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Thrust bearings

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0047964
EISBN: 978-1-62708-223-5
... Abstract Drastic reduction in the service life of a production gearbox was observed. Within the gearbox, the axial load on a bevel gear (8620 steel, OD 9.2 cm) was taken by a thrust-type roller bearing (3.8 cm ID, 5.6 cm OD) in which a ground surface on the back of the bevel gear served...
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
... the pitch control thrust bearing set, head bolts, hub fork, and actuator rod end, were examined in more detail The thrust bearing set (52100 steel) was identified as the probable source of the uncommanded pitch angle change. A complete failure analysis of the bearing indicated that failure was precipitated...
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Published: 30 August 2021
Fig. 1 Various sliding bearings. (a) Slide way. (b) Thrust bearing. (c) Cylindrical sliding bearing. (d) Spherical sliding bearing More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001076
EISBN: 978-1-62708-214-3
... Abstract The silver layer on a thrust bearing face experienced electrostatic discharge attack (the bombardment of an in-line series of individual sparks onto the soft bearing face), which destroyed the integrity of the bearing surface. The electrical attack appeared as scratches to the naked...
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Published: 01 January 2002
Fig. 5 Electrical wear on the surface of a thrust bearing from a steam turbine. The microscopic pitting is caused by sparking from electric current. Actual size More
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Published: 01 December 1992
Fig. 1 Thrust bearing face, showing overall damage. 0.33×. More
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Published: 30 August 2021
Fig. 12 Electrical wear on the surface of a thrust bearing from a steam turbine. The microscopic pitting is caused by sparking from electric current. Actual size More
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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
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Published: 01 December 1993
Fig. 4 Pitch control thrust bearing inner race housing. Note the discoloration and wear on the shoulder. 1× More
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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
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Published: 01 December 1993
Fig. 14 Quasi-stable configurations of the pitch control thrust bearing during failure as postulated from deformation patterns observed on the races and the blade pitch data. (a) Correct bearing set position (T > T-23 s). (b) Bearing set position after first slip (T-19 to T-5 s). (c More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001139
EISBN: 978-1-62708-221-1
... Abstract A truck-mounted hydraulic crane had a horizontal thrust bearing with one race attached to the truck and the other to the rotating crane. The outside race of the bearing was driven by a pinion gear, and it is through this mechanism that the crane body rotated about a vertical axis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047059
EISBN: 978-1-62708-217-4
... as a stop-off during carburizing of the offset, circular thrust-bearing surface surrounding the 16-mm (0.637-in.) diam hole. The bearing surface was case hardened to a depth of 0.05 to 0.1 mm (0.002 to 0.005 in.), then austempered to obtain a minimum hardness of 600 Knoop (1-kg, or 2.2-lb, load...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001045
EISBN: 978-1-62708-214-3
... Abstract A failure analysis was conducted on brass alloy 270 heat exchanger tubes that were pulled from a unit used to cool oil for the speed regulators and thrust bearings of a hydroelectric power plant. The tubes began to leak after approximately 5.5 years of service. Macrophotography...
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Published: 01 December 1993
Fig. 12 Acceptable combinations of thrust load and rev/min for the pitch control thrust bearing set. Also plotted are actual load and rev/min conditions experienced by the bearing set during operation. More
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Published: 30 August 2021
wear in a badly lubricated axial roller thrust bearing. (a, c) Source: Ref 24 More
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Published: 01 December 1993
Fig. 2 Schematic of the collective pitch control system, showing the thrust bearing set, control tube, and actuator More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001484
EISBN: 978-1-62708-229-7
... the thrust bearing and badly damaging the labyrinths and interstage gland rings. The thrust bearing was repaired and the turbine put back into service until such time as it could be dismantled and a detailed examination made. This examination, after one month's further service, revealed that the main...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... bearings, they occupy the available space, locating themselves by contact with each other. Ball bearings can be divided into three categories: radial contact, angular contact, and thrust. Radial-contact ball bearings are designed for applications in which loading is primarily radial with only low axial...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001730
EISBN: 978-1-62708-229-7
..., driven through the shaft, is guided by two roller bearings. A thrust bearing supports the entire load applied by the spring pressure, grinding ring weight, and other associated components. Fig. 1 This is a sectional view of the central shaft of a coal pulverizer which failed twice at the indicated...