Standard No.:	JB/T 8880-2010
English Name:	Rolling bearings-Deep groove ball bearings for electric motors-Specifications
Chinese Name:	滚动轴承 电机用深沟球轴承 技术条件
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:	State Economic and Trade Commission
Issued on:	2010-2-11
Implemented on:	2010-7-1
Status:	valid
Superseding:	JB/T 8880-2000 Deep groove ball bearing for electric motors ― Specifications
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	314.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the technical requirements, measurement and test methods, inspection rules, marking, rust prevention and packaging of deep groove ball bearings (hereinafter referred to as "bearings") with the bore diameter of 3 mm ~ 120 mm for electric motors for general purposes. This standard is applicable to the production and inspection of the bearing manufacturer and customer acceptance. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to 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，Roiling beatings-Tolerances – Part 2: Measuring and gauging principles and methods, MOD) GB/T 307.3-2005 Rolling Bearings-General Technical Regulations GB/T 2828.1-2003 Sampling Procedures for Inspection by Attributes-Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection (ISO2859-1: 1999, IDT) GB/T 781l-2007 Rolling Bearings-Symbols for Quantities (ISO 1524l: 2001, IDT) 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 2781-2005 Rolling Bearings-Miniature Ball Bearings-Specifications 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 3574-1997 Rolling Bearings-Marking for Products JB/T 5313-2001 Rolling Bearing-Measuring Methods for Vibration (Velocity) JB/T 5314-2002 Rolling Bearings-Measuring Methods for Vibration (Acceleration) JB/T 6639-2004 Rolling Bearing Parts-Skeleton Acrylonitrile-buta-diene Copolymers Seal-Specifications JB/T 6641-2007 Rolling Bearings-Residual Magnetism and Its Assessment Method JB/T 7047-2006 Rolling Bearings-Specifications of Vibration (Acceleration) for Deep Groove Ball Bearings JB/T 7048-2002 Rolling Bearing Parts-Plastic Cage-Specifications JB/T 7050-2005 Rolling Bearings-Assessment Methods for Cleanliness JB/T 7051-2006 Rolling Bearing Parts-Methods for the Measurement and Assessment of Surface Roughness JB/T 7752-2005 Rolling Bearings-Sealed Deep Groove Ball Bearings-Specifications JB/T 8571-2008 Rolling Bearings-Sealed Deep Groove Ball Bearings-Performance Test Rule of Dustproofing, Grease Leakage and Temperature Rise JB/T 10187-2000 Rolling Bearings-Deep Groove Ball Bearing Vibration (Velocity)-Specifications JB/T 10239-2001 Rolling Bearings-Specifications of Curled Shield for Deep Groove Ball Bearings JB/T 10336-2002 Rolling Bearings and Parts-Supplementary Specifications JB/T 10337-2002 Rolling Bearing Parts-Pressing Cage-Specifications

Contents 1 Scope 2 Normative References 3 Symbols 4 Designation Methods 5 Technical Requirements 5.1 Materials and Heat Treatment of Rings and Rolling Elements 5.2 Cage 5.3 Seal and Shield 5.4 Tolerance 5.5 Surface Roughness 5.6 Radial Internal Clearance 5.7 Fits 5.8 Cleanliness 5.9 Residual Magnetism 5.10 Lubricating and Sealing Performance 5.11 Vibration 5.12 Friction Moment 5.13 Others 6 Measurement and Test Methods 6.1 Tolerance 6.2 Surface Roughness 6.3 Radial Internal Clearance 6.4 Cleanliness 6.5 Residual Magnetism 6.6 Dust Proofing, Grease Leakage and Temperature Rise Performance 6.7 Vibration 7 Inspection Rules 7.1 Delivery Inspection 7.2 Type Inspection 8 Marking 9 Packaging Appendix A (Normative) Fits of Bearing with Shaft and Housing Hole Table 1 Radial Internal Clearance of Deep Groove Ball Bearings for Electric Motors Table 2 Inspection Items