Standard No.:	JB/T 8877-2011
English Name:	Rolling bearings--Combined needle roller bearings--Specification
Chinese Name:	滚动轴承 滚针组合轴承 技术条件
Professional Classification:	JB    Professional Standard - Machinery
Issued by:	MIIT
Issued on:	2011-12-20
Implemented on:	2012-4-1
Status:	valid
Superseding:	JB/T 8877-2001 Rolling bearings ― Combined needle roller bearings ― Specifications
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	100.0
Delivery:	via email in 1 business day

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