Standard No.:	JB/T 3370-2011
English Name:	Rolling bearings ― Cylindrical roller bearings for universal joints
Chinese Name:	滚动轴承 万向节圆柱滚子轴承
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:	2011-12-20
Implemented on:	2012-4-1
Status:	valid
Superseding:	JB/T 3370-2002
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	244.0
Delivery:	via email in 1 business day

1 Scope This standard specifies structural types, designation methods, boundary dimensions, technical requirements, detection methods, inspection rules, marking and rustproof packaging and the like of cylindrical roller bearings for cross axle type universal joints used for steel rolling machineries, lifting and transportation machineries and other heavy machineries. This standard is applicable to the production, inspection and acceptance of cylindrical roller bearings for universal joints (hereinafter referred to as “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 undated references, the latest edition (including any amendments) of the normative document is applicable to this standard. GB/T 307.2-2005 Rolling Bearings-Measuring and Gauging Principles and Methods GB/T 1801-2009 Geometrical Product Specifications (GPS)- Limits and Fits- Selection of Tolerance Zones and Fits GB/T 3203-1982 Specification for Carburizing Steels of Bearings 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 JB/T 24605-2009 Rolling Bearings-Marking for Products GB/T 24608-2009 Rolling Bearings and Commercial Parts-Inspection Rules JB/T 1255-2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel JB/T 6639-2004 Rolling Bearing Parts-Skeleton Acrylonitrile-buta-diene Copolymers Seal-Specifications JB/T 7051-2006 Rolling Bearing Parts- Methods for the Measurement and Assessment of Surface Roughness JB/T 8881-2011 Rolling Bearings-Carburizing Heat-treatment for Parts- Specifications

Contents 1 Scope 2 Normative References 3 Symbols 4 Designation Methods 4.1 Prefix Code 4.2 Basic Code 4.3 Suffix Code 4.4 Designation Example 5 Structural Types 6 Boundary Dimensions 7 Technical Requirements 7.1 Material and Heat Treatment 7.2 Tolerances 7.3 Surface Roughness 7.4 Fits 7.5 Rotating Flexibility 7.6 Appearance Quality 8 Detection Methods 8.1 Tolerance Detection 8.2 Surface Roughness Detection 8.3 Rotating Flexibility Inspection 8.4 Appearance Quality Inspection 9 Inspection Rules 9.1 Delivery Inspection 9.2 Acceptance Inspection 10 Marking 11 Rustproof Packaging Figure 1 ZW Type Figure 2 ZW...RS Type Figure 3 ZW...LS Type Figure 4 ZWC Type Figure 5 ZWC...RS Type Figure 6 ZWC...LS Type