ASTM_F_2094_-_F_2094M_-_18a.pdf

Designation:F2094/F2094M18aStandard Specification forSilicon Nitride Bearing Balls1This standard is issued under the fixed designation F2094/F2094M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the establishment of the basicquality,physical/mechanical property,and test requirementsfor silicon nitride balls Classes I,II,and III to be used for ballbearings and specialty ball applications.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 Order of Precedence:2.1.1 In the event of a conflict between the text of thisdocument and the references herein,the text of this documenttakes precedence.Nothing in this document,however,super-sedes applicable laws and regulations unless a specific exemp-tion has been obtained.2.2 ASTM Standards:2C1161 Test Method for Flexural Strength of AdvancedCeramics at Ambient TemperatureC1421 Test Methods for Determination of Fracture Tough-ness of Advanced Ceramics at Ambient Temperature2.3 ANSI Standard:ANSI/ASQC Z1.4 Sampling Procedures and Tables for In-spection by Attributes32.4 ABMA Standards:STD 10 Metal Balls42.5 ASME Standard:B 46.1 Surface Texture(Surface Roughness,Waviness,andLay)52.6 ISO Standards:64505 HardmetalsMetallographic Determination of Poros-ity and Uncombined Carbon2.7 JIS Standards:R 1601 Testing Method for Flexural Strength(Modulus ofRupture)of High Performance Ceramics7R 1607 Testing Method for Fracture Toughness of HighPerformance Ceramics72.8 CEN Standards:EN 843-1 Advanced Technical CeramicsMonolithicCeramicsMechanical Properties at Room Temperature,Part 1.Determination of Flexural Strength8ENV 843-5 Advanced Technical CeramicsMonolithicCeramicsMechanical Properties at Room Temperature,Part 5,Statistical Analysis83.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 ball diameter variation,Vdws,nball diameter varia-tion is the difference between the largest and smallest diametermeasured on the same ball.1This specification is under the jurisdiction ofASTM Committee F34 on RollingElement Bearings and is the direct responsibility of Subcommittee F34.01 onRolling Element.Current edition approved May 1,2018.Published July 2018.Originally approvedin 2001.Last previous edition approved in 2018 as F2094/F2094M18.DOI:10.1520/F2094_F2094M-18A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Application for copies should be addressed to theAmerican National StandardsInstitute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Application for copies should be addressed to the American Bearing Manufac-turers Association,1200 19th Street NW,Suite 300,Washington,DC 20036-2401.5Application for copies should be addressed to the American Society ofMechanical Engineers(ASME),ASME International Headquarters,Three ParkAve.,New York,NY 10016-5990,http:/www.asme.org.6Application for copies should be addressed to the Available from InternationalOrganization for Standardization(ISO),ISO Central Secretariat,BIBC II,Cheminde Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.org.7Application for copies should be addressed to the Japanese Standards Organi-zation(JSA),4-1-24 Akasaka Minato-Ku,Tokyo,107-8440,Japan,http:/www.jsa.or.jp.8Application for copies should be addressed to the British Standards Institute(BSI),389 Chiswick High Rd.,London W4 4AL,U.K.,http:/www.bsi-.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.1.2 ball gauge,S,nprescribed small amount by whichthe lot mean diameter should differ from nominal diameter,thisamount being one of an established series of amounts.A ballgauge,in combination with the