1 Scope
This standard specifies the definitions, classification, designation method, structural type, boundary dimensions, technical requirements, testing method, inspection rules, marking and packaging of clutch release bearing unit for automobile.
This standard is applicable to the production, inspection and acceptance of clutch release bearing unit for automobile (hereinafter referred to as the “bearing unit”).
2 Normative References
The following documents are indispensable for the application of this document. For dated references, only the dated edition is applicable to this document. For undated references, the latest edition (including all the amendments) applies.
GB/T 230.1-2009 Metallic Materials-Rockwell Hardness Test-Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 307.3-2005 Rolling Bearings-General Technical Regulations
GB/T 2829-2009 Sampling Procedures and Tables for Periodic Inspection by Attributes (Applicable to Inspection of Stability for Productive Process)
GB/T4340.1-2009 Metallic Materials-Vickers Hardness Test-Part 1:Test Method
GB/T 5671-1995 General Purpose Lithium Base Grease for Automobile
GB/T 6882-2008 Acoustics-Determination of Sound Power Levels of Noise Sources Using Pressure-Precision Methods for Anechoic and Hemi-Anechoic Rooms
GB/T 6930-2002 Rolling Bearings-Vocabulary
GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging
GB/T 15089-2001 Classification of Power-driven Vehicles and Trailers
GB/T 18254-2002 High-carbon Chromium Bearing Steel
GB/T24605-2009 Rolling Bearings-Marking for Products
GB/T 24608-2009 Rolling Bearings and Commercial Parts-Inspection Rules
JB/T 1255-2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel
JB/T 6641 – 2007 Rolling Bearings-Residual Magnetism and Its Assessment Method
JB/T 7051-2006 Rolling Bearing Parts-Methods for the Measurement and Assessment of Surface Roughness
JB/T 7361-2007 Rolling Bearings-Test Method for Hardness of Parts
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
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Classification
6 Designation Method
6.1 Bearing Unit Code Arrangement Sequence
6.2 Contact Circular Diameter or Connect Groove Diameter Code
6.3 Structural Type Code
6.4 Bore Diameter Code
6.5 Matched Width Code
6.6 Release Sleeve Material Code
6.7 Supplementary Code
6.8 Code Examples
7 Structural Types
7.1 Non-aligning Bearing Unit
7.2 Self-aligning Bearing Unit
8 Boundary Dimensions
9 Technical Requirements
9.1 Materials and Heat Treatment
9.2 Tolerance
9.3 Surface Roughness
9.4 Contact Angle or Internal Clearance
9.5 Residual Magnetism
9.6 Lubricating and Sealing
9.7 Service Life
9.8 Starting Torque
9.9 Noise
9.10 Aligning Displacement and Aligning Force
9.11 Appearance Quality
9.12 Others
10 Testing Method
10.1 Measurement of Tolerance
10.2 Measurement of Surface Roughness
10.3 Measurement of Contact Angle and Internal Clearance
10.4 Measurement of Grease Filling Amount
10.5 Measurement of Residual Magnetism
10.6 Testing of Hardness
10.7 Inspection of Appearance Quality
10.8 Sealing Performance Test
10.9 Life Test
10.10 Measurement of Aligning Displacement and Aligning Force
10.11 Measurement of Starting Torque and Noise Test
11 Inspection Rules
11.1 Delivery Inspection
11.2 Acceptance Inspection
11.3 Type Inspection
12 Marking
13 Rustproof Packaging
14 Transportation and Storage
Appendix A (Informative) Boundary Dimensions of Bearing Unit
Appendix B (Normative) Test Rig Simulate Life Test Method
Appendix C (Normative) Measurement Method for Aligning Displacement
Appendix D (Normative) Measurement Method for Aligning Force
Appendix E (Normative) Measurement Method of Starting Torque
Appendix F (Normative) Test Method of Noise
