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Ball bearings

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Published: 01 October 2005
Fig. CH14.5 Microstructure of the damaged ball bearings showing resolved pearlite and spheroidal carbide. Nital etch More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270197
EISBN: 978-1-62708-301-0
... Abstract One of the rotor bearings in an electric motor failed, producing excessive vibrate. The bearing was removed and disassembled, revealing craters and bruises on the inner ring raceway and balls along with evidence of melting and burning of metal. Scanning electron microscopy revealed...
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Published: 01 March 2006
Fig. 11.4 Fatigue strength of ball bearing steel ShKh15 as a function of inclusion content. Source: Ref 11.9 More
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Published: 01 March 2006
Fig. 11.73 Residual stress in prenitrided and shot-peened ball bearing inner rings. Source: Ref 11.80 More
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Published: 01 March 2006
Fig. 11.22 Bearing life at various values of differential hardness between balls and races, (radially loaded, 207 size ball bearings). Source: Ref 11.11 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270095
EISBN: 978-1-62708-301-0
... Abstract A pair of bearings mounted side by side in an aircraft engine failed in service. Photographs show that the inner rings were either broken or deformed, the balls were worn and flattened, and the cages severely damaged. The bearing races were damaged as well, but only on one side...
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Published: 01 October 2011
Fig. 16.10 Typical morphology of fatigue spall in rolling-element bearings. (a) Fatigue spall centered on a ball bearing raceway. (b) Fatigue spall on 12.7 mm (0.5 in.) diameter steel ball obtained using rolling four-ball machine. Source: Ref 16.3 More
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Published: 01 March 2006
Fig. 11.23 Bearing fatigue scatter (indicated by ratio of B 50 life to B 10 life) for various values of differential hardness between balls and races (radially loaded, 207 size ball bearings). Source: Ref 11.11 More
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Published: 01 October 2005
Fig. CH14.1 Severely damaged bearing parts. Note the broken inner ring and the severely rubbed ball bearing. More
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Published: 30 November 2013
are ball bearings in contact with an inner or outer raceway, roller or needle bearings in contact with an outer raceway, and a shaft in contact with a sliding bearing or on a flat surface. More
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Published: 01 November 2012
Fig. 15 (a) Sketch of counterformal, or convex, surfaces in contact; examples are gear teeth and roller or needle bearings rolling on a shaft, an inner raceway, or a flat surface. (b) Sketch of conformal surfaces, where a convex surface is in contact with a concave surface; examples are ball More
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Published: 01 December 1999
Fig. 5.45 Effect of number of large oxide inclusions on the flaking of rig-tested bearings (1309 outer rings). Through-hardened steel for ball bearings; composition, 1C, 0.5Mn, 1.5Cr. Source: Ref 60 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270097
EISBN: 978-1-62708-301-0
... bearing; B and C, parts of inner bearing; D, wavy washer; E, retaining plate; and F, shim This inner bearing was disassembled for further examination. The inner race of this bearing showed excessive brinelling ( Fig. CH15.2 ). Metal flow can also be seen in this figure. The corresponding ball...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300047
EISBN: 978-1-62708-323-2
... friction is lower than sliding friction. The most important device that allows rolling to occur are rolling element bearings, balls, and rollers—they move the world. Our vehicles move on roller wheel bearings; high speed motors employ ball bearings; aircraft engines require rolling element bearings...
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Published: 01 September 2008
Fig. 16 Rough schematic of stresses in contact loading of a bearing ball on a race More
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Published: 01 March 2006
Fig. 5.5 Ball or roller bearing on flat surface showing general 3-D state of stress below the surface More
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Published: 01 October 2005
Fig. CH15.3 One of the balls of the inner bearing showing excessive wear More
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Published: 01 October 2005
Fig. CH55.4 Craters seen on one of the bearing balls More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... Friction The types of sliding friction shown in Fig. 2.2 also apply to rolling friction. Clean metal balls in a ball bearing can roll on each other. They can roll separated by a fluid as in lubricated ball bearings; open ball bearings can operate in a dusty environment, in which case...
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Published: 01 October 2005
Fig. CH55.2 The bearing in the dismantled condition showing the inner and outer ring raceways, the split cage, and the bearing balls More