corrected to "1,1". In Table 2 dimensions “e" and"e2" are now included in one column for type H undercuts, as they are equally long. q)Table 2 has been rearranged. r) In Table 3 the values for dimension “a" have been divided in half and re-calculated (s In clause5surface roughness specifications havebeenbrought in linewithDIN ENiSO1302. t) In clause 6 the second example now includes the designation"MRR"("material removal required")in accordance withDIN ENISO1302. 2 DIN509:2006-12 (n Clause 9 now makes reference to the preferred type of line for drawings, as well as to the fact that the designation is tobegiven in conjunction with a leader line and a reference line. v) Referenceshavebeenupdated w)The standard has been editorially revised. Previous editions DIN509:1956-04,1966-01,1966,08,1998-06 Foreword Forms and dimensions of type G and H undercuts conform to those for indexable inserts as in DiN ISO 6987 this standard Although Figures 1 to 6 show undercuts for shafts and axles, the numerical values specified here also apply to bores by analogy. AllradispecifiedinthisstandardareinaccordancewithDiN250 Scope This standard applies to undercuts on turned parts and in bores, and helps reduce the variety of tools needed toproducesuchundercuts. 2 Normativereferences The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (includinganyamendments)applies. DIN ENISO 1302, Geometrical Product Specifications (GPS)- Indication of surface texture in technical product documentation DiNisO128-22,Technicaldrawings-General principlesof presentation-Part22:Basicconventionsand applicationsforleaderlinesandreference lines DIN IsO 128-24, Technical drawings General principles of presentation Part 24: Lines on mechanical engineering drawings 3