BRITISH STANDARD AUTOMOBILE SERIES BS AU 180 5 1983 ISO 6314 1980 Brake linings — Part 5 Method for determining resistance to water, saline solution, oil and brake fluid of brake lining material [ISO[.]
Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 52: G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BRITIS H S TAND ARD AUTO MO BILE S E RIE S BS AU 80 -5 : 983 IS O 63 : 980 Brake linings — Part : Method for determining resistance to water, saline solution, oil and brake fluid of b rake lining material [IS O title : Road ve hicle s — Brake linings — Resistance to wate r, saline solution, oil and b rake fluid — Te st p roce dure] UD C 62 1 - 597 6: 620 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 52: G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 80-5 :1 983 Committee responsible for this British Standard This Britis h S tandard was p ub lis hed under the direction of the Automob ile S tandards C ommittee AUE /- Its p rep aration was entrusted to Technical C ommittee AUE /1 up on which the following b odies were rep res ented: As s ociation of H ydraulic E quip ment Manufacturers Automob ile As sociation British Friction Materials C ouncil D ep artment of Trans p ort London Transp ort E xecutive Motor Industry Research As s ociation National C aravan C ouncil Limited S ociety of Motor Manufacturers and Traders Limited Transp ort and General Workers Union This Britis h S tandard, having b een p rep ared under the direction of the Automob ile S tandards C ommittee, was p ub lis hed under the authority of the Board of BS I and comes into effect on Amendments issued since publication January 83 Amd No © BS I - 00 The following BS I references relate to the work on this s tandard: C omm ittee reference AUE /1 D raft for com ment 8/80 970 D C ISBN 80 31 39 D ate of is s ue C omments Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 52: G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 80-5 :1 983 Contents Page Committee responsible National foreword ii Introduction 1 Scope and field of application References D efinition Test apparatus Sampling and preparation Test procedure E valuation of results Pub lications referred to © BSI 02 - 000 Inside front cover Inside back cover i Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 52: G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 80-5 :1 983 National foreword This British Standard has been prepared under the direction of the Automobile Standards Committee and is identical with ISO 631 4: 980 “Ro ad Brake linings — Resistance to w ater, Test p ro cedure saline solution, vehicles — oil and b rake fluid — ” published by the International Organization for Standardization (ISO) Terminology and conventions The text of the International Standard has been approved as suitable for publication as a British Standard without deviation Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following The comma has been used as a decimal marker In British Standards it is current practice to use a full point on the baseline as the decimal marker Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard” Cross-references International Standard C orresponding British Standard ISO 81 7: 975 Part A1 6: 971 BS 903 Methods of testing v ulcanized rub b er The res istance of v ulcanized rub b er to liq uids (Technically equivalent) BS AU 74 Hydraulic b rake system s, no n- p etroleum b ase b rake fluids , ISO 4926: 978 Part : 979 using for road v ehicles Sp ecification for non- p etroleum b ase reference fluids (Identical) BS AU 80 ISO 631 : 980 Part 2: 982 Brake linings Method for m easurem ent of internal shear s trength of lining m aterial (Identical) The Technical Committee has reviewed the provisions of ISO 61 and ISO 631 2, to which reference is made in the text, and has decided that they are acceptable for use in conj unction with this standard A related British Standard to ISO 631 2: 981 is BS AU 80 “Brake linings ” Part “Metho d for m easurem ent of shear strength of dis c b rake p ad and drum b rake shoe ass em b lies ” At present there is no corresponding British Standard for ISO 61 However, it is intended to publish a related standard at a future date NOTE Textual erro r Footnote ) is not applicable ISO 81 7- 975 is in course of revision 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 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 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 ii © BSI 02- 2000 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 52: G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 80-5 :1 983 Introduction Sampling and preparation In a variety of circumstances it is not unknown for — Take at random, from the factory output, a automotive brake linings to become contaminated minimum of fifteen representative linings or pads by water from rain, or salt from sea spray, or oil of nominally the same shape, size and material from axle seal failure or fluid from a wheel cylinder leak Such contamination could cause changes in mechanical strength and or physical shape of a brake lining and thereb y reduce its functional capability Scope and