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antifriction bearing

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Published: 01 December 2003
Fig. 14 Wear marks on the surface of a nylon/polyethylene antifriction bearing. The bearing was in contact with a rotating steel shaft. 417×. Source: Ref 53 More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
... with this configuration are gear teeth and various types of antifriction bearings. However, the same type of failure can occur where a convex shape fits within a concave shape, such as a shaft within a sliding bearing or balls in a ball-bearing race. These situations are shown in Fig. 1 . In these configurations...
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
... 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 subsequently...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780267
EISBN: 978-1-62708-281-5
... characteristics of nylon 12. Failure Examples <xref rid="t69780267-ref52" ref-type="bibr">(Ref 52)</xref> Example 1: Wear Failure of an Antifriction Bearing Shown in Fig. 14 is the worn surface of an antifriction bearing made from a nylon/PE blend. The bearing was worn in contact with a steel shaft...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360083
EISBN: 978-1-62708-435-2
... amplitude drops instantly when power is turned off, the cause is electrical. Many times rpm; usually 8000 to 25,000 cpm Bad bearings (antifriction) Erratic Erratic; many reference marks If amplitude exceeds 0.25 mil, suspect faulty bearings. rpm × number of gear teeth Gear noise Usually low...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360121
EISBN: 978-1-62708-435-2
... it increases damping. In some applications, ductile iron may be considered. Bearings The parameters for bearings are: For fluid-film bearings, use a sleeve or tilt-pad type, possibly with five pads. Include a pressure dam in either type of bearing. Antifriction ball or roller bearings...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630169
EISBN: 978-1-62708-270-9
... 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 that are subject...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360051
EISBN: 978-1-62708-435-2
... located at increments of plus and minus the running speed are characteristic of antifriction rolling-element bearing defects. Fig. 3.3 Spectrum resulting from a single defect in the outer race of a bearing. The side bands at running speed are characteristic of bearing defects. Consider next...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360001
EISBN: 978-1-62708-435-2
... gears. To avoid high helix angles, double helical gears ( Fig. 1.11 ) are preferred and are more effective in reducing vibration. Double helical gears also eliminate axial thrust, which allows the use of antifriction ball or roller bearings. Fig. 1.11 Advantages and disadvantages of double...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630001
EISBN: 978-1-62708-270-9
... elements, such as balls, rollers, and needles in antifriction bearings, may leave indentations on the raceways that can aid in identifying the direction of the forces that caused the damage. Has the surface of the part been deformed by loading during service or by damage after fracture? The location...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.9781627084352
EISBN: 978-1-62708-435-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900193
EISBN: 978-1-62708-350-8
... antifrictional properties. The process patent stated that the gaseous atmosphere consisted of ammonia, with a hydrocarbon gas and other small amounts of carbon-containing gases ( Ref 3 ). An important study that contributed greatly to the scientific understanding of gas nitrocarburizing treatments...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.9781627082709
EISBN: 978-1-62708-270-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900219
EISBN: 978-1-62708-350-8
... produced on mild steel a porous layer that was claimed to have good antifrictional properties. The published patent revealed that the gaseous atmosphere consisted of ammonia and hydrocarbon or other carbon-containing gases of unspecified proportions and that the treatment was undertaken in the temperature...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630081
EISBN: 978-1-62708-270-9
...). These terms, brittle and ductile , are opposites, like black and white. For many parts it is desirable to have metal properties that are predominantly hard, strong, and wear resistant, accepting the accompanying brittleness. Examples are gear teeth, antifriction bearings, and various types of cutting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... thickness is great enough to prevent significant asperity interaction. This pitting occurs in high-speed power gearing and in aerospace power drives. It is also typical in antifriction bearings (which operate with pure rolling as at the pitch diameter on spur gears). The origin is typically a nonmetallic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... bearings have surface deformation comparable to or exceeding the lubricant film thickness. Therefore, elastohydrodynamic (EHD) lubrication is extremely important in determining friction and wear in many mechanical components and will be emphasized throughout this chapter (see, for example, the section...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140007
EISBN: 978-1-62708-335-5
... Aluminum-Tin Tin is the major alloying element in compositions developed for bearing applications. It has also been employed with bismuth, lead, and cadmium at lower concentrations to provide free-machining properties. The 850-series alloys can often be substituted for 660 or similar bronzes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440125
EISBN: 978-1-62708-262-4
... steels are specialty steels uniquely suited for certain applications. For instance, 52100 is used almost exclusively for antifriction bearings, and the 9200 series alloys are used for springs and applications where shock resistance is a factor. In most instances, however, a single composition of steel...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630281
EISBN: 978-1-62708-270-9
... ridges. r raceway. The tracks or channels on which roll the balls or rollers in an antifriction rolling-element bearing. The inner race fits around a shaft, while the outer race fits within a hole in a larger part. radial. In the direction of a radius between the center and the surface of a circle...