Designation:F2953−12StandardSpecificationforPhenolicRawMaterialsfortheUseinBearingCages1ThisstandardisissuedunderthefixeddesignationF2953;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversbasiccharacteristicsrequiredforporouslaminatedphenolicmaterialsintendedforuseasinstrumentandthin-sectionball-bearingretainers(cages)andthemethodsofdeterminingthesecharacteristics.1.2Forms—Sheets,rolledtubes,moldedtubes,androdsarerecommendedformsoflaminatedmaterialcoveredbythisspecification.1.3IntendedUse—Materialsproducedtothisspecificationareintendedforuseasball-bearingretainers(cages).Tempera-turerangeislimitedto250°F(117°C)andbelow.1.4Units—Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D618PracticeforConditioningPlasticsforTestingD695TestMethodforCompressivePropertiesofRigidPlasticsD792TestMethodsforDensityandSpecificGravity(Rela-tiveDensity)ofPlasticsbyDisplacementE11SpecificationforWovenWireTestSieveClothandTestSieves2.2ANSI/ASQCStandard:3ANSI/ASQCZ1.4SamplingProceduresandTablesforIn-spectionbyAttributes2.3FederalStandard:4MIL-STD-129MilitaryMakingforShipmentandStorage3.Classification3.1Thematerialshallbefurnishedinthefollowingtypesandformsasspecified:TypeDescriptionFBRolledtubemadefromcottonfabricweighing4oz/yd2(0.14kg/m2)orless,withanominalthreadcountof80by80threadsperinch(31.5by31.5cm).FBFWRolledtubemadefromcottonfabri...
