Standard No.:	GB/T 27559-2011
English Name:	Rolling bearings—Cylindrical roller bearings for spindles of machines
Chinese Name:	滚动轴承 机床主轴用圆柱滚子轴承
Chinese Classification:	J11    Rolling bearing
Professional Classification:	GB    National Standard
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Issued by:	AQSIQ, SAC
Issued on:	2011-11-21
Implemented on:	2012-6-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	120.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the structural type, designation method, boundary dimensions, technical requirements, test methods, inspection principals, marking and rust proof packaging of the cylindrical roller bearings (hereafter referred to as “bearings”) for spindles of machines whose boundary dimensions meet GB/T 283-2007 or GB/T 285-1994 and tolerance class is Class 5, Class 4, Class 2, Class SP or Class UP. This standard is applicable to the production, inspection and acceptance of bearings. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated reference, only the dated edition applies. For undated reference, the latest edition of the normative document (including any amendments) applies. GB/T 272-1993 Rolling Bearing-Identification Code GB/T 274-2000 Rolling Bearings-Chamfer Dimension-Maximum Values GB/T 283-2007 Rolling Bearings - Cylindrical Roller Bearings - Boundary Dimensions GB/T 285-1994 Rolling Bearings - Double Row Cylindrical Roller Bearings - Boundary Dimensions GB/T 307.2-2005 Rolling Bearings - Measuring and Gauging Principles and Methods GB/T 1176-1987 Specification for Cast Copper Alloys GB/T 2828.1-2003 Sampling Procedures for Inspection by Attributes - Part 1: Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions GB/T 6930-2002 Rolling Bearings - Vocabulary GB/T 7811-2007 Rolling Bearings - Symbols for Quantities 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 24610.4-2009 Rolling Bearings - Measuring Methods for Vibration - Part 4: Radial Cylindrical Roller Bearings with Cylindrical Bore and Outside Surface GB/T 25769-2010 Rolling Bearings - Measuring Methods for Radial Internal Clearance JB/T 1255-2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel JB/T 2974-2004 Rolling Bearings - Identification Code - Supplemental Regulations JB/T 6641-2007 Rolling Bearings - Residual Magnetism and Its Assessment Method JB/T 7050-2005 Rolling Bearings - Assessment Methods for Cleanliness JB/T 7051-2006 Rolling Bearing Parts - Methods for the Measurement and Assessment of Surface Roughness JB/T 8922-2011 Rolling Bearings - Specifications for Vibration (Velocity) of Cylindrical Roller Bearings

Contents Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols 5 Designation Methods 6 Structural Types and Boundary Dimensions 7 Technical Requirements 8 Test Methods 9 Inspection Rules 10 Marking 11 Rust Proof Packaging Appendix A (Informative) Working Surface Roughness of Inner Ring