1 Scope
This standard specifies the terms and definitions, symbols, classification, designation method, basic structural types, basic dimensions, technical requirements, matched mounting, test methods, marking, rustproof packaging, transport and storage of hub bearing or its units for passenger cars (hereinafter referred to as hub bearing units).
This standard is applicable to the production, inspection and acceptance of hub bearing units.
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 amending errors in the text), 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 edition of the normative document is applicable. For undated references, the latest edition of the normative document 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 - Part 2: 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 699-1999 Quality Carbon Structural Steels
GB/T 1144-2001 Straight-sided Spline - Dimensions, Tolerances and Verification
GB/T 2828.1-2003 Sampling Procedures for Inspection by Attributea - Part1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection (ISO 2859-1:1999, IDT)
GB/T 2829-2002 Sampling Procedures and Tables for Periodic Inspection by Attributes ( Apply to Inspection of Process Stability)
GB/T 3098.1-2010 Mechanical Properties of Fasteners - Bolts, Screws and Studs
GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions (ISO 1132-1:2000, Rolling bearings - Tolerances - Part 1:Terms and definitions, MOD)
GB/T 5617-2005 Determination of Effective Depth of Hardening after Induction or Flame Hardening of Steel (ISO 3754:1976, NEQ)
GB/T 5671-1995 General Purpose Lithium Base Grease for Automobile
GB/T 6930-2002 Rolling Bearings – Vocabulary (ISO 5593:1997, IDT)
GB/T 7811-2007 Rolling Bearings - Symbols for Quantities (ISO 15241:2001, IDT)
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 24610.2-2009 Rolling bearings - Measuring Methods for Vibration - Part 2: Radial Ball Bearings with Cylindrical Bore and Outside Surface (ISO 15242-2:2004, IDT)
GB/T 24610.3-2009 Rolling bearings - Measuring Methods for Vibration - Part 2: Radial Spherical and Tapered Roller Bearings with Cylindrical Bore and Outside Surface (ISO 15242-3:2004, IDT)
JB/T 1255-2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel
JB/T 2974-2004 Rolling Bearing - Identification Code - Supplemental Regulations
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 7048-2002 Rolling Bearings - Engineering Plastic Cages - Specifications
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 8236-1996 Rolling Bearings - Internal Clearances and Adjusting Methods for Double-row and Four-row Tapered Roller Bearings
JB/T 8571-2008 Rolling Bearings - Sealed Deep Groove Ball Bearings - Performance Test Rule of Dustproofing, Grease Leakage and Temperature Rise
JB/T 10235-2001 Rolling Bearings - Tapered Roller - Boundary Dimensions
JB/T 10337-2002 Rolling Bearing Parts - Pressing Cage - Specifications
QC/T 502-1999 Metallographic Test for Induction Quenched Parts for Automobile
QC/T 783-2007 Speedometer Sensor for Automobile and Motorcycle
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Classification
6 Designation Method
6.1 Arrangement Sequence
6.2 Type Code
6.3 Dimension Code
6.4 Suffix Code
6.5 Examples
7 Basic Structural Types
8 Basic Dimensions
9 Technical Requirements
9.1 Material and Heat Treatment
9.2 Tolerances
9.3 Surface Roughness
9.4 Internal Clearance
9.5 Residual Magnetism
9.6 Vibration
9.7 Lubrication and Sealing
9.8 Bolts
9.9 Sensor
9.10 Appearance Quality
9.11 Life
9.12 Others
10 Matched Mounting of Hub Bearing Units
11 Test Methods
12 Inspection Rules
12.1 Delivery Inspection
12.2 Acceptance Inspection
12.3 Type Inspection
13 Marking
14 Rustproof Packaging
15 Transport and Storage
Appendix A (Normative) Nominal Dimensions for Part of Hub Bearing Units
A.1 Hub Bearing Units of Type DAC
A.2 Hub Bearing Units of Type DU
A.3 Hub Bearing Units of Type DACF
A.4 Hub Bearing Units of Type DUF
A.5 Hub Bearing Units of Type DAC2F
Appendix B (Informative) Matched Mounting Specifications for Hub Bearing Units
B.1 Dimensional Tolerance
B.2 Internal Clearance
B.3 Tightening Torque
Appendix C (Normative) Test Rig Simulation Test
C.1 Test Scope
C.2 Test Device (see Figure C.1)
C.3 Test Conditions
C.4 Test Method
Figure 1 Type DAC
Figure 2 Type DU
Figure 3 Type DACF Outer Ring Rotation
Figure 4 Type DACF Inner Ring Rotation
Figure 5 Type DUF
Figure 6 Type DAC2F for Non-driving Wheel (Through-hole Structure)
Figure 7 Type DAC2F for Non-driving Wheel (Actual Shaft Structure)
Figure 8 Type DU2F for Driving Wheel
Figure 9 Type DAC2F for Shaft-rivet Combination
Figure 10 Type DAC2F with Sensor
Figure 11 Schematic Diagram for Geometrical Tolerances
Figure 12 Schematic Diagram for Axial Internal Clearance
Figure C.1 Test Devices
Table 1 Arrangement Sequence
Table 2 Type code
Table 3 Inner Ring of Hub Bearing Units of Type DAC and Type DACF
Table 4 Outer Ring of Hub Bearing Units of Type DAC
Table 5 Inner Ring of Hub Bearing Units of Type DU and Type DUF
Table 6 Outer Ring of Hub Bearing Units of Type DU
Table 7 Tolerance of Finished Flanged Hub Bearing Unit
Table 8 Inspection Items
Table B.1 Matching Shaft Diameter Tolerance
Table B.2 Matching Hole Tolerance
