BS-7425-3-1993 ISO-9138-1993.pdf
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1、BRITISH STANDARD BS 7425-3: 1993 ISO 9138:1993 Abrasive grains Part 3: Method for sampling and splitting UDC 621.921:620.11 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:39:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7425-3:1993 This British Standard,
2、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 August 1993 BSI 12-1999 The following BSI references relate to the work on this standard: Committee refer
3、ence MTE/3 Draft for comment 88/75335 DC ISBN 0 580 22205 5 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 Committee MTE/3, upon which the following bodie
4、s were represented: Abrasive Industries Association Advanced Manufacturing Technology Research Institute British Paper and Board Industry Federation Coated Abrasives Manufacturers Association Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London
5、 South Bank University, Fri Dec 08 11:39:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7425-3:1993 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Apparatus1 4Procedure1 List of referencesInside back cover Licensed Copy: Lond
6、on South Bank University, London South Bank University, Fri Dec 08 11:39:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7425-3:1993 ii BSI 12-1999 National foreword This Part of BS 7425 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee. It is
7、 identical with ISO 9138:1993 Abrasive grains Sampling and splitting prepared by Technical Committee ISO/TC29 Small tools, Subcommittee SC5, Grinding wheels and abrasives, and published by the International Organization for Standardization (ISO). ISO 9138 was produced as a result of international di
8、scussion in which the United Kingdom took an active part. Cross-references The Technical Committee has reviewed the provisions of the draft ISO standards ISO 6344-1 and ISO 8486:1986, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction wi
9、th this standard. It is intended to implement all three Parts of ISO 6344 as British Standards once they have been published. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Complianc
10、e 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 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have h
11、ad 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 11:39:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7425-3:1993 BSI 12-19991 1 Scope This International Standa
12、rd specifies a method for the sampling and splitting of a lot of abrasive grains. This method may be used in the comparative testing of uniformly produced abrasive grains. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions o
13、f this part of ISO 9138. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 9138 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
14、 Members of IEC and ISO maintain registers of currently valid International Standards. ISO 6344-1:, Coated abrasives Grain size analysis Part 1: Definitions, designation and principle1). ISO 8486:1986, Bonded abrasives Grain size analysis Designation and determination of grain size distribution of m
15、acrogrits F4 to F220. 3 Apparatus 3.1 Sampling thief The sampling thief is made from seamless steel tubing of inside diameter approximately 25 mm and length approximately 800 mm. The tube is pointed at one end and has a “T” handle at the other end. Holes are bored in a straight line, lengthwise alon
16、g the tube, and spaced at 50 mm intervals. The diameter of the holes is determined by the size of particles to be sampled and should be approximately three times the size of the largest particle. However, it is usually sufficient to use holes 10 mm in diameter for grains designated F20, P20 and fine
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