1 Scope
This standard specifies the structural types, technical requirements, measurement methods, inspection rules, marking and packaging and the like of combined needle roller bearings (hereinafter referred to as “combined bearings”).
This standard is applicable to the production, inspection and customer acceptance of combined bearings.
2 Normative References
The following references are indispensable for the application of this standard. For dated references, only the dated edition is applicable to this document. For the undated references, the latest editions of the normative documents (including all the amendments) are applicable to this document.
GB/T 275-1993 Shaft and Housing Fits for Rolling Bearings
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-Definitions
GB/T 4604-2006 Rolling Bearings-Radial Internal Clearance
GB/T 5213-2008 Cold Rolled Low Carbon Steel Sheet and Strip
GB/T 6930-2002 Rolling Bearings-Vocabulary
GB/T 7811-2007 Rolling Bearings-Symbols for Quantities
GB/T 8597-2003 Rolling Bearings-Rust Pr00f Packaging
GB/T 16643-1996 Rolling Bearings - Combined Needle Roller - Thrust Roller Bearings-Boundary Dimensions
GB/T 18254-2002 High-carbon Chromium Bearing Steel
GB/T 24605-2009 Rolling Bearings-Marking for Products
GB/T 24608-2009 Rolling Bearings and Commercial Parts-Inspection Rules
GB/T 25760-2010 Rolling Bearings - Combined Needle Roller - Thrust Roller Bearings-Boundary Dimensions
GB/T 25761-2010 Rolling Bearings-Combined Needle Roller Bearings with Angular Contact Ball Bearings-Boundary Dimensions
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 7048-2011 Rolling Bearing Parts-Plastic Cage-Specifications
JB/T 7051-2006 Rolling Bearing Parts-Methods for the Measurement and Assessment of Surface Roughness
JB/T 10337-2002 Rolling Bearing Parts-Pressing Cage-Specifications
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Structural Types
6 Technical Requirements
6.1 Material and Heat Treatment
6.2 Tolerances
6.3 Surface Roughness
6.4 Radial Internal Clearance
6.5 Residual Magnetism
6.6 Interchangeability
6.7 Others
7 Detection Methods
7.1 Tolerance Measurement
7.2 Measurement of Surface Roughness
7.3 Measurement of Radial Internal Clearance
7.4 Measurement of Residual Magnetism
8 Inspection Rules
9 Marking
10 Rustproof Packaging
Appendix A (Informative) Technical Requirements for Shafts and Housing Holes Matched with Combined Bearings
A.1 Fits of Shafts and Housings with the Combined Bearings
A.2 Shafts Matched with the Combined Bearings without Inner Rings
