1-20 of 539 Search Results for

rolling contact bearing-life test

Sort by
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002373
EISBN: 978-1-62708-193-1
... Abstract Contact fatigue is a surface-pitting-type failure commonly found in ball or roller bearings. This article discusses the mechanisms of contact fatigue found in gears, cams, valves, rails, and gear couplings. It discusses the statistical analysis of rolling contact bearing-life tests...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... Subsurface stress under rolling contact Bearing Life Prediction The life prediction of rolling-element bearings is based on a statistical analysis of bearing tests performed in a controlled environment (e.g., full-film lubrication, dust free). Given that the material properties and cleanliness...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002376
EISBN: 978-1-62708-193-1
... bearings ROLLING ELEMENT FATIGUE has been recognized since the turn of the century, with fatigue life testing beginning in the early 1900s by rolling bearing manufacturers. Because of the high stresses imposed on bearings, steel with a hard matrix was required. However, the hard matrix, along...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006393
EISBN: 978-1-62708-192-4
... fatigue damage relative to steels manufactured using other processes. Fig. 2 Effect of total length of inclusion stringers on the rolling-contact fatigue life of a 220 mm (8.7 in.) bore tapered roller bearing inner race as a function of steel cleanliness. Source: Ref 18 Concentrated Contacts...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003326
EISBN: 978-1-62708-176-4
... of Stresses in Rolling-Contact Elements , J. Lubr.Technol. , Oct 1967 , p 453 – 465 • Morrow J. , Correlation of the Pitting Fatigue Life of Bearings with Rolling Contact Rig Data , JBE (Trans. ASME) , Sept 1966 , p 583 – 588 • Greenert W.J. , The Toroid Contact Roller Test...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... risers or to the geometry and kinematics of the contacting pair. Figure 2 summarizes a list of these stress risers, which have been the subject of numerous scientific investigations that have resulted in the improved life of rolling-element bearings ( Ref 11 ). With the introduction of cleaner steels...
Book Chapter

Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006358
EISBN: 978-1-62708-192-4
... if there is an overload on the contact surfaces. In summary, there generally are three types of gear wear: normal or polishing wear, moderate wear that is not necessarily destructive to gear life, and destructive wear. Rolling-Element Bearings As with gears, pitting, smearing, and spalling are important RCW...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006426
EISBN: 978-1-62708-192-4
... at comparable temperatures. Cronidur 30 has improved rolling-contact fatigue life in both full and boundary lubrication and under boundary lubrication with artificial indentations compared with type 440C and other bearing alloys. XD15NW has improved fatigue life compared with type 440C when tested under...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
... rotate in a race driven by the upper ball, thus simulating the rolling and sliding produced in angular-contact ball bearings. This five-ball machine has been used to investigate the fatigue life of high-speed ball bearings with hot pressed silicon nitride balls ( Ref 42 , 43 ). Fig. 3 Loading...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002401
EISBN: 978-1-62708-193-1
... damaged by GSC macropitting. The GSC macropits can propagate more rapidly in either direction—parallel or transverse to the rolling direction. This mode of contact fatigue is more frequently observed in life tests accelerated due to overload conditions, because contact geometry is designed to produce...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... of temperature, or contamination, will reduce life expectancy and may cause a type of failure other than by rolling-contact fatigue. The life of a bearing is expressed as the number of revolutions, or the number of hours at a given speed, a bearing will complete before developing fatigue spalling. Life may...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... bearings are also explained. Finally, the article discusses in detail the characteristics and prevention of the various types of failures of REBs: wear, fretting, corrosion, plastic flow, rolling-contact fatigue, and damage. The article includes an Appendix, which lists REB-related abbreviations...
Book Chapter

By Rob Bosman
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006381
EISBN: 978-1-62708-192-4
... H. , and Roth C. , The ROF+ Methodology for Grease Life Testing , ELGI EuroGrease , Dec 2011 , p 31 – 40 20. SKF Rolling Bearings Catalogue , SKF , 2012 21. Booser E.R. , Grease Life Forecast for Ball Bearings , Lubr. Eng. , 1974 , p 15 22. Cyriac F...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001024
EISBN: 978-1-62708-161-0
... treatment, the single most important factor in achieving high levels of rolling-contact fatigue life in bearings is the cleanliness, or freedom from harmful nonmetallic inclusions, of the steel. Alloy conservation and a more consistent heat-treating response are benefits of using specially designed bearing...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006407
EISBN: 978-1-62708-192-4
...: Lubrication of the sliding contact between the retainer and other bearing components Elastohydrodynamic lubrication of all true rolling contacts Lubrication in that part of the contact between the raceways and the rolling elements not represented by true rolling Other functions of the lubricant...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005978
EISBN: 978-1-62708-168-9
... constituents serve as points of weakness in the martensitic matrix, making them objectionable in a bearing steel. Inhomogeneities such as nonmetallic inclusions and voids, and constituents like upper bainite reduce rolling contact fatigue life of through-hardening bearing steels. Fig. 8 A cooling time...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006403
EISBN: 978-1-62708-192-4
... generated by sliding wear. This condition exists in gear teeth contacts at or near the pitch point and in all contacts between raceway/ball or raceway/roller contacts of rolling-element bearings. Surface or subsurface fatigue is the predominant mode of failure. Surface fatigue life improves greatly...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006354
EISBN: 978-1-62708-192-4
... to Hertzian stress high enough to cause permanent plastic deformation of the contacting surfaces. It is characterized by permanent deformation (without loss of material or change of surface texture), which can occur during a single load event. For example, true brinelling of a rolling element bearing...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.9781627081924
EISBN: 978-1-62708-192-4
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006377
EISBN: 978-1-62708-192-4
... Abstract Transition metal dichalcogenides (TMD) are solid lubricant materials, specifically, intrinsic solid lubricants, whose crystal structure facilitates interfacial sliding/shear to achieve low friction and wear in sliding contacts and low torque in rolling contacts. This article provides...