Standard No.:	GB/T 24604-2009
English Name:	Rolling bearings—Angular contact thrust ball bearings used for machine tool screws
Chinese Name:	滚动轴承 机床丝杠用推力角接触球轴承
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:	2009-11-15
Implemented on:	2010-4-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	224.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the designation method, boundary dimension and technical conditions of the metric series angular contact thrust ball bearings used for supporting the machine tool screws (hereinafter referred to as "bearings"). This standard is applicable to the production and inspection of the bearing manufacturers and the type selection and acceptance of the users. 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 editions of these documents are applicable. For undated references, the latest edition of the normative documents 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, MOD) GB/T 307.3-2005 Rolling Bearings - General Technical Regulations GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions (ISO 1132-1: 2000, MOD) GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging 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 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 10186-2000 Rolling bearings - Specifications of Matched Angular Contact Ball Bearings

Contents Foreword I 1 Scope 2 Normative References 3 Symbols (See Figure 1) 4 Designation Method 5 Marking Example 6 Boundary Dimensions 7 Technical Requirements 8 Measurement Methods 9 Inspection Rules 10 Marking 11 Packaging Appendix A (Normative) Schematic Diagram for Measurement of Bearing Starting Friction Moment

* GB/T 272-1993 Rolling bearing - Identification code
* GB/T 307.1-2005 Rolling bearings - Radial bearings - Tolerances
* GB/T 307.2-2005 Rolling bearings - Measuring and gauging principles and methods
* GB/T 307.3-2005 Rolling bearings--General technical regulations
* GB/T 4199-2003 Rolling bearings - Tolerances - Definiations
* GB/T 8597-2003 Rolling bearings - Rust proof packaging
* GB/T 18254-2002 High-carbon chromium bearing steel (including Amendment 1)
* 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 6641-2007 Rolling bearings—Residual magnetism and its assessment method
* JB/T 7048-2002
* JB/T 7051-2006 Rolling bearing parts-Methods for the measurement and assessment of surface roughness
* JB/T 10186-2000