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grease lubrication

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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
...-type mineral-oil lubricant (containing molybdenum disulfide and polytetrafluoroethylene particles) or grease conforming to MIL-G-81322 (containing thickening agent and synthetic hydrocarbons) and had two-piece spot-welded retainers. On visual examination, the balls were observed to be embedded...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047935
EISBN: 978-1-62708-225-9
... was suspected to have caused the electric discharge by accumulation and discharge of static charge. The electrical resistance between the rotor and the motor frame lubricated with electrically conductive grease and the grease used in the current case was measured and compared to confirm the fact the currently...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001382
EISBN: 978-1-62708-215-0
..., and hardness. No defects were present to contribute to failure. Improper lubrication procedures caused the bolt to be frozen in an orientation such that the grease port was subjected to repeated tensile loading. This led to fatigue cracking and final complete fracture. The failure did not appear...
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
... between rollers and rings for providing lubrication are also key factors in ensuring the safe operation of bearings [ 5 , 6 ]. Prashad [ 7 ] testified that the failure of some cylindrical roller bearings in alternators was just relevant to the chemical decomposition of the grease. Thus, thorough...
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
... a defective seal in a grease-lubricated bearing application. (b) 1.5×. (c) 75×. Source: Ref 4 Some lubricants decompose after extended service without replacement or replenishment, forming acidic by-products. In the presence of moisture, bearing surfaces may be badly attacked by what is referred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001619
EISBN: 978-1-62708-225-9
...-type material, such as molybdenum disulfide, to a liquid or grease lubricant may produce an improvement. 9 An alternative policy is to clamp the surfaces sufficiently tight so that no relative movement occurs. Also, surface hardening by nitriding has been shown to be beneficial in improving...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001620
EISBN: 978-1-62708-229-7
... a coefficient of friction as possible. This can be accomplished by ensuring good lubrication between the faying surfaces. When a plain lubricant is ineffective in reducing fretting, the addition of low-friction-type material, such as molybdenum disulfide, to a liquid or grease lubricant may produce...
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
... of friction as possible. This can be accomplished by ensuring good lubrication between the faying surfaces. When a plain lubricant is ineffective in reducing fretting, the addition of low-friction-type material, such as molybdenum disulfide, to a liquid or grease lubricant may produce an improvement. 5...
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
... of the track. One of the most prevalent causes of skidding is hardening of the grease lubricant due to deterioration or contamination by dirt or other foreign matter. The rotation of the balls or rollers within the cage may be effectively prevented and, in some instances, the bearing can lock to such an extent...
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
... area and from the spacer sleeve, roller bearing, and lockwasher were identified by x-ray diffraction as ferric oxide (α-Fe 2 O 3 ) with minor constituents of metallic iron and copper. Discoloration of the deposit was caused by the grease lubricant and mishandling during disassembly. Spectrochemical...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
... reddish-brown debris of ferric oxide, which, when mixed with oil or grease, produces debris that is often referred to as “blood,” “cocoa,” or “red mud.” Hence, in components that are lubricated so that ordinary corrosion is not likely to occur, the presence of reddish-brown debris is indicative...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090448
EISBN: 978-1-62708-222-8
... during the injection molding process. The grease present within the housing assembly was analyzed using micro-FTIR. The FTIR test results indicated that the grease was composed of a relatively complex mixture. The lubricant contained a hydrocarbon-based oil, a phthalate-based oil, lithium stearate...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006759
EISBN: 978-1-62708-295-2
... assessments. The optimal time to obtain chemical information on corrosion products, surface contamination, greases, lubricants, and fluid media is as soon as the failure is discovered. Having a well-trained analyst, technician, or engineer is critical in maintaining the integrity of the sample...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047968
EISBN: 978-1-62708-225-9
... was installed in contact with the inner ring for accurate positioning of the microdrum. The particles contained in residue achieved after cleaning of the grease on bearings with a petroleum solvent were attracted by a magnet and detected under a SEM (SEM) to be flaked off particles from the outer raceway...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001472
EISBN: 978-1-62708-221-1
.... 3 Fatigue failure of shaft originating drilled radial hole. The sheaves were lubricated by grease introduced from the end face of the shaft, it passed along an axial hole and then through a short radial hole to the region of the shaft carrying the sheaves as can be seen in Figure 3 where...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001783
EISBN: 978-1-62708-241-9
... in hardness and compressive yield strength. It is also possible to consider using the same material for the indenter and bushing as long proper lubrication is maintained. Current lubrication, Hi-Slip Grease could be replaced with extreme pressure oil-based lubricant which will help keeping contact between...
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
..., it is recommended that careful attention be given to lubrication and the condition of the grease and other lubricating fluids be monitored when feasible. Main Shaft Bearing Sleeve Main Shaft Bearing Sleeve Main Shaft Bearing Sleeve Table 1 shows the chemical composition of the failed main...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... mechanics fracture modes fracture surface lubricants macroscopic examination mechanical testing microscopic examination nondestructive inspection sampling simulