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Roller bearings

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Image
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
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270072
EISBN: 978-1-62708-301-0
... alignment of the assembly. It was suggested that the state of damage to the roller bearings be examined to confirm this. Background The starboard main wheel bearing housing of an aircraft failed after 298.10 hours of flight in which the aircraft had made 403 landings. The hub of the wheel had broken...
Image
Published: 30 April 2021
Fig. 14.11 Schematic of an air bearing on a conveyor roller 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
... 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300047
EISBN: 978-1-62708-323-2
... was experiencing vibration problems and the investigators declared that the vibration problems were coming from the very large roller thrust bearing that supported the upper portion of the machine. The problem was addressed by replacing the rolling element bearing with a lubricated steel on bronze thrust bearing...
Image
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: 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...
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...
Image
Published: 01 June 1985
Fig. 5-37. Spur gear, 3×. Tooth bending fatigue with origin from a crack at both root radii caused by the enmeshing of a portion of a needle bearing roller. More
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370021
EISBN: 978-1-62708-447-5
... the roller and the base plate ( Ref 3 , 4 ). Each wheel is mounted on two roller bearings, which are completely shielded and permanently lubricated ( Ref 5 ). The plows are lined with tungsten carbide tips to withstand the abrasive wear of the sand. The cylindrical bottom is designed with austenitic...
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: 01 June 1985
DOI: 10.31399/asm.tb.sagf.t63420027
EISBN: 978-1-62708-452-9
... or power train equipment there are vibrations. Even the smoothest source of power will generate an output in pulses. Roller bearings vibrate; gear teeth vibrate; rotating shafts vibrate. Each part vibrates in its own peculiar amplitude and frequency. There is usually no problem unless one or more add...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 March 2024
DOI: 10.31399/asm.tb.gvar.t59360051
EISBN: 978-1-62708-435-2
... remain within the desired range, high-quality roller bearings (Annular Bearing Engineering Committee, or ABEC, 5) and helical gears were used. In addition, ductile iron with a high vibration-damping capacity was selected for the housing casting. Initially, one gearbox was assembled. Vibration Testing...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300079
EISBN: 978-1-62708-323-2
... by adhesive transfer between surfaces, then with repeated rubbing, transferred material or plastically deformed material fractures and wear particles or debris are generated. Some rubbing couples produce a fine powder-like debris, some produce flake-like particles. Many rubbers produce rollers —cylinders...
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 September 2011
DOI: 10.31399/asm.tb.cfw.t52860081
EISBN: 978-1-62708-338-6
...-drive systems, and graphite shafts will be used for both. Fig. 7.17 Expeditionary Fighting Vehicle propulsion couplings Representative composite rollers and idlers are shown in Fig. 7.18 . All are used for many different applications. A wide range of capabilities is provided by composite...
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
... to operate with area contact, but because of bearing clearance, the contact is line; of course, ball and roller bearings have roll + slide motion and point contact/area contact; flat ways on machines and plain thrust bearings have area contact. Thus, it is possible to categorize the contact in a tribosystem...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1985
DOI: 10.31399/asm.tb.sagf.t63420001
EISBN: 978-1-62708-452-9
... the grinding operation. A freely rotating bore requires a good lubricating film, or seizing and galling may result. The bore used as a bearing outer race must be as hard as any standard roller bearing surface and is subject to all conditions of rolling contact, including fatigue, pitting, spalling, and galling...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300013
EISBN: 978-1-62708-323-2
... contact tribosystems. Balls rolling in races may be the most important example of a rolling tribosystem and an important concept to consider in ball and roller bearings if true rolling exists. Pure rolling only exists when there is no sliding velocity difference or slip between the contacting...