1、BRITISH STANDARD BS ISO 2351-2:2002 Assembly tools for screws and nuts Machine-operated screwdriver bits Part 2: Screwdriver bits for cross-recessed head screws ICS 25.140.01 BS ISO 2351-2:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strat
2、egy Committee, was published under the authority of the Standards Policy and Strategy Committee on 9 October 2002 BSI 9 October 2002 ISBN 0 580 40512 5 National foreword This British Standard reproduces verbatim ISO 2351-2:2002 and implements it as the UK national standard. The UK participation in i
3、ts preparation was entrusted to Technical Committee MTE/15/13, Assembly tools for screws and nuts, pliers and nippers, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which impl
4、ement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purpo
5、rt to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee
6、 any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and ii
7、i, a blank page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsINTERNATIONAL STANDARD ISO 2351-2 First edition 2002-08-01 Reference number I
8、SO 2351-2:2002(E) Assembly tools for screws and nuts Machine-operated screwdriver bits Part 2: Screwdriver bits for cross-recessed head screws Outils de manuvre pour vis et crous Embouts tournevis machine Partie 2: Embouts tournevis pour vis empreinte cruciformeBSISO23512:2002ISO -15322:2)E(200 ii I
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12、erdda es igvne olebw. ISO 2002 Ar llieser sthgrvsselnU .de torehceps esiwfi,dei rap ont iht fos bupliactim noarper eb yro decudo tuzilina ni dey from b roy nasnaem y, tcelernahcem ro cinoicla, inclidung tohppocoying m dnaicrfomli, tiwtuoh permini noiss wrtif gnirmo ietI rehSO ta tserdda eheb slow or
13、 SIsO memreb ydob in toc ehtnury fo tr ehtseuqeer. ISO copyrithg fofiec tsop esaCela 65 G 1121-HCeneva 02 T.le + 22 14 10 947 11 Fxa + 14 47 2290 9 74 E-liam cpoyrigthsio.ch Web wwwsi.oc.h BSISO23512:2002 iii Foreword ISO (the International Organization for Standardization) is a worldwide federation
14、 of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.
15、International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance wit
16、h the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn t
17、o the possibility that some of the elements of this part of ISO 2351 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 2351-2 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 10,
18、 Assembly tools for screws and nuts, pliers and nippers. ISO 2351 consists of the following parts, under the general 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 P
19、art 3: Screwdriver bits for hexagon socket screws BSISO23512:2002 ANRETNIITOTS LANDNADRA OSI -15322002:2)E(1 Assembly tools for screws and nuts Machine-operated screwdriver bits Part 2: Screwdriver bits for cross-recessed head screws 1 Scope This part of ISO 2351 prescribes the technical specificati
20、ons for machine-operated screwdriver bits for cross- recessed head screws. It applies to bits with male hexagon drive or with cylindrical flat end drive as defined in ISO 1173, and to tips for screwdrivers as defined in ISO 8764-1. It also gives recommended combinations between tips and bits. 2 Norm
21、ative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 2351. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based o
22、n this part of ISO 2351 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently vali
23、d International Standards. ISO 1173, Assembly tools for screws and nuts Drive ends for hand- and machine-operated screwdriver bits and connecting parts Dimensions, torque testing ISO 8764-1, Assembly tools for screws and nuts Screwdrivers for cross-recessed head screws Part 1: Driver points 3 Dimens
24、ions Figure 1 and Table 1 show the recommended combinations of screwdriver bits for cross-recessed head screws, forms PH and PZ in accordance with ISO 8764-1. The shape of the liaison between the tip and the driver end is at the discretion of the manufacturer. 4 Technical requirements The bits shall
25、 have a complete heat treatment. The technical specifications of bits are the same as those for screwdrivers in accordance with ISO 8764-1. 5 Torque test Torque testing will be carried out in accordance with ISO 8764-1. BSISO23512:2002 2 Key 1F o r m A 2F o r m C 3F o r m E 4F o r m G aPart (tip) in
26、 contact with the screw (in accordance with ISO 8764-1) b Driver end (in accordance with ISO 1173) Figure 1 Forms of screwdriver bits (PH and PZ) BSISO23512:2002 3 6 Designation A screwdriver bit in accordance with this part of ISO 2351 is designated by: a) “Bit“; b) reference to this part of ISO 23
27、51, i.e. ISO 2351-2; c) the form and the dimensions of the drive end (in accordance with ISO 1173); d) the form and number of the tips (in accordance with ISO 8764-1). EXAMPLE 1 A screwdriver bit form PH, tip size number2 (in accordance with ISO8764-1) with a drive end E 11,2 (in accordance with ISO
28、 1173) is designated as follows: Bit ISO 2351-2 E 11,2 PH 2 EXAMPLE 2 A screwdriver bit form PZ, tip size number2 (in accordance with ISO8764-1) with a drive end E11,2 (in accordance with ISO 1173) is designated as follows: Bit ISO 2351-2 E 11,2 PZ 2 7M a r k i n g Screwdriver bits in accordance wit
29、h this part of ISO 2351 shall be marked permanently and legibly with: a) the name of the manufacturer or supplier; b) the tip form PH or PZ and the number of the end. For male hexagons A 3 and C 4 the marking shall be given only on the smallest commonly used packaging unit. Table 1 Recommended combi
30、nations between tip and driver end Dimensions en millimetres PH or PZ tip size number (in accordance with ISO 8764-1) Male hexagon or cylindrical flat end of form and dimensions (in accordance with ISO 1173) A 3 A 5,5 C 4 C 6,3 C 8 E 6,3 E 8 E 11,2 G 7 50 50 28 25 32 40 50 32 40 50 70 89 152 53 75 5
31、3 70 0 1 2 3 4 l 1 2 BSISO23512:2002 4 Bibliography 1 ISO 1703, Assembly tools for screws and nuts Nomenclature 2 ISO 2351-1, Assembly tools for screws and nuts Machine-operated screwdriver bits Part 1: Screwdriver bits for slotted head screws 3 ISO 2351-3, Assembly tools for screws and nuts Machine
32、-operated screwdriver bits Part 3: Screwdriver bits for hexagon socket screws BSISO23512:2002 BS ISO 2351-2:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on sta
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