1-20 of 73 Search Results for

insufficient lubrication

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047998
EISBN: 978-1-62708-225-9
... broken, and the seals were worn and bent out of shape. Examination indicated that the following factors contributed to the failures: Insufficient lubrication Contamination of the bearings by gritty particles (dirt) Intrusion of a corrosive agent (water) Corrosion pitting of rings...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047846
EISBN: 978-1-62708-218-1
... loading. It was revealed by visual examination that the fracture had initiated in the sharp corner at the bottom of a longitudinal hole which was part of a force feed lubricating system. Beach marks were observed on the fracture surfaces. It was revealed by further examination that the slip clutch...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001692
EISBN: 978-1-62708-229-7
.... Crack growth resumed when loading increased with cracking or fracture of adjacent bolts. The problem was identified as one of insufficient preload on the bolts. In the second failure on a different unit, a retaining nut on a blade assembly split, allowing a roller bearing to slide off a shaft...
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
... Abstract Factors which may lead to premature roller bearing failure in service include incorrect fitting, excessive pre-load during installation, insufficient or unsuitable lubrication, over-load, impact load vibration, excessive temperature, contamination by abrasive matter, ingress of harmful...
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
...-load ratings are based on results of laboratory rolling-contact fatigue tests that have been conducted under conditions as near ideal as possible. Any departure from these reasonably ideal conditions, such as misalignment, vibration, shock loading, insufficient or inefficient lubrication, extremes...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001846
EISBN: 978-1-62708-241-9
..., and journal surface. The excessive heat also softened the induction-hardened case on the journal surface, decreasing its fatigue strength. Fatigue crack initiation occurred at the root fillet of the groove because of stress concentration. rotary shaft bearing sleeve fracture insufficient lubrication...
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
... loss increase. See the article “Friction and Wear of Rolling-Element Bearings” in Friction, Lubrication, and Wear Technology , Volume 18 of ASM Handbook , 2017. Figure 3 illustrates those different internal structures. Fig. 3 Examples of different rolling-element bearing structures...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... and contacts operating in the mixed- and boundary-lubrication regimes, due to insufficient lubrication supply, inadequate viscosity, incorrect internal clearances, incorrect installation, or misalignment. Adhesive wear also can cause rapid and sometimes catastrophic failures ( Ref 2 ). This can occur in metal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001019
EISBN: 978-1-62708-217-4
... of a highly stressed chromium plate. A possible contributing factor was the presence of residual stress around the set screw. A complete engine investigation might also reveal some bearing misalignment or momentary loss of lubrication. There were insufficient data in this case to make a positive conclusion...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001098
EISBN: 978-1-62708-214-3
... sulfur and chlorine in the surface deposits. The observations indicated that the screws had failed by fatigue. Insufficient preloading was considered to be the most likely cause of the fatigue cracking. It was recommended that the proper preload on the screws be verified and maintained. Hydraulic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001621
EISBN: 978-1-62708-227-3
...-range cyclic stresses (for example, bending in a shaft) are enough to cause continued fatigue crack growth. In a small number of cases, however, the long-range stresses in the body of the component are insufficient to cause continued propagation. 4 In those cases, the result is shallow, nonpropagating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001408
EISBN: 978-1-62708-220-4
... in temperature. The material was a steel in the normalized condition with a 0.35% C content. It appears probable that deficient lubrication of the gland resulted in overheating of the rod due to friction. The presence of a sprayed-metal coating was probably an additional factor in promoting failure, as it would...
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
..., g/cm 3 7.45 6.74 7.45 Porosity, % 0 7.7 0 Grain size of β-phase, µm 100 10 to 20 150 50 Grain size of α-phase, µm 0.5 0.5 to 1.0 0.5 to 1.0 Wear intensity at dry sliding, mg/mm 3 11.5 × 10 −8 8.6 × 10 −8 9.7 × 10 −8 Wear intensity with lubricant, mg/mm 3 6.1...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... and maintenance responsibility Distress damage or failed components Application Undercapacity Overcapacity Incorrect physical condition assumed (temperature, pressure, etc.) Incorrect physical property assumed (molecular weight, etc.) Specifications Inadequate lubrication system Insufficient control...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... produce only partial thrust (insufficient to enable an aircraft to take off) is an example of a loss of function. The next level of failure involves a system or component that performs its function but is unreliable or unsafe ( Ref 1 ). In this form of failure, the system or component has sustained...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001504
EISBN: 978-1-62708-217-4
... the steel unprotected ( Fig. 3 ). These failures were promoted by a number of factors: a poor seal design between the axle and the lever assembly which did not prevent water ingress, insufficient lubrication points, and the inherently low resistance of the 300M steel employed to SCC in aqueous...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006830
EISBN: 978-1-62708-329-4
... machining, defective welds, residual welding stresses, misalignment, and improper and insufficient lubrication are all common and critical causes of lifting-equipment failures. Metallurgically, the most common cause of failures is improper heat treatment. Quench cracks and residual heat treatment or weld...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... imperfections in the slug materials Segregation in a steel slug that results in hard martensitic particles in the center of the slug, which act as barriers to material flow Insufficient die lubrication Fig. 14 Centerline chevron cracks in an extruded bar. Courtesy of Bharat Forge Limited, Pune...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... ) during solidification and contraction of the metal, when there may eventually be insufficient liquid metal to feed the last remaining portions as they contract. A concave cavity thus forms at the top of the ingot because of metal shrinkage during solidification. The cavity usually forms in the shape...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001199
EISBN: 978-1-62708-235-8
... considerably to the overall cost of production. Although “laking” is a common production problem, little information has been published on the nature of the defect and the conditions under which it occurs. It is considered generally that the defect arises from incorrect gating, insufficient control...