JB/T 3370-2011 in English

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