Standard No.:	JB/T 8874-2010
English Name:	Rolling bearings-Split type plummer block housings-Specifications
Chinese Name:	滚动轴承 剖分立式轴承座 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
Issued by:	Ministry of Industry and Information Technology
Issued on:	2010-02-11
Implemented on:	2010-7-1
Status:	valid
Superseding:	JB/T 8874-2000 Plummer block housings for rolling bearings ― Specifications
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	164.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the technical requirements, measurement methods, inspection rules, marking, packaging and storage of the two-bolt and four-bolt split type plummer block housings (hereinafter referred to as the “block housings”) whose boundary dimensions meet the requirements of GB/T 7813-2008. This standard is applicable to the manufacturing, inspection and customer acceptance of block housings. 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 275-1993 Shaft and Housing Fits for Rolling Bearings 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 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 (ISO 1132-1: 2000, Roiling Bearings-Tolerances-Part 1.Terms and Definitions, MOD) GB/T 6930-2002 Rolling Bearings - Vocabulary (ISO 5593: 1997, IDT) GB/T 7811-2007 Rolling Bearings - Symbols for Quantities (ISO 5241: 2001, IDT) GB/T 7813-2008 Rolling Bearings - Split Type Plummer Block Housings - Boundary Dimensions (ISO 113: 1999, NEQ) GB/T 8597-2003 Rolling Bearings - Packaging and Packing GB/T 9439-1988 Grey Iron Castings GB/T 11352-2009 Carbon Steel Castings for General Engineering Purpose (ISO 3755: 1991, ISO 4990: 2003, MOD)

Contents Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Symbols 5 Technical Requirements 5.1 Materials 5.2 Tolerance 5.3 Surface Roughness 5.4 Appearance Quality 6 Measurement Method 6.1 Measurement of Tolerance 6.2 Measurement of Surface Roughness 7 Inspection Rules 8 Marking, Rustproof Packaging and Storage Table 1 Major and Secondary Inspection Items of Block Housing