1、August 2015 Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、25.140.01!%E:“2342923www.din.deDDIN ISO 2351-3Assembly tools for screws and nuts Machine-operated screwdriver bits Part 3: Screwdriver bits for hexagon socket screws (ISO 2351-3:2014),English translation of DIN ISO 2351-3:2015-08Schraubwerkzeuge Maschinenbettigte Schraubendrehereinstze Teil 3: Schra
3、ubendrehereinstze fr Schrauben mit Innensechskant (ISO 2351-3:2014),Englische bersetzung von DIN ISO 2351-3:2015-08Outils de manoeuvre pour vis et crous Embouts tournevis machine Partie 3: Embouts tournevis pour vis six pans creux (ISO 2351-3:2014),Traduction anglaise de DIN ISO 2351-3:2015-08Supers
4、edesDIN ISO 2351-3:2006-01www.beuth.deDocument comprises 9 pagesIn case of doubt, the German-language original shall be considered authoritative.08.15 A comma is used as the decimal marker. Contents PageNational foreword 31 Scope . 52 Normative references 53 Dimensions . 54 Technical requirements 75
5、 Torque test 76 Designation 87 Marking 8Bibliography 9DIN ISO 2351-3:2015-08 2National Annex NA (informative) Bibliography4National foreword This document (ISO 2351-3:2014) has been prepared by Technical Committee ISO/TC 29 “Small tools”, Subcommittee SC 10 “Assembly tools for screws and nuts, plier
6、s and nippers”. The responsible German body involved in its preparation was the DIN-Normenausschuss Werkzeuge und Spannzeuge (DIN Standards Committee Tools and Clamping Devices), Working Committee NA 121-05-01 AA Schraubwerkzeuge, Fgewerkzeuge. ISO 2351 consists of the following parts, under the gen
7、eral title Assembly tools for screws and nuts Machine-operated screwdriver bits: Part 1: Screwdriver bits for slotted head screws Part 2: Screwdriver bits for cross-recessed head screws Part 3: Screwdriver bits for hexagon socket screws Attention is drawn to the possibility that some of the elements
8、 of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 1173 DIN ISO 1173 ISO 1703 DIN 898 ISO 29
9、36 DIN ISO 2936 Amendments This standard differs from DIN ISO 2351-3:2006-01 as follows: a) the designation according to ISO 1703 has been included; b) normative references have been updated; c) minimum proof torque values in Table 2 have been corrected; d) relation of minimum proof torque and Md IS
10、O 2936 in Table 2 has been defined exactly. Previous editions DIN 7426: 1969-05, 1982-03, 1987-02, 1995-01 DIN ISO 2351-3: 2006-01 DIN ISO 2351-3:2015-08 3 National Annex NA (informative) Bibliography DIN 898, Assembly tools for screws and nuts Designation and nomenclature DIN ISO 1173, Assembly too
11、ls for screws and nuts Drive ends for hand- and machine-operated screwdriver bits and connecting parts Dimensions, torque testing DIN ISO 2936, Assembly tools for screws and nuts Hexagon socket screw keys DIN ISO 2351-3:2015-08 4 Assembly tools for screws and nuts Machine-operated screwdriver bits P
12、art 3: Screwdriver bits for hexagon socket screws1 ScopeThis part of ISO 2351 prescribes the technical specifications for machine-operated screwdriver bits for hexagon socket screws, listed in ISO 1703 under reference number 3 2 03 01 0. It applies to bits with male hexagon drive or with cylindrical
13、 flat-end drive as defined in ISO 1173 and to tips for screwdrivers as defined in ISO 2936. It also gives recommended combinations between tips and bits.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its appli
14、cation. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1173, Assembly tools for screws and nuts Drive ends for hand- and machine-operated screwdriver bits and connecting parts Dimensio
15、ns, torque testingISO 2936, Assembly tools for screws and nuts Hexagon socket screw keys3 DimensionsFigure 1 and Table 1 show the recommended combinations of screwdriver bits for hexagon socket screws.The shape of the liaison between the tip and the driver end is at the discretion of the manufacture
16、r.DIN ISO 2351-3:2015-08 5 Key1 Form A2 Form C3 Form E4 Form GaPart in contact with the screw (in accordance with ISO 2936).bDriver end (in accordance with ISO 1173).Figure 1 Screwdriver bitsDIN ISO 2351-3:2015-08 6 Table 1 Recommended combinations between tip and driver endNominal width across flat
17、 s (in accordance with ISO 2936)l2min mmNominal male hexagon or cylindrical flat end of form (in accordance with ISO 1173)A 3 A 5,5 C 4 C 6,3 C 8 C 12,5 E 6,3 E 8 E 11,2 G 7l1 2 mm45 50 28 25 30 50 50 50 55 630,7 1,7 X X0,9 1,9 X X1,3 2,3 X X1,5 2,3 X X X X2 3 X X X X X2,5 3,8 X X X X X X3 4,5 X X X
18、 X X X X X X4 6 X X X X X X X5 7,5 X X X X X X X6 9 X X X X X X7 10,5 X X X X8 12 X X X X10 16 X X12 18 X4 Technical requirementsThe bits must have a complete heat treatment.The technical specifications of bits are the same as those for screwdrivers in accordance with ISO 2936.5 Torque testThe drive
19、 end shall be fully engaged in a female holder in accordance with ISO 1173. The drive end shall be inserted in a test socket adapter with a minimum hardness of 62 HRC as used for hexagon socket screw keys in accordance with ISO 2936.The test force shall be applied smoothly until the minimum torque v
20、alue given in Table 2 is reached or until the tool fractures or deforms before this torque value is reached.Following the application of the minimum test torque, any resulting damage or deformation shall not affect the usability of the tool.DIN ISO 2351-3:2015-08 7 Table 2 Torque testNominal width a
21、cross flats sMinimum Rockwell hardness of bitsMinimum proof torqueaMdN m0,756 HRC0,10,9 0,21,3 0,61,5 1,02 2,22,5 4,43 7,74 195 356 607 938 13910 25512 429aMinimum proof torque = 1,16 MdISO 2936.6 DesignationA screwdriver bit according to this part of ISO 2351 is designated by the following:a) “Bit”
22、;b) a reference to this part of ISO 2351 (i.e. ISO 2351-3);c) the form and nominal dimensions of the drive end (in accordance with ISO 1173);d) the nominal width across the flats of the tip, s (in accordance with ISO 2936).EXAMPLE A screwdriver bit for hexagon socket screws with a drive end E 11,2 (
23、in accordance with ISO 1173) and a nominal width across the flats of the tip, s, (in accordance with ISO 2936) of 6 is designated as follows:Bit ISO 2351-3 E 11,2 - 67 MarkingScrewdriver bits in accordance with this part of ISO 2351 shall be marked permanently and legibly witha) the name of the manu
24、facturer or suppliers, andb) the nominal width across flat, s.For male hexagons A 3 and C 4, the marking shall be given only on the smallest commonly used packaging unit.DIN ISO 2351-3:2015-08 8 Bibliography1 ISO 1703, Assembly tools for screws and nuts Designation and nomenclatureDIN ISO 2351-3:2015-08 9