field of application — Prepare samples in accordance with the requirements of ISO 631 or ISO 631 , whichever appropriate for the samples — Mark all samples with a similar pattern of five selected spots for measurements of thickness — Mark each sample with a distinguishing identity — Measure and record the thickness to a This International Standard specifies a laboratory method for exposing samples to detrimental environments, measuring the effect on strength and shape and comparing the results with those from uncontaminated samples It applies to drum brake linings and disc brake pads being of organic content and intended for service on road vehicles tolerance of 0, 01 mm at each spot on each sample, taking care not to indent the samples — Place the test samples at random into five groups of three and keep these groups apart Test procedure Test to be performed at ambient temperature, which should be noted References ISO 61 , Braking of motor vehicle and their trailers — Terminology ISO 81 7, Vulcanized rubbers — Resistance to liquids — Method of test In order to present a maximum surface to the active agents, the samples shall be stored in a vertical position during the contamination period, without touching each other 6.1 Group I ISO 492 6, Road vehicles — Hydraulic brake Store the three samples in normal room atmosphere systems — Non-petroleum base reference fluids for days Measure and record thickness at each ISO 631 , Road vehicles — Brake linings — spot immediately prior to shearing Internal shear strength of lining materials — Shear test all samples in accordance with ISO 631 Test procedure or ISO 631 and record the figures ISO 631 , Road vehicles — Brake linings — Shear 6.2 Group II strength of disc brake pad and drum brake shoe Store the three samples in a bath of water assemblies — Test procedure for days Definition For the purpose of this International Standard, the following definition applies: Remove from bath and dry surfaces with ab sorb ent paper Measure and record thickness at each spot within of drying and immediately prior to resistance shearing the ab ility to resist a change in thickness or shear Shear test all samples in accordance with ISO 631 strength due to contamination expressed as or ISO 631 and record the figures percentage of the figures for similar uncontaminated specimens 6.3 Group III Immerse the three samples in a b ath containing a Test apparatus The test apparatus shall consist of: a) containers, for fluids and immersed samples; b) ball- ended micrometer, for measuring sample thickness; c) a material shear test rig, as describ ed in ISO 631 or ISO 631 © BSI 02 - 000 solution of sodium chloride, 00 g/l, for days Remove from the bath and dry the surfaces with absorbent paper Measure and record thickness at each spot within of drying and immediately prior to shearing Shear test all samples in accordance with ISO 631 or ISO 631 and record the figures Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 52: G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 80-5 :1 983 6.4 Group IV Immers e the three s amp les in a b ath of lub ricating oil, conforming to sp ecification oil no in the Annex of IS O 81 7, for 48 h Remove from b ath and dry s urfaces with ab s orb ent p ap er Evaluation of results — For each s amp le and at each s tage of thicknes s meas urement, average the five readings and record — C hange of thicknes s b y contamination is exp ress ed as the difference in average thicknes s Meas ure and record thicknes s at each s p ot for each s amp le b efore and after contamination within of drying and immediately p rior The figures for the three s amp les may b e to s hearing averaged to give a figure for the p roduct S hear test all s amp les in acordance with IS O 63 1 — C hange of s hear s trength b y contamination is or IS O 63 and record the figures exp res s ed as the difference b etween the average 6.5 Group V of the contaminated s amp les and that for the uncontaminated samp les This may b e given as a Immers e samp les in a b ath of b rake fluid conforming to sp ecification of comp atib ility fluid p ercentage of the average value for uncontaminated samp les in IS O 492 6, for 48 h Remove from b ath and dry s urfaces with ab s orb ent p ap er Meas ure and record thicknes s at each s p ot within of drying and immediately p rior to s hearing S hear test all samp les in accordance with IS O 63 1 or IS O 63 and record the figures © BS I - 00 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 52: G M T+00: 00 2006, U n trol l ed Copy, (c) BSI Publications referred to See national foreword © BSI 02 - 000 BS AU 80-5 :1 983 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 52: G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 80-5 :1 983 ISO 631 4:1 980 BSI — British Standards Institution BS I is the indep endent national b ody res p ons ib le for p rep aring Britis h S tandards It p res ents the UK view on s tandards in E urop e and at the international level It is incorp orated b y Royal C harter Revisions Britis h S tandards are up dated 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