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1、BRITISH STANDARD BS ISO 8486-1:1996 Implementation of ISO 8486-1:1996 Bonded abrasives Determination and designation of grain size distribution Part 1: Macrogrits F4 to F220 ICS 25.100.70 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IS
2、O 8486-1:1996 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 March 1997 BSI 12-1998 The following BSI references relate to the work on this standard: Committee refer
3、ence MTE/13 Draft for comment 93/712506 DC ISBN 0 580 27038 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee MTE/13, Grinding wheels, abrasive tools, papers and cloths and powders, upon which the following bodies were re
4、presented: Abrasive Industries Association (AIA) Advanced Manufacturing Technology Research Institute (AMTRI) British Abrasives Federation (BAF) British Iron and Steel Producers Association (BISPA) Coated Abrasives Manufacturers Association (CAMA) Diamond Industrial Products Association (DIPA) Healt
5、h and Safety Executive (HSE) Hire Association Europe (HAE) Paper Federation of Great Britain (PFGB) Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8486-1:1996 BSI 12-1998i Cont
6、ents Page Committees responsibleInside front cover National forewordii Forewordiii Text of ISO 8486-11 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8486-1:1996 ii BSI 12-1998 National foreword This British Standard reproduces verba
7、tim ISO 8486-1:1996 and implements it as the UK national standard. This British Standard is published under the direction of the Engineering Sector Board whose Technical Committee MTE/13 has the responsibility to: aid enquirers to understand the text; present to the responsible international committ
8、ee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389
9、Chiswick High Road, London W4 4AL. 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. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summar
10、y of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 4, 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 th
11、e amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8486-1:1996 ii BSI 12-1998 Content
12、s Page 1Scope1 2Normative references1 3Definitions1 4Grain size distribution testing1 5Standard grading limits2 6Designation2 Annex A (informative) BibliographyInside back cover Table 1 Series test sieves Aperture sizes1 Table 2 Size distribution of macrogrits F4 to F2203 Table 3 Permissible deviati
13、on as a result of variations in the measuring technique4 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8486-1:1996 BSI 12-1998iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of nationa
14、l 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. Internation
15、al 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. Draft International Standards adopted by the technical committee
16、s 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. International Standard ISO 8486-1 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 5, Grinding wheels and abra
17、sives. This first edition of ISO 8486-1 cancels and replaces ISO 8486:1986, which has been technically revised. ISO 8486 consists of the following parts, under the general title Bonded abrasives Determination and designation of grain size distribution: Part 1: Macrogrits F4 to F220 Part 2: Microgrit
18、s F230 to F1200 Annex A of this part of ISO 8486 is for information only. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
19、ISO 8486-1:1996 BSI 12-19981 1 Scope This part of ISO 8486 sets forth a method for determining or checking the size distribution of macrogrits from F4 to F220 in fused aluminium oxide and silicon carbide. It specifies the grit designation for the testing of those grits used in the manufacture of bon
20、ded abrasive products and general industrial applications and those removed from bonded products. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 8486. At the time of publication, the editions indicate
21、d were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 8486 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid Internationa
22、l Standards. ISO 3310-1:1990, Test sieves Technical requirements and testing Part 1: Test sieves of metal wire cloth. ISO 9138:1993, Abrasive grains Sampling and splitting. ISO 9284:1992, Abrasive grains Test-sieving machines. 3 Definitions For the purposes of this part of ISO 8486 the following def
23、initions apply. 3.1 abrasive grain synthetic particulate substance manufactured by crushing and classified into specific grit sizes used for the removal of surplus material by grinding, polishing, lapping, etc. 3.2 grain size distribution the percentage of individually sized particles contained in t
24、he designated grit sizes 4 Grain size distribution testing 4.1 Equipment 4.1.1 Sieving machine, in accordance with ISO 9284. 4.1.2 Sieves having the aperture sizes indicated in Table 1, in accordance with ISO 3310-1. Test sieves are designated by their aperture size in micrometres if the aperture is
25、 less that 1 mm and in millimetres if it is equal to or greater than 1 mm. 4.1.3 Balance accurate to 0,1 g. 4.1.4 Timer able to operate for 5 min, with an accuracy of at least 5 s. Table 1 Series test sieves Aperture sizes Nominal sizes and tolerances of aperture sizes mmm 8 0,25 6,7 0,21 5,6 0,18 4
26、,75 0,15 4 0,13 3,35 0,11 2,8 0,09 2,36 0,08 2 0,07 1,7 0,06 1,4 0,05 1,18 0,04 1 0,033 850 29 710 25 600 21 500 18 425 16 355 13 300 12 250 9,9 212 8,7 180 7,6 150 6,6 125 5,8 106 5,2 90 4,6 75 4,1 63 3,7 53 3,4 45 3,1 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006,
27、Uncontrolled Copy, (c) BSI BS ISO 8486-1:1996 2 BSI 12-1998 4.2 Procedure 4.2.1 Sample Take 100 g of grits to be tested from a statistically representative sample in accordance with ISO 9138. The sample to be tested must be dry. Failing this, it must be dried at a temperature of 105 C until constant
