Standard No.:	GB/T 25770-2010
English Name:	Rolling bearings - Bearings for railway wagon
Chinese Name:	滚动轴承 铁路货车轴承
Chinese Classification:	J11    Rolling bearing
Professional Classification:	GB    National Standard
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Issued by:	AQSIQ, SAC
Issued on:	2010-12-23
Implemented on:	2010-6-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	100.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the designation method, structural type, boundary dimensions, technical requirements, test methods, inspection rules, marking, rustproof packaging and storage of rolling bearings (hereinafter referred to as "bearings") for railway wagon. This standard is applicable to the bearings used under the conditions that the speed per hour is not greater than 160 km/h, it is used for the production, inspection and acceptance of bearings. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies. GB/T 272-1993 Rolling Bearing-Identification Code GB/T 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods (ISO 1132-2: 2001, MOD) GB/T 699-1999 Quality Carbon Structural Steels GB/T 3203-1982 Specification for Carburizing Steels of Bearings GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions (ISO 1132-1: 2000, MOD) GB/T 6930-2002 Rolling Bearings - Vocabulary (ISO 5593: 1997, IDT) GB/T 7811-2007 Rolling Bearings - Symbols for Quantities (ISO 15241: 2001, IDT) GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging GB/T 13237-1991 Cold-rolled Quality Carbon Structural Steel Sheets and Strips GB/T 18254-2002 High-carbon Chromium Bearing Steel GB/T 24605-2009 Rolling Bearings-Marking for Products GB/T 24608-2009 Inspection Rules for Rolling Bearings and Commercial Parts JB/T 1255 -2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel JB/T 2974-2004 Rolling Bearings - Identification Code - Supplemental Regulations JB/T 5391-2007 Rolling Bearings-Magnetic Particle Inspection Code of Rolling Bearing Parts for Railway Locomotive and Rolling Stock JB/T 5392-2007 Rolling Bearings-Crack Test of Rolling Bearings Parts for Railway Locomotive and Rolling Stock JB/T 6641-2007 Rolling Bearings - Residual Magnetism and Its Assessment Method JB/T 7048-2002 Rolling Bearing Parts - Plastic Cage - Specifications JB/T 7051-2006 Rolling Bearing Parts-Methods for the Measurement and Assessment of Surface Roughness JB/T 7361-2007 Rolling Bearings - Test Method for Hardness of Parts JB/T 8881-2001 Specifications for Carburizing Heat Treatment of Rolling Bearing Parts TB/T 3010-2001 Ordering Technical Specifications for High-carbon Chromium Bearing Steel of Rolling Bearings for Railway Vehicle

Contents Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols 5 Designation Methods 6 Structural Types 7 Boundary Dimensions 8 Technical Requirements 9 Test Methods 10 Inspection Rules 11 Marking 12 Rustproof Packaging 13 Storage Appendix A (Normative) Assessment Methods for Cleanliness