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bearing properties

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001645
EISBN: 978-1-62708-232-7
... to provide the requisite surface hardness and desirable core properties. Through-hardened material such as SAE-52100 steel has been widely used in European bearing industry, while low-carbon-base carburizing steels such as SAE-8620 gained acceptance in the United States. The advantages of a carburized SAE...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001530
EISBN: 978-1-62708-225-9
... tin bronzes appear to be the workhorses in bearing and bushing applications. These alloys mainly derive their strength and hardness from tin while lead, being present as insoluble, soft second phase in the microstructure, provides good antifrictional properties. These alloys may also contain zinc...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0048592
EISBN: 978-1-62708-218-1
... fractured cap screws. It was found that the two cap screws failed in fatigue under service stresses. The three bearing caps and the universal-joint spider broke in a brittle manner. The properties of the material in the cap screws did not fulfill the specifications. The modified 1035 steel...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001828
EISBN: 978-1-62708-241-9
... the most severe thermal condition to simulate the events when the “cold” gland injection flows over the “hot” bearing surface, with temperatures of “cold” and “hot” bodies, as specified previously. This calculation was based on the assumption that the journal material properties (mechanical and chemical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
... as materials for rolling-contact bearing components show some practical advantages over traditional bearing steels. The properties of ceramics, specifically low density and high stiffness, are of most interest to gas turbine ( Ref 1 ) and machine tool manufacturers ( Ref 2 ). High hardness, low coefficient...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047860
EISBN: 978-1-62708-218-1
... originated. The crankshaft was made from a 1040 steel forging. The mechanical properties of the metal met the specifications. Conclusions The crankshaft failed in fatigue at the main-bearing and crankpin-bearing journals because of excessive segregation of sulfide inclusions, which acted as stress...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001377
EISBN: 978-1-62708-215-0
... Abstract Sudden and unexplained bearing cap bolt fractures were experienced with reduced-shank design bolts fabricated from 42 CrMo 4 steel, quenched and tempered to a nominal hardness of 38 to 40 HRC. Fractographic analysis provided evidence favoring stress-corrosion cracking as the operating...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... engineering. The article presents the nomenclature, numbering systems, and worldwide market of REBs as well as provides description of REBs as high-tech machine components. It discusses heat treatments, performance, and properties of bearing materials. The processes involved in the examination of failed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001040
EISBN: 978-1-62708-214-3
... specification M101. Specified mechanical properties were: ultimate tensile strength, 830 MPa (120 ksi) (min); yield strength, 690 MPa (100 ksi) (min); elongation, 15% (min). Specimen Selection Two sections of the failed axle, containing the fractured faces, were submitted for examination. Visual...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001755
EISBN: 978-1-62708-241-9
... be due to axial loading.[ 4 ] The material of the cage was silicon bronze with a silver coating on it. Silver coating is used to give good resistance to fretting and improves the bedding-in and running properties of harder bearing materials.[ 5 ] Balls The balls had the shoulder impression...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001831
EISBN: 978-1-62708-241-9
... and contact surfaces. Chemical and thermal properties of the bearing grease were also examined. The investigation revealed that the failure was caused by wear due to dry friction and impact, both of which worsened as a result of high-temperature degradation of the bearing grease. Fatigue cracks initiated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001533
EISBN: 978-1-62708-225-9
..., the type of failure is characteristic of sliding bearings and is a simultaneous and interrelated display of fatigue and wear processes. 5 3.2 Structure, Mechanical Properties, and Wear Resistance At present, there are data in the literature illustrating the fact that both fatigue strength 6...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... Subsurface stress under rolling contact Bearing Life Prediction The life prediction of rolling-element bearings is based on a statistical analysis of bearing tests performed in a controlled environment (e.g., full-film lubrication, dust free). Given that the material properties and cleanliness...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... the lubrication regime is either boundary or mixed). However, the full film lubrication generally seen in rolling-element bearings should prevent such damage, except at the start/stop of rolling motion. Similarly, plastic flow and bulk failure depend on the bulk thermal and mechanical properties of the bearing...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
... according to material construction as single-metal (solid), bimetal (two-layer), or trimetal (three-layer) bearings. These terms refer to the number of principal functional layers that are used. The use of two or three separate layers provides a means for developing property combinations that cannot...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001788
EISBN: 978-1-62708-241-9
... for flat extrusion die and account for bearing length, fillet radius, temperature, and strain rate. They were shown to provide useful information for the analysis and prevention of die failures. extrusion die fatigue failure die design tool steel cracking fractography strain rate H13 (hot-work...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001575
EISBN: 978-1-62708-217-4
... Abstract An oil scavenge pump was found to have failed when a protective shear neck fractured during the start of a jet engine. Visual inspection revealed that the driven gear in one of the bearing compartments was frozen as was the corresponding drive gear. Spacer wear and thermal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001487
EISBN: 978-1-62708-234-1
... minimised in some cases by appropriate modification of operating procedures to provide for preheating and cooling down at reduced rotational speeds but the trouble has been overcome by the use of hard-drawn, silver-bearing copper having better mechanical properties. The mechanism involved is considered...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0090988
EISBN: 978-1-62708-236-5
... Abstract A jack cylinder split open during simulated service testing. The intended internal test pressurization was reportedly analogous to typical service. The material and mechanical properties of the cylinder pipe were unknown, although subsequent testing showed that the pipe satisfied...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006837
EISBN: 978-1-62708-329-4
... Fig. 6 Derailment 2. Arrows indicate boundary of galling damage and fracture-initiation location Each axle stub was pressed out of the bearing bores, and samples were sectioned from the fracture surface at and away from the initiation site. Mechanical property samples were also removed...