Advanced Concepts of Bearing Technology

Harris, T. A.; Kotzalas, Michael N.

doi:10.1201/9781420006582

Cited by 481 publications

(382 citation statements)

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“…Due to the cage's mass, eccentricity, and rotational speed it is pressed against the outer ring guiding land with the centrifugal force F C c (Eq. [2]). According to Coulomb's law of friction, the resulting friction force F C−OR f can be calculated with the friction coefficient μ C−OR (Eq.…”

Section: Theory and Calculationsmentioning

confidence: 93%

Cage Friction in High-Speed Spindle Bearings

Brecher

Hassis

Rossaint

2013

Tribology Transactions

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Friction-induced heat is one of the main reasons for the upper speed limit of high-speed angular contact ball bearings (spindle bearings). One source of friction inside the bearing is the cage. In this article, it is shown through experimental results that the frictional losses due to the cage are of significant magnitude. Based on measurements, a new, simple calculation model is proposed to estimate the cage induced frictional losses in spindle bearings under high rotational speed with minimal lubrication. The cage is assumed to rotate eccentrically around the bearing's axis and to be in contact with the outer ring at just one position. One single ball at the same position is assumed to drive the cage. Thereby, the friction between the cage and the outer ring is transformed in a breaking torque for the inner ring and the shaft. Both the cage outer ring contact and the ball cage contact are handled according to Coulomb's law of friction. Despite its simplicity, this model shows a close correlation with experimental results. Consideration of the centrifugal and thermal expansion provides insight into the relation between cage clearance and cage friction and hence allows for the development of new cage designs. Finally, the design and experimental results of optimized cages made of polyether ether ketone (PEEK) are presented.

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Section: Theory and Calculationsmentioning

confidence: 93%

Cage Friction in High-Speed Spindle Bearings

Brecher

Hassis

Rossaint

2013

Tribology Transactions

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“…However, since the rollers enter and exit the loaded zone continuously because of the high rotating speed, an average contact area was applied to all 21 rollers in each column. The contact area between rollers and rings or between roller large end and rib of inner ring can be estimated using the Hertz contact theory [28,29]. The FEM model, seen in Fig.…”

Section: Temperature Field Analysis Of Dtrbmentioning

confidence: 99%

Theoretical and experimental investigation on the thermal characteristics of double-row tapered roller bearings of high speed locomotive

Yan

Ning

Zhai

et al. 2015

International Journal of Heat and Mass Transfer

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“…The structural loop consists of the spindle shaft, the bearings, the housing, guideways and frame, drives, tool and workholding fixtures [4]. Friction influences some significant characteristics of machine tools, such as their accuracy, energy efficiency, reliability and length of service, especially for high speed machines [5,6]. Wear resistance and low friction to avoid gripping, stick-slip phenomena and aging of the surfaces are one of the functional requirements for longitudinal guides [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Friction influences some significant characteristics of machine tools, such as their accuracy, energy efficiency, reliability and length of service, especially for high speed machines [5,6]. Wear resistance and low friction to avoid gripping, stick-slip phenomena and aging of the surfaces are one of the functional requirements for longitudinal guides [6,7]. Furthermore, consuming little electricity and reducing coolant use are some of the important requirements for today's industry [9].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Stick-Slip Phenomenon and Friction Characteristics of Linear Guides

Rahmani

Krall

Bleicher

2015

Procedia Engineering

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In the present study, we investigate the stick-slip phenomenon and friction behaviour of industrial ball bearing linear guides to get some precise and comprehensive data on this matter. As friction influences some important characteristics of machine tools and the provided data from the manufacturer's catalogue do not cover all the details of various working conditions, it is essential to investigate it thoroughly. Translational guides with various preloads and under different external loads and running velocities are experimentally investigated. Afterwards, to provide a more practical condition, a slide is mounted on four carriages, and the same experiments are conducted. Finally, the friction force-time diagrams and also the friction coefficients are compared and evaluated for different working conditions.

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Advanced Concepts of Bearing Technology

Cited by 481 publications

References 0 publications

Cage Friction in High-Speed Spindle Bearings

Cage Friction in High-Speed Spindle Bearings

Theoretical and experimental investigation on the thermal characteristics of double-row tapered roller bearings of high speed locomotive

Experimental Investigations on Stick-Slip Phenomenon and Friction Characteristics of Linear Guides

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