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1、BRITISH STANDARD BS 7568-30: 1993 ISO 9448-9: 1992 Press tools Part 30: Specification for guide bushes: form B, ball cage bushes, plain, type 2 UDC 621.979.07 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
2、7568-30:1993 This British Standard, having been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 November 1993 BSI 10-1999 The following BSI references relate to the
3、work on this standard: Committee reference MTE/12 Draft for comment 91/73259 DC ISBN 0 580 22358 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committe
4、e MTE/12, upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute Amalgamated Engineering Union Gauge and Tool Makers Association Coopted member Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London
5、 South Bank University, Fri Dec 08 11:39:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-30:1993 BSI 10-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Dimensions1 3Material and corresponding hardness1 4Designation1 Annex A (informative) BibliographyIn
6、side back cover Figure 11 Table 12 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-30:1993 ii BSI 10-1999 National foreword This Part of BS 7568 has been prepared under the direction of the Machine, Eng
7、ineers and Hand Tools Standards Policy Committee. It is identical with ISO 9448-9:1992 Tools for pressing Guide bushes Part 9: Form B, ball cage bushes, plain, type 2, published by the International Organization for Standardization (ISO). A British Standard does not purport to include all the necess
8、ary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1
9、 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08
10、11:39:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-30:1993 BSI 10-19991 1 Scope This part of ISO 9448 specifies the main dimensions and tolerances, in millimetres, of guide bushes of form B, plain ball cage bushes, type 2, intended for use in press tools and to be mounted in the clamp plate
11、 by means of interference fit. It gives guidance on the materials, and specifies the hardness and the designation of bushes in accordance with this part of ISO 9448. 2 Dimensions See Figure 1 and Table 1. Details not stated, such as chamfers, radii, lubrication grooves, etc., are left to the manufac
12、turers discretion. 3 Material and corresponding hardness The material is left to the manufacturers discretion and the hardness shall be 60HRC. 4 Designation A guide bush in accordance with this part of ISO 9448 shall be designated by a) “Guide bush”; b) a reference to this part of ISO 9448; c) its f
13、orm; d) its guiding diameter, D1, in millimetres; e) its length, l1, in millimetres. EXAMPLE A guide bush of form B, plain ball cage bush, type 2, of guiding diameter D1= 25 mm and of length l1= 50 mm is designated as follows: Guide bush ISO 9448-9 B 25 50 +2 0 Figure 1 Licensed Copy: London South B
14、ank University, London South Bank University, Fri Dec 08 11:39:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-30:1993 2 BSI 10-1999 Table 1 D1 l1 253240506380100 D2 n6 nom.tol.4050638090112140 50XX 63XXX 80XXXX 100XXXX 125XXXX 160XXXX 200XXX 250XX NOTEX, standardized dimension. 3 4 3 5 Licens
15、ed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-30:1993 BSI 10-1999 Annex A (informative) Bibliography 1 ISO 6508:1986, Metallic materials Hardness test Rockwell test (scales A B C D E F G H K). 2 ISO 9448-1:
16、1991, Tools for pressing Guide bushes Part 1: Forms. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-30: 1993 ISO 9448-9: 1992 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution
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