28、 weight is reached. 4.2.2 Arrangement of test sieves Assemble the desired nest of sieves (4.1.2) used for testing each grit category (see Table 2) in order of mesh size with the coarsest sieve on the top, progressing to the finest with a pan on the bottom. Pour the test sample on to the coarsest tes
29、t sieve, place a cover on the top sieve, and place the entire unit in the sieving machine (4.1.1) with a receiver. 4.2.3 Sieving Set the timer (4.1.4) controlling the sieving machine and switch on. After sieving is completed, the grit retained on the sieves and in the bottom pan is transferred to a
30、balance (4.1.3) pan and weighed separately beginning with the residue on the coarsest test sieve. 5 Standard grading limits 5.1 Standard grit sizes of fused aluminium oxide and silicon carbide abrasives Table 2 lists the permissible grading limits for the sizing of fused aluminium oxide and silicon
31、carbide abrasive grain for use in bonded abrasive products and other loose grain applications. 5.2 Interpretation of the sieving test results The sample is in accordance with this part of ISO 8486 when the values for the residue on the different sieves are within the permissible limits given in Tabl
32、e 2. The residue on test sieve 1 corresponds exclusively to 100 g of the tested material in accordance with 4.2.1. When checking the measured results, allowance must be made for the variations due to the measuring technique. These permissible deviations, given in Table 3, have been determined on the
33、 basis of the standard deviations resulting from a cooperative test carried out by ISO. The tolerances for production macrogrits given in Table 2, are to be increased by these values. 5.3 Example of use of Table 2 and Table 3 The following is an example of the use of this part of ISO 8486 for an F10
34、 macrogrit: Taking grit F10, all material shall pass through the coarsest sieve (in this case sieve aperture 3,35 mm). All material may pass through the next coarsest sieve (aperture 2,36 mm), but not more than 20 % may be retained on it. At least 45 % of the sample shall be retained on the sieve ap
35、erture 2 mm but it is permissible to have 100 % pass through sieve aperture 2,36 mm and remain on sieve aperture 2 mm. The total grit passing through sieve aperture 2,36 mm and retained on sieve aperture 2 mm and sieve aperture 1,7 mm shall add up to at least 70 %. Consequently, if 45 % was retained
36、 on sieve aperture 2 mm, then at least 25 % shall be retained on the sieve aperture 1,7 mm. There is no requirement for material retained on the finest sieve, in this case the sieve aperture 1,4 mm, but not more than 3 % is permitted to pass through the sieve aperture 1,4 mm. It is easy to determine
37、 from this example the procedure to be followed for each grain size in the table. The post delivery testing of the grit F10 should include the variations shown in Table 3. In the case of test sieve 2 it means that the 20 % value increases to 24 % according to Table 3 (plus 4 %). 6 Designation The de
38、signation of macrogrits for fused aluminium oxide or silicon carbide complying with the requirements of this part of ISO 8486 shall comprise a) the type of abrasive; b) the designation of the grit including the letter “F” for a bonded abrasive followed by a characteristic number representing the gri
39、t size. EXAMPLE Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8486-1:1996 BSI 12-19983 Table 2 Size distribution of macrogrits F4 to F220 Grit designation Test sieves Remainder in the bottom pan 1233 and 43, 4 and 5 Aperture size si
40、eve 1 ResidueAperture size sieve 2 ResidueAperture size sieve 3 ResidueAperture size sieve 4 Sum of the residues Aperture size sieve 5 Sum of the residues w1Q1w2Q2w3Q3w4Q3 + Q4w5Q3 + Q4 + Q5 Q max.min.min.min.max. mmm%mmm%mmm%mmm%mmm% F48 0 5,6 20 4,75 40 4 70 3,35 a 3 F56,74,7543,352,8 F65,643,352,
41、82,36 F74,753,352,82,362 F84 0 2,8 20 2,36 45 2 70 1,7 a 3 F103,352,3621,71,4 F122,821,71,41,18 F142,361,71,41,181 F162 0 1,4 20 1,18 45 1 70 850 a 3 F201,71,181850710 F221,41 850710600 F241,188502571060085500 F301 0 710 25 600 45 500 65 425 a 3 F36 850600500425355 F40710500 30 425 40 355300 F466004
42、25355300250 F54 500 0 355 30 300 40 250 65 212 a 3 F60425300250212180 F70355250 25 212180150 F80300212180150125 F90 250 0 180 20 150 40 125 65 106 a 3 F10021215012510675 F1201801251069063 F15015010615756345 F180 125 0 90 15 75 a 63 40 5365 a F2201067563534560 aNot specified. Licensed Copy: sheffield
43、un sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8486-1:1996 4 BSI 12-1998 Table 3 Permissible deviation as a result of variations in the measuring technique Grit designation Test sieve No. Remainder of grit in the bottom pan % 1233 and 43, 4 and 5 Permissibl
44、e deviation % F4 0+ 4 4 4 F5 F6 F7 F8 0+ 4 4 4 F10 F12 F14 F16 0+ 4 4 4 F20 F22 F24 F30 0+ 4 4 4 F36 F40 F46 F54 0+ 4 4 4 F60 F70 0+ 3 3 3 F80 F90 0+ 3 3 3 F100 F120 F150 F180 0+ 3 3 3 3 F220 NOTEPercentages are of original sample mass. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19
45、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 8486-1:1996 BSI 12-1998 Annex A (informative) Bibliography 1 ISO 565:1990, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet Nominal sizes of openings. 2 ISO 8486-2:1996, Bonded abrasives Determination and designation of g
46、rain size distribution Part 2: Microgrits F230 to F1200. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
47、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view o
48、n standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the q
49、uality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called P