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rolling-element bearings failures

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
... of hardened steel gears, rolling-element bearings, roller cams, and other parts or assemblies where there is a combination of rolling and sliding motion. The parts subject to wear fatigue failure generally have two convex, or counterformal, surfaces in contact under load. Typical components...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... oxidation. Fretting frequently occurs in stationary joints that are “fixed” from shrinking or pressing by interference fits or by bolts, pins, rivets, or other mechanisms, and also at the various contact points in antifriction, or rolling element, bearings. This means that nonrotating antifriction bearings...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300391
EISBN: 978-1-62708-323-2
... seconds (centiStokes, or cSt) The mathematical description of viscosity is: η = T d v / d t where η is viscosity, T is shear stress, d is density, v is velocity, and t is an element of thickness perpendicular to the oil flow. There is also a kinematic viscosity property (V...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060175
EISBN: 978-1-62708-261-7
...Abstract Abstract This chapter describes the classification of steels and the various compositional categories of commercial steel products. It explains how different alloying elements affect the properties of carbon and low-alloys steels and discusses strength, toughness, and corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... because the balls do not even touch the races. A well-designed electric motor with rolling element bearings can last 50 years or more. Rolling element bearings with proper lubrication at operating speed typically have coefficients of friction less than 0.1. However, at starting and shut down...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.9781627083232
EISBN: 978-1-62708-323-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610263
EISBN: 978-1-62708-303-4
... thread contact surfaces, friction between bearing face of turning element (nut or bolt head), and so on. A more exact torque-bolt tension relation for estimating purposes is shown in Fig. 6 . However, in order for tension to be developed, the torque applied to a fastener must overcome friction under...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... by transients in coefficient of friction, wear rate, or both, that are uncharacteristic of the long-term behavior of the given tribological system. Gears appear less sensitive to the consequences of surface distress than rolling-element bearings. This may be due to the greater ductility of lower-hardness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270197
EISBN: 978-1-62708-301-0
... such as electric motor, there is a possibility of the current passing through the bearings. When the current is broken at the contact surfaces between raceways and rolling elements, arcing or sparking occurs, producing high temperatures and localized damage. It is known that electrical discharges result from...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140055
EISBN: 978-1-62708-264-8
...Abstract Abstract Steels contain a wide range of elements, including alloys as well as residual processing impurities. This chapter describes the chemical composition of low-alloy AISI steels, which are classified based on the amounts of chromium, molybdenum, and nickel they contain...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290207
EISBN: 978-1-62708-306-5
... Reference Book , Butterworth-Heinemann , 1993 10.1016/B978-0-08-052395-8.50013-8 8.7 Campbell F.C. , Chapter 14, Fatigue , Elements of Metallurgy and Engineering Alloys , ASM International , 2008 10.31399/asm.tb.emea.9781627082518 Selected References Selected References...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300121
EISBN: 978-1-62708-323-2
... used in an engine. The bearings similarly are tested, but the oils must withstand bench tests at an elevated temperature and 10,000 rpm in a rolling element bearing with heavy contact stresses, near the compressive strength of the bearing steel. Typically, only two out of ten candidate oils can qualify...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300079
EISBN: 978-1-62708-323-2
...Abstract Abstract This chapter covers common types of erosion, including droplet, slurry, cavitation, liquid impingement, gas flow, and solid particle erosion, and major types of wear, including abrasive, adhesive, lubricated, rolling, and impact wear. It also covers special cases...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630169
EISBN: 978-1-62708-270-9
..., or other mechanisms, and also at the various contact points in antifriction, or rolling-element, bearings. This means that nonrotating antifriction bearings that are subject to vibration over a period of time may have fretting wear wherever a ball or roller contacts a raceway under load. If the bearings...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... line there is appreciable sliding. Also, the geometric shape of bearings is simpler than that of toothed gears. This helps in both quality of fit and quality control of material. Another factor in comparing rolling element bearings to gears is probability of failure. Bearings are considered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250001
EISBN: 978-1-62708-345-4
... a start of subsurface failure. Fig. 22 Free-body diagram of maximum tensile and shear stress orientation on a surface element of a shaft in a torsional mode. Both maximums are at the surface. Stress is considered to be zero at the central axis. Source: Ref 2 A variety of cast irons, powder...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980195
EISBN: 978-1-62708-342-3
... are the main application for tin. Lead, silver, antimony, and copper are used as alloying elements. Special soft solders also contain cadmium and zinc. Aluminum is used as an alloying component for soft solders used to join aluminum alloys. Bearing metals based on tin contain antimony, copper, and lead...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870267
EISBN: 978-1-62708-344-7
... E.V. , The Changing Technology of Rolling-Element Bearings , Mach. Des. , Vol 38 , Oct 13 , 1966 , p 206 – 216 , 218 – 291 , and 222 – 223 11.12 Petch N.J. , The Fracture of Metals , Progress in Metal Physics , Vol 5 , Chalmers B. and King R.B. Ed., Pergamon...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630023
EISBN: 978-1-62708-270-9
.... The maximum shear stress approaches the surface interfaces because of the friction between the rolling/sliding elements. This distorts the bulges at the ends of each element, as shown in Fig. 6(b) , and fatigue failures are likely to be of surface origin. See Chapter 12, “Wear Failures—Fatigue...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770099
EISBN: 978-1-62708-337-9
... J.H. , A Comparison of Fracture Behaviour of Low Alloy Steel with Different Sizes of Carbide Particles , Metall. Mater. Trans. A , Vol 27 , July 1996 10.1007/BF02651940 28. Isokawa K. and Namiki K. , Effect of Alloying Elements on the Toughness of Carburised Steels , Denki...