1 Scope
This standard specifies the designation methods, boundary dimensions, technical requirements, test methods and inspection rules of rolling bearings used for railway wagon and coach axles.
This standard is applicable to the production and inspection of bearing manufacturer and customer acceptance.
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 amending errors in the text), 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 307.1-2005 Rolling Bearings - Radial Bearings - Tolerances (ISO 492:2002, MOD)
GB/T 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods (ISO 1132-2:2001, Rolling Bearings-Tolerances - Part 2: Measuring and Gauging Principles and Methods, MOD)
GB/T 307.3-2005 Rolling Bearings - General Technical Regulations
GB/T 7811-2007 Rolling Bearings - Symbols for Quantities (ISO 15241:2001, IDT)
GB/T 3203-1982 Specification for Carburizing Steels of Bearings
GB/T 8597-2003 Rolling Bearings - Rust Proof Packaging
GB/T 18254-2002 High-carbon Chromium Bearing Steel
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 3573-2004 Rolling Bearings - Methods for the Measurement of Radial Internal Clearance
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 7050-2005 Rolling Bearings - Assessment Methods for Cleanliness
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
JB/T 8921-1999 Rolling Bearings and Commercial Parts - Inspection Rules
Contents
Foreword I
1 Scope
2 Normative References
3 Symbols
4 Designation Method
5 Boundary Dimensions
6 Technical Requirements
6.1 Bearing Material and Heat Treatment
6.2 Tolerance
6.3 Internal Clearance
6.4 Others
6.5 Lubrication and Cleanliness
7 Test Methods
8 Inspection Rules
9 Rustproof Packaging
Appendix A (Informative) Comparison of New and Old Bearing Designations
Figure 1 Measurement Diagram for Axial Internal Clearance of Type 350000-2RZ Bearing
Figure 2 Measurement Diagram for Type NJ Bearing
Figure 3 Measurement Diagram for Type NJP Bearing
Table A.1 Comparison of New and Old Bearing Designations
