1 Scope
This standard specifies the structural types, dimensions and technical conditions of combined needle roller bearings with double direction thrust cylindrical roller bearings (hereinafter referred to as "combined bearings").
This standard is applicable to the production, inspection and acceptance of combined bearings.
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 (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 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods (ISO 1132-2: 2001, MOD)
GB/T 1184-1996 Geometrical Tolerancing-Geometrical Tolerance for Features without Individual Tolerance Indications (eqv ISO 2768-2: 1989)
GB/T 1800.2-2009 Geometrical Product Specifications (GPS)-Limits and Fits - Part 2: Tables of Standard Tolerance Grades and Limit Deviations for Holes and Shafts (ISO 286-2: 1988, MOD)
GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions (ISO 1132-1: 2000, MOD)
GB/T 4604-2006 Rolling Bearings - Radial Internal Clearance (ISO 5753: 1991, MOD)
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 13237-1991 Cold-rolled Quality Carbon Structural Steel Sheets and Strips
GB/T 18254-2002 High-carbon Chromium Bearing Steel
GB/T 24605-2009 Rolling Bearings-Marking for Products
GB/T 25769-2010 Rolling Bearings - Methods for the Measurement of Radial Internal Clearance
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 7048-2002 Rolling Bearing Parts - Plastic Cage - Specifications
JB/T 7051-2006 Rolling Bearing Parts-Methods for the Measurement and Assessment of Surface Roughness
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Structural Types
6 Dimensions
7 Technical Requirements
8 Test Methods
9 Inspection Rules
10 Marking
11 Rustproof Packaging
Appendix A (Normative) Measurement Methods for ΔTs, S1a, Kia, Kea and Sd
1 Scope
This standard specifies the structural types, dimensions and technical conditions of combined needle roller bearings with double direction thrust cylindrical roller bearings (hereinafter referred to as "combined bearings").
This standard is applicable to the production, inspection and acceptance of combined bearings.
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 (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 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods (ISO 1132-2: 2001, MOD)
GB/T 1184-1996 Geometrical Tolerancing-Geometrical Tolerance for Features without Individual Tolerance Indications (eqv ISO 2768-2: 1989)
GB/T 1800.2-2009 Geometrical Product Specifications (GPS)-Limits and Fits - Part 2: Tables of Standard Tolerance Grades and Limit Deviations for Holes and Shafts (ISO 286-2: 1988, MOD)
GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions (ISO 1132-1: 2000, MOD)
GB/T 4604-2006 Rolling Bearings - Radial Internal Clearance (ISO 5753: 1991, MOD)
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 13237-1991 Cold-rolled Quality Carbon Structural Steel Sheets and Strips
GB/T 18254-2002 High-carbon Chromium Bearing Steel
GB/T 24605-2009 Rolling Bearings-Marking for Products
GB/T 25769-2010 Rolling Bearings - Methods for the Measurement of Radial Internal Clearance
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 7048-2002 Rolling Bearing Parts - Plastic Cage - Specifications
JB/T 7051-2006 Rolling Bearing Parts-Methods for the Measurement and Assessment of Surface Roughness
Contents of GB/T 25768-2010
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Structural Types
6 Dimensions
7 Technical Requirements
8 Test Methods
9 Inspection Rules
10 Marking
11 Rustproof Packaging
Appendix A (Normative) Measurement Methods for ΔTs, S1a, Kia, Kea and Sd
