Standard No.:	JB/T 9144-2010
English Name:	Rolling bearings-Rolling bearings for railway wagon and coach
Chinese Name:	滚动轴承 铁路车辆用轴承
Chinese Classification:	J11    Rolling bearing
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Issued by:	MIIT
Issued on:	2010-2-11
Implemented on:	2010-7-1
Status:	valid
Superseding:	JB/T 9144-1999 Specifications of rolling bearing for railwaywagon and coach
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	204.0
Delivery:	via email in 1 business day

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