Results 111 to 120 of about 736 (164)

Spontaneous crack healing in calcite reveals the influence of dynamic strain evolution and surface chemistry. [PDF]

Nat Commun
Devoe M, P Lisabeth H, Nakagawa S, Hao Z, Tamura N, Wenk HR.   +5 more
europepmc   +1 more source

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Ball motion in angular contact bearings

Tribology, 1968
Abstract The nature of the frictional forces and moments applied to an angular contact bearing ball is examined in terms of slip, pivoting, spin and precession. Experimental methods for determining these quantities are given, together with results which indicate that the ball is retainer-controlled for pivoting, and race-controlled for slip.
openaire   +2 more sources

Diagnosing Faults of Angular Contact Ball Bearing

Volume 3: Dynamic Systems and Controls, Symposium on Design and Analysis of Advanced Structures, and Tribology, 2006
This paper presents experimental results for diagnosing faults in angular contact ball bearing in rotating systems such as motors or space actuators that nowadays can be found in a variety of consumer products. Some measuring methods of torque in small motors have been summarized.
Ahmad Ghanbari, Sohrab Khanmohamadi, Ghasem Alizadeh, Mohsen Bahrami   +3 more
openaire   +1 more source

Ball Contact Locus in an Angular Contact Bearing

Journal of Lubrication Technology, 1983
The path of contact on the surface of a bearing ball is derived for pure spin and regular precession. Ball-race and ball-ball contacts are considered in a retainerless bearing. Track broadening and equatorial offset are found; quantitative experimental agreement is shown.
openaire   +1 more source

Fatigue Life Analysis for Angular Contact Ball Bearing with Angular Misalignment

Journal of the Korean Society for Precision Engineering, 2016
Angular misalignment has a significant effect on the characteristics of angular contact ball bearings (ACBBs). This paper presents an analysis of fatigue life for ACBBs subjected to angular misalignment. A simulation model is developed with de Mul’s bearing model and the ISO basic reference rating life model.
Gyu-Hyun Bae, Van-Canh Tong, Seong-Wook Hong   +2 more
openaire   +1 more source

Motion of a Ball in Angular-Contact Ball Bearing

A S L E Transactions, 1965
The author carried out an experimental investigation on the motion of a ball in an angular-contact ball bearing under thrust load by measuring change in magnetic flux induced by a magnetized ball. The observed data of the angular velocity of the ball and that of the cage were adequate for analyzing the kinematical condition in the bearing.
openaire   +1 more source

Ball Motion Perturbation in an Angular-Contact Ball Bearing

A S L E Transactions, 1982
Spectral analysis of changes in the angular velocity vector of a bearing ball can be used to follow changes in ball-lubricant-race coupling in starved operation. Simultaneous measurements of basic speed ratio confirm the changes up to and through a lubricant breakdown failure. Presented at the 36th Annual Meeting in Pittsburgh, Pennsylvania, May 11–14,
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Slip Measurement in an Angular Contact Ball Bearing

Journal of Lubrication Technology, 1983
An experimental method for ball-race slip measurement that includes a method for determining the geometry of an assembled bearing from easily and accurately measured parameters is presented herein. Slip measurements taken with four fluid lubricants are discussed in terms of quantity, structure, bulk properties, and degradation.
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Motion of Unbalanced Balls in High-Speed Angular Contact Ball Bearings

Journal of Tribology, 1990
This paper reports on an experimental study of the three-dimensional ball motion of an unbalanced ball in a 50-mm bore angular contact ball bearing operating at high speeds under axial loads. One bearing ball, which was unbalanced by making a small hole in it, was magnetized and the motion of the ball was determined using Hall-elements. The bearing was
H. Kawamura, K. Touma
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Precessional slip in an angular contact ball bearing

Wear, 1982
Abstract A previously reported ball precessional motion in an angular contact bearing is analyzed. Explicit forms for ball-race slip are given, both with and without precession. Slip and entrainment velocity at ball-ball contacts in a retainerless bearing are also given, also with and without precession.
openaire   +1 more source