1 Scope
This standard specifies the classification, designation methods, structural types, basic dimensions and technical conditions of unground ball bearings (hereinafter referred to as “bearings”).
The using temperature range of plastic bearings specified in this standard is -10℃~120℃.
This standard is applicable to production and inspection of the manufacturer and type selection and acceptance of the customer.
2 Normative References
The provisions in the following documents, through reference in this standard, constitute the provisions of this standard. For dated reference, subsequent amendments to (excluding the corrections to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
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 308-2002 Rolling Bearings - Steel Balls (ISO 3290: 1998, NEQ)
GB/T 699-1999 Quality Carbon Structural Steels
GB/T 708-1988 Dimension Shape Weight and Tolerance for Cold-rolled Steel Plates and Sheets
GB/T 4199-2003 Rolling Bearings-Tolerances-Definitions (ISO 1132-1: 2000, Rolling Bearings-Tolerances-Part 1: Terms and definitions, MOD)
GB/T 7811-1999 Rolling Bearings-Symbols for Quantities
GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging
GB/T 13237-1991 Cold-rolled Quality Carbon Structural Steel Sheets and Strips
GB/T 18254-2002 High-carbon Chromium Bearing Steel
JB/T 3573-2004 Rolling Bearings - Methods for the Measurement of Radial Internal Clearance
JB/T3574-1997 Rolling Bearings-Marking for Products
JB/T 5301-2007 Rolling Bearings-Carbon Steel Balls
JB/T 7051-2006 Rolling Bearing Parts-Methods for the Measurement and Assessment of Surface Roughness
JB/T 8921-1999 Rolling Bearings and Commercial Parts - Inspection Rules
YB/T 5059-1993 Cold-rolled Low Carbon Steel Strips
Contents
Foreword I
1 Scope
2 Normative References
3 Symbols
4 Classification and Designation Methods
4.1 Classification
4.2 Designation Methods
5 Basic Dimensions
5.1 Machined Ring Unground Ball Bearing with a Steel Cage
5.2 Machined Ring Full Complement Unground Ball Bearing
5.3 Two-piece Outer Ring Full Complement Unground Ball Bearing with Outer Housing
5.4 Drawn Cup Unground Ball Bearing with Outer Housing
5.5 Stamping Ring Unground Ball Bearing with Outer Housing
5.6 Stamping Outer Ring Unground Angular Contact Ball Bearing with Outer Housing
5.7 Unground Flat Bottom Thrust Ball Bearing with Outer Housing
5.8 Plastic Outer Ring Unground Ball Bearing
5.9 Full Complement Double Row Unground Ball Bearing
5.10 Flanged Universal Ball Bearing with a Stamping Housing
6 Basic Dimensions of Inch Series Unground Ball Bearings
7 Technical Requirements
7.1 Material and Hardness
7.2 Tolerances
7.3 Surface Roughness
7.4 Radial Internal Clearance
7.5 Balls Matched with Bearing
7.6 Rotating Flexibility
7.7 Appearance Quality
8 Measurement Methods
9 Inspection Rules
10 Marking, Rust Prevention and Packaging
Appendix A (Informative) Common Structural Types of Unground Ball Bearings
Appendix B (Normative) Basic Dimensions of Inch Series Unground Ball Bearings
B.1 Designation
B.2 Basic Dimensions
