Standard No.:	JB/T 8717-2010
English Name:	Rolling bearings-Angular contact thrust ball bearings for steering-gear
Chinese Name:	滚动轴承 转向器用推力角接触球轴承
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:	Ministry of Industry and Information Technology
Issued on:	2010-02-11
Implemented on:	2010-7-1
Status:	valid
Superseding:	JB/T 8717-1998 Rolling bearings. Angular contact thrust ball bearings for steering-gear
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	264.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the designation method, boundary dimensions and specification of 560000 type and KOW-560000 type angular contact thrust ball bearings (hereinafter referred to as "bearings") for steering-gear for automobiles, tractors and engineering vehicles. This standard is applicable to the production and inspection of 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 correction 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 307.2-2005 Rolling Bearings-Measuring and Gauging Principles and Methods (ISO 1132-2: 2001.Rolling bearings-Tolerances-Part2: Measuring and gauging principles and methods, MOD) GB/T 307.3-2005 Rolling Bearings--General Technical Regulations GB/T 308-2002 Rolling Bearings-Steel Balls GB/T 4199-2003 Rolling bearings-Tolerances-Definitions(ISO 1 132-1: 2001, Rolling bearings-Tolerances-Part1: Terms and definitions, MOD) 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 (neq FOCT 16523: 1970) 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 3574-1997 Rolling Bearings-Marking for Products JB/T 6641-2007 Rolling Bearings-Residual Magnetism and Its Assessment Method JB/T 7048-2002 Rolling Bearings-Engineering Plastic Cages-Specifications JB/T 892l-1999 Rolling Bearings and Commercial Parts-Inspection Rules JB/T 10337-2002 Rolling Bearing Parts-Pressing Cage-Specifications QC/T 29096-1996 Steering Gear Test Methods

Contents Foreword I 1 Scope 2 Normative References 3 Symbols 4 Designation Methods 5 Marking Example 6 Boundary Dimensions 7 Technical Requirements 8 Test Methods 9 Inspection Rules 10 Marking, Rust Prevention and Packaging Appendix A (Informative) Bearing Boundary Dimensions Appendix B (Normative) Measurement Methods of Bearing Friction Moment and its Fluctuating Value B.1 Bearing Friction Moment and its Fluctuating Value B.2 Measurement Methods Appendix C (Normative) Measurement Methods for the Radial Displacement of Assembled Bearing Cage Appendix D (Informative) Comparison of New and Old Bearing Types Figure 1 560000 Type Figure 2 KOW-560000 Type Table 1 Shaft Washer Table 2 Housing Washer Table 3 Radial Displacement Table 4 Sampling Inspection Items for Finished Bearing