1 Scope
This standard specifies dynamic load and life test for general spherical plain bearings.
This standard is applicable to spherical plain bearings. For spherical plain bearings with special requirements such as special material, special sliding contact surface and special clearance, this test code may be referred to.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document applies.
GB/T 1800.3-1998 Limits and Fits - Bases - Part 3: Numerical Values Tables of Standard Tolerances and Fundamental Deviations (eqv ISO 286-1: 1988)
GB/T 3944-2002 Spherical Plain Bearings - Vocabulary (ISO 6811: 1998, IDT)
GB/T 4199-2003 Rolling Bearings - Tolerances - Definitions (ISO 1132-1: 2000, Rolling Bearings - Tolerances - Part 1: Terms and Definitions, MOD)
GB/T 7811-2007 Rolling Bearings - Symbols for Quantities (ISO 15241: 2001, IDT)
JB/T 8565-1997 Spherical Plain Bearings - Dynamic Load Ratings Life
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Test Classification
6 Test Conditions
6.1 Tester
6.2 Shaft and Housing Hole Fitted with the Spherical Plain Bearings
6.3 Lubrication of Spherical Plain Bearings
6.4 Selection and Calculation for Load Applied During the Test, Sliding Velocity and Bearing Life
6.5 Initial Lubrication Life of Spherical Plain Bearing under Normal Stress
7 Test Preparation
7.1 Preparation of Test Pieces
7.2 Installation
8 Test Procedures
8.1 Start-up, Shutdown, Loading and Lubrication Procedures of the Tester
8.2 Test Monitoring
8.3 Failure Judgment
9 Test Result Analysis and Test Report
Table 1 Tolerance Zone of Shaft and Housing Hole Fitted with Spherical Plain Bearings
Table 2 Load Coefficient KC
Table 3 pv
Table 4 Failure Judgment
Table 5 Calculation of Distribution Parameter Estimates , and and Characteristic Life
