Standard No.:	JB/T 8919-2010
English Name:	Rolling bearings-Insert bearings and eccentric locking collars-Specifications
Chinese Name:	滚动轴承 外球面球轴承和偏心套 技术条件
Chinese Classification:	J11    Rolling bearing
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	21.100.20 21.100.20    Rolling bearings 21.100.20
Source Content Issued by:	Ministry of Industry and Information Technology
Issued on:	2010-02-11
Implemented on:	2010-7-1
Status:	valid
Superseding:	JB/T 8919-1999 Rolling bearings - Insert bearings and eccentric locking collars - Specifications
Target Language:	English
File Format:	PDF
Word Count:	3000 words
Translation Price(USD):	224.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the technical requirements, measurement methods, inspection rules, packaging and marking of insert bearings (hereinafter referred to as “bearings”) and eccentric locking collars. This standard is applicable to the production and inspection by manufacturers and customer acceptance of the bearings and eccentric locking collars whose boundary dimensions meeting the requirements of GB/T 3882. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies. GB/T 307.2-2005 Rolling Bearings-Measuring and Gauging Principles and Methods (ISO 1132-2: 2001, Roiling bearings-Tolerances-Part 2; Measuring and gauging principles and methods, MOD) GB/T 699-1999 Quality Carbon Structural Steels 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 (ISO 2859-1: 1999, IDT) GB/T 3882-1995 Rolling Bearings-Insert Bearings and Eccentric Locking Collars-Boundary Dimensions (neq ISO 9628: 1992) GB/T 4199-2003 Rolling Bearings-Tolerances-Definitions (ISO 1132-1: 2000, Rolling bearings-Tolerances-Part 1: Terms and definitions, MOD) GB/T 6930-2002 Rolling Bearings-Vocabulary (ISO 5593: 1997, IDT) GB 7324-1994 General Purpose Lithium Lubricating Grease GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging GB/T 18254-2002 High-carbon Chromium Bearing Steel JB/T 1255-2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel JB/T 3574-1997 Rolling Bearings-Marking for Products JB/T 5304-2007 Rolling Bearings-Insert Bearings-Radial Internal Clearance JB/T 6641-2007 Rolling Bearings-Residual Magnetism and Its Assessment Method JB/T 7361-2007 Rolling Bearings-Test Method for Hardness of Parts

Contents Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols (see Figure 1~Figure 7) 5 Technical Requirements 5.1 Materials and Heat Treatment 5.2 Tolerance 5.3 Surface Roughness 5.5 Residual Magnetism 5.6 Marking 5.7 Others 6 Measurement Methods 6.1 Measurement of Accuracy 6.2 Radial Internal Clearance 6.3 Hardness 6.4 Residual Magnetism 7 Inspection Rules 8 Marking 9 Packaging, Storage and Transportation Figure 1 Bearing with Jackscrew (UC Type) Figure 2 Bearing with Eccentric Locking Collar (UEL Type) Figure 3 Tapered Bore Bearing (UK Type) Figure 4 Bearing with Jackscrew (UB Type) Figure 5 Bearing with Eccentric Locking Collar (UE Type) Figure 6 Eccentric part of Inner Ring of Bearing with Eccentric Locking Collar Figure 7 Eccentric Locking Collar Figure 8 Measurement of Inner Ring Eccentricity Table 1 Cylindrical Bore Inner Ring Table 2 Tapered Bore Inner Ring Table 3 Outer Ring Table 4 Eccentric Locking Collar Table 5 Surface Roughness Value Table 6 Sampling Inspection Items for Finished Bearings and Eccentric Locking Collars