Aerospace series. Bearings, airframe rolling. Double row self-aligning ball bearings with flanged outer ring in corrosion resisting steel, reduced internal radial clearance. Dimensions and loads

2007 ◽  
Keyword(s):  
Outer Ring ◽  
Radial Clearance ◽  
Ball Bearings ◽  
Double Row

Dynamic Measurement of Bearing Radial Clearances

2005 ◽  
Vol 295-296 ◽  
pp. 361-366 ◽  
Author(s):  
Yu Xue Chen ◽  
S.N. Yang
Keyword(s):  
Measurement Accuracy ◽  
Systematic Errors ◽  
Dynamic Measurement ◽  
Outer Ring ◽  
Radial Clearance ◽  
Test Time ◽  
Ball Bearings ◽  
Test Results ◽  
Accuracy Measures

Outer ring tilted or offset axially, caused by improperly fixing relatively to the inner ring, will produce remarkable systematic errors in measured radial clearance of a bearing. Analyzing their effects in detail on the results of measured radial clearances, they are found to be the main sources affecting the measurement accuracy. Measures for removing them are proposed. Based on these, a novel type of instrument for measurement of radial clearances of ball bearings has been developed. It could avoid the two kinds of systematic errors. The measuring principle, structures and working procedures of the instrument are presented. Test results show that the test time is less than 15 seconds per a part and the indication stability is between ±1.0 µm.

IP Dynamic Anti-Rust Test, Lubricating Greases

1969 ◽  
Vol 184 (6) ◽  
pp. 23-31
Author(s):  
F. E. H. Spicer
Keyword(s):  
Performance Level ◽  
Test Method ◽  
European Countries ◽  
Distilled Water ◽  
Ball Bearings ◽  
Double Row ◽  
Performance Levels ◽  
Good Protection ◽  
Intermediate Performance

The Institute of Petroleum has recently published a test method (IP 220/67) for assessing the rust-prevention characteristics of greases. Specially selected and preserved double-row, self-aligning ball bearings are used as test specimens. The test, which lasts for 164 1/2 h, is dynamic, the grease film being produced and part of the test being performed with the bearings rotating partially submerged in distilled water. The performance of the grease is assessed by estimating the area of rust on the outer races of the test bearings. The precision of the test method was established by an extensive international correlation programme involving 30 laboratories from five European countries. This showed a precision which varied according to the performance level of the test greases. The results of tests with greases affording very good protection and with greases affording very poor protection against rusting gave better precision than results from greases with intermediate performance levels.

Analysis of Fatigue of Cylindrical Roller Bearing in Printing Press

2013 ◽  
Vol 312 ◽  
pp. 25-28
Author(s):  
Ji Mei Wu ◽  
Yan Chen ◽  
Bo Gao ◽  
Tuan Yong Yi
Keyword(s):  
Fatigue Life ◽  
Roller Bearing ◽  
Flow Chart ◽  
Printing Press ◽  
Radial Clearance ◽  
Radial Load ◽  
Double Row ◽  
Rotating Speed ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

By means of considering improved Lundberg-Palmgren (L-P) fatigue life theory and rollers and other comprehensive factors, a model of fatigue life is setup for eccentric double row cylindrical roller bearing under rotation. On this basis, the calculation flow chart is given and the fatigue life is calculated. Then come to the conclusions that the fatigue life of bearing is influenced by radial load, rotating speed, radial clearance.

Sign in / Sign up

Export Citation Format

Share Document