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Bearing races

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Image
Published: 01 December 1993
Fig. 3 Pitch control thrust bearing races, showing signs of overheating and plastic deformation. (a) Inner races, as exposed. (b) Outer races, as exposed More
Image
Published: 01 December 1993
Fig. 8 Micrographs of sections of the bearing races. Smearing and changes in the microstructure are evident at the ball path surfaces and at the inner diameter of the inner race. White layers are untempered martensite; black layers are tempered martensite. (a)Inner race. 11.5×. (b) Outer race More
Image
Published: 01 December 2019
Fig. 7 Inner surface of the bearing race ( a ) scoring marks and ( b ) same features in the cross section revealing material stock dislodged from shaft and stuck to inner surface of bearing More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0091897
EISBN: 978-1-62708-236-5
..., hardness testing, and microscopic exam) supported the conclusion that shaft failure was initiated by fretting between the bearing race and the bearing surface on the shaft because of improper bearing installation. Once clearance was established between the bearing and the shaft, the shaft began pounding...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001799
EISBN: 978-1-62708-241-9
... magnification Fig. 1 Schematic diagram and photographs of the failed component with fractured surfaces Fig. 2 Photograph of the inner race ‘A’ of the bearing showing pressing marks of the rollers Fig. 3 River marks ( a ) showing crack direction from primary origin and ( b ) showing...
Image
Published: 01 December 1993
Fig. 5 Pitch control thrust bearing outer races in housing held by retaining nut. Note metal welded to the retaining nut and the ball welded to the outer race. 1.09× More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001363
EISBN: 978-1-62708-215-0
... by excessive heating, causing cage disintegration, plastic flow of the races and balls, and eventual separation of inner and outer races. It was recommended that the bearing set be resized to accommodate the large thrust as and that a thermocouple be added to monitor the condition of the bearing during testing...
Image
Published: 01 December 2019
Fig. 6 Shaft portion showing concentric scoring on the surface under the bearing race More
Image
Published: 01 June 2019
Fig. 3 Various methods of reducing stress concentration at shoulder required for locating bearing races, etc. More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001361
EISBN: 978-1-62708-215-0
... of the body. This assembly condition generated abnormal high loads on the swaged edges, ultimately resulting in fatigue failure. To prevent a recurrence of similar failure in the future, the dimensions of the race in the spherical bearing were changed, no further failure occurred. Bearing races...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001467
EISBN: 978-1-62708-224-2
... for the fracture to be dish-shaped, the plane of fracture turning inwards toward the section having the larger diameter. Fig. 2 View of other portion of fractured shaft. It is a matter of common experience to find that changes in diameter to accommodate bearings, particularly the inner races...
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
... striations indicative of fatigue, and EDS analyses corroborated a high incidence of silicate inclusions at crack sites. The study suggests that the failure of the bearing occurred because the hardness difference between the roller bearing and the inner-race surfaces resulted in wear of the inner-race...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047975
EISBN: 978-1-62708-225-9
... by contact fatigue mechanism (flaking) activated by the subsurface nonmetallic inclusions. Aircraft components Bearing races Flaking Transmissions (sutomotive) Bearing steel Fatigue fracture Rolling-contact wear The pilot of an aircraft reported illumination of the transmission oil-pressure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001485
EISBN: 978-1-62708-225-9
...) and the races and, although the resulting stresses may appear to be compressive, they are associated with tensile and shear stresses just below the surface, and repetitions due to rotation of the bearing ultimately lead to the initiation of fatigue cracks, and fragments of metal become detached to give...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047986
EISBN: 978-1-62708-217-4
... examination of circumferential section of the largest cavity, was exhibited by the second bearing. It was concluded that the fracture of the cage was caused by overheating and misalignment caused excessive stressing of the bearing on the main shaft. Bearing races Gas turbine engines Overheating...
Image
Published: 01 June 2019
Fig. 1 Sections taken from spherical bearing inner race. The cyclic nature of the wear is easily discernable (a). Due to the loss of bearing conformity the wear progressed into severe coarse grain spalling (b). More
Image
Published: 01 June 2019
Fig. 19 “Flutting” of outer race of roller bearing. More
Image
Published: 01 June 2019
Fig. 20 “Flutting” of outer race of ball bearing. More
Image
Published: 01 December 2019
Fig. 2 Photograph of the inner race ‘A’ of the bearing showing pressing marks of the rollers More
Image
Published: 01 December 2019
Fig. 4 Close-up view of the bearing outer race. Note the slight lipcurling on the raceway shoulder (red arrow) (Color figure online) More