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Needle bearings

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Published: 30 November 2013
Fig. 1 (a) Sketch of counterformal, or convex, surfaces in contact; examples are gear teeth and roller or needle bearings rolling on a shaft, in an inner raceway, or on a flat surface. (b) Sketch of conformal surfaces, where a convex surface is in contact with a concave surface; examples More
Image
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
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
..., or convex, surfaces in contact; examples are gear teeth and roller or needle bearings rolling on a shaft, in an inner raceway, or on a flat surface. (b) Sketch of conformal surfaces, where a convex surface is in contact with a concave surface; examples are ball bearings in contact with an inner or outer...
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
... be extremely high. 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780267
EISBN: 978-1-62708-281-5
... is redrawn in Fig. 6 . In order to model abrasive action of asperities on elastomers, several tests using sharp needles have also been carried out in the past. The process of wear by a sharp needle or an asperity is schematically shown in Fig. 7 . Although there are a number of models available...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300047
EISBN: 978-1-62708-323-2
... an earthquake, but this has not progressed farther than demonstration. However, in many parts of the planet, public (even private) buildings must be designed to accommodate earthquakes. A common technique is to set the building on essentially flat pad bearings (usually of a polymer, like PTFE). These bearing...
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
... versus the motor bearings); some have this plus a commutator/brush tribosystem. However, an internal combustion engine for a vehicle can contain a hundred or more tribosystems, all of which are subject to friction and wear concerns. Therefore, advantages of electric vehicles propelled by one to four...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250293
EISBN: 978-1-62708-345-4
... considerably: A round bore, closely toleranced and ground, may rotate freely around a ground shaft diameter, rotate tightly against a ground diameter by having a press fit, or be the outer race of a needle bearing that gives freedom of rotation. Each application has unique problems. A ground bore is always...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140021
EISBN: 978-1-62708-264-8
... that Fig. 4.20 is a two-dimensional cut through the structure. If the bainite growth front were really needle shaped, the needle shape would be apparent only if the cut were to lie parallel to the needle axes, which is unlikely. However, if the growth front were plate shaped, it would look like needles...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610263
EISBN: 978-1-62708-303-4
... provisions in structural design specifications. In general, the important factors affecting the fatigue strength of mechanically fastened joints are clamping force, grip length, type of fastener, fastener material, fastener pattern, tension-shear ratio, tension-bearing ratio, and the type of materials being...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... the same skin dry. We could go on and cite the chronology of wheels and bearings, but the point to emphasize here is that tribology is part of nature and human activity. Tribology is indigenous to our planet, and people have always and will always use tribology to make life easier and better. 2.2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410001
EISBN: 978-1-62708-265-5
... is not as demanding. Atom Probe Tomography (APT) Atom Probe Tomography (APT) is a powerful technique now widely used to establish atomic level distributions of various types of atoms. Atoms are evaporated from thin needle-shaped specimens by pulsed electric fields or lasers, identified by differences in time...
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 August 2018
DOI: 10.31399/asm.tb.msisep.t59220519
EISBN: 978-1-62708-259-4
... in Chapter 9, “Conventional Heat Treatments—Usual Constituents and Their Formation,” in the section “ Upper and Lower Bainite ” in this book. 15.1.2 AISI 52100 Steel Steels containing around 1% C and 1.5% Cr (such as AISI 52100 or DIN 100Cr6) are widely used in bearings. A fully martensitic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240469
EISBN: 978-1-62708-251-8
..., and tin in the range of 0.1 to 10 wt%. Additional alloying elements are used to improve corrosion resistance and increase strength, especially high-temperature strength. Aluminum increases strength and improves the resistance to corrosion and oxidation. Iron and manganese improve bearing properties...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080067
EISBN: 978-1-62708-304-1
...-16Cr-9Co-3.5Ti-3.3Al-1.8Mo-1Nb-1.8Ta) at 700, 900, and 1100 °C (1290, 1650, and 2010 °F). Litz et al. ( Ref 20 ) observed internal titanium nitrides (needle shape) formed in front of internal aluminum oxides that formed underneath the external oxide scales. In an oxidation study of alloy 800HT (Fe-21Cr...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300179
EISBN: 978-1-62708-323-2
... in a carbon steel is martensite, a body-centered tetragonal (bct) atomic structure that appears needle-like under optical microscopy. Special heat treatment called austempering can make steels have a bainitic microstructure that is not as soft as ferrite and not as hard as martensite. Bainitic microstructures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190vii
EISBN: 978-1-62708-296-9
... ). Fig. 2 Formation of cast part properties: factors of macro- and microscale parameters A cast part of a technical alloy is built of particular crystallites (grains) of condensed phases—that is, solid solutions, intermetallic phases, and nonmetallic inclusions. This internal construction bears...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770099
EISBN: 978-1-62708-337-9
.... A point to bear in mind is that as the grain size increases, the impact transition temperature increases. The effect of grain size in relation to the impact strength of a plain-carbon steel in the normalized condition is shown in Fig. 5.11 . The same trends apply to case-hardening steels in the blank...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060175
EISBN: 978-1-62708-261-7
... from cars to appliances Wire, used in such products as bed springs, wire rope, nails, and wire fabric Structural shapes used in buildings and bridges Bars for forgings and machined parts, such as gears and bearings Steels powders are also produced for various applications, including...