BS_957-2008.pdf

BS957:2008Publishing and copyright informationThe BSI copyright notice displayed in this document indicates when thedocument was last issued.BSI2008ISBN9780580620805The following BSIreferences relate tothe work on this standard:Committee reference TDW/4Draft for comment 08/30178090 DCPublication historyBS957(inch units)first published July 1941(renumbered as BS957-1in July 1969)BS 957-2(metric units)first published July 1969BS 957(inch and metric)(present edition)published 30 September 2008Amendments issued since publicationAmd.no.DateText affectedBS957:2008ForewordPublishing informationThis British Standardis published by BSIand came into effecton 30 September 2008.It was preparedby Technical CommitteeTDW/4,Technology product realization.A list of organizationsrepresented on this committee can be obtained on request to itssecretary.SupersessionThis British Standard supersedes BS 957-1:1941 and BS 957-2:1969,which are withdrawn.Information about this documentThis British Standard has been fully revised to bring it up to date.Presentational conventionsThe provisions of this standard are presented in roman(i.e.upright)type.Its requirements are expressed in sentences in which the principalauxiliary verb is“shall”.Commentary,explanation and general informative material ispresented in smaller italic type,and does not constitute anormative element.Contractual and legal considerationsThis publication does not purport to include all the necessary provisionsof a contract.Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.iBSI2008BS957:20081 ScopeThis British Standard specifies requirements for feeler gauges,comprising a series of gauging blades(blades)ofgraded thicknessesassembled in a protective sheath or supplied individually.These includerequirements for dimensions which are expressed in metric andinchunits.This standard is applicable to blades of thicknesses:from 0.03 mm to 1.00 mm inclusive(metric units);andfrom 0.001 5 in to 0.025 in inclusive(inch units).2Normative referencesThe following referenced documents are indispensable for theapplication ofthis document.For dated references,only theeditioncited applies.For undated references,the latest edition of thereferenced document(including any amendments)applies.BS EN ISO 6507,Metallic materials-Vickers hardness test3GeneralThe purchaser shall state in his enquiry and order the particularcombination of blades and length of blades required.NOTE Recommendations regarding suitable combinations of blades aregiven in Annex A.4 Material ofblades4.1 The blades shall be made of good quality steel and shall behardened andtempered to a hardness ofnotless than 400 HV normore than 600 HV1).NOTE Consideration should be given to the corrosion resistance andtoughness of steel used.4.2 Blades shallbetestedfor hardnessin accordancewithBS EN ISO 6507 as shown in Table 1 and Table 2.Table 1Hardness test-metricunitsThickness rangeTest load applied for 15 smmkgfW0.15u0.201(9.8 N approx.)0.205(49 N approx.)Table 2Hardness test-inchunitsThickness rangeTest load applied for 15 skgfW0.005u0.0081(9.8 N approx.)0.0085(49 N approx.)DBS EN ISO 6507.BSI20081