1 Scope
This standard specifies the structural types, designation methods, basic dimensions and technical requirements of needle roller bearings without inner ring for cross axle type universal joints (hereinafter referred to as “needle roller bearings for universal joints”).
This standard is applicable to needle roller bearings for universal joints and is used for the production and inspection of the manufacturer as well as the type selection and acceptance of the customer.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding corrections to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 309-2000 Rolling Bearings-Needle Rollers (neq ISO 3096: 1996)
GB/T 699-1999 Quality Carbon Structural Steels
GB/T 700-1988 Carbon Structural Steels (neq DIN 630: 1987)
GB/T 3077-1999 Alloy Structure Steels (neq DIN EN 10083-1: 1991)
GB/T 5671-1995 General Purpose Lithium Base Grease for Automobile
GB/T 7811-1999 Rolling Bearings-Symbols for Quantities
GB/T 8597-2003 Rolling Bearings-Rust Proof Packaging
GB/T 9450-1988 Determination and Verification of the Effective Depth of Carburized and Hardened Cases of Steel Parts
GB/T 18254-2002 High-carbon Chromium Bearing Steel
GB/T 18579-2001 High-carbon Chromium Bearing Steel Wires
JB/T 1255-2001 Specification for Heat-treatment of Rolling Bearing Parts Made from High Carbon Chromium Steel
JB/T3574-1997 Rolling Bearings-Marking for Products
JB/T 6050 Generalization of Hardness Test for Heat Treated Iron and Steel Parts
JB/T 6639-2004 Rolling Bearing Parts-Skeleton Acrylonitrile-buta-diene Copolymers Seal-Specifications
JB/T 8921-1999 Rolling Bearings and Commercial Parts-Inspection Rules
QC/T 262-1999 Metallographic Inspection for Automobile Carburized Gears
Contents
Foreword I
1 Scope
2 Normative References
3 Symbols
4 Designation Methods
4.1 Prefix Code
4.2 Basic Code
4.3 Suffix Code
4.4 Marking Example
5 Structural Types and Basic Dimensions
6 Technical Requirements
6.1 Material and Heat Treatment
6.2 Needle Roller
6.3 Seal
6.4 Lubricating Grease
6.5 Cover Plate
6.6 Surface Roughness of Matching Surface and Outside Bottom Surface
6.7 Tolerances
6.8 Total Circumference Clearance of Needle Roller Assembly
6.9 Minimum Torque Load Suffered by the Spot Welding Cover Plate Type Needle Roller Bearing for Universal Joint after Its Cover Plate is Welded with the Outer Ring
6.10 Others
7 Measurement Methods
7.1 Total Circumference Clearance of Needle Roller Assembly
7.2 Deviation of Smallest Single Bore Diameter of Needle Roller Assembly
7.3 Radial Runout of Outer Ring of Whole Set Needle Roller Bearing for Universal Joint
7.4 Minimum Torque Load Suffered by the Spot Welding Cover Plate Type Needle Roller Bearing for Universal Joint after Its Cover Plate is Welded with the Outer Ring
7.5 Detection of Heat Treatment Quality
8 Inspection Rules
9 Marking, Rust Prevention and Packaging
Figure 1 WW... RS Type
Figure 2 WW...PP2 Type
Figure 3 WN...T Type
Figure 4 WN...PP2 Type
Figure 5 WN...RS Type
Figure 6 WY Type
Figure 7 WY...PP Type
Figure 8 WY...RS Type
Figure 9 W Type
Figure 10 WT...RS Type
Figure 11 WT...PP2 Type
Figure 12 WD...PP2 Type
Figure 13 WD...RS Type
Figure 14 Cover Plate Structure
Figure 15 Measurement Method for Radial Runout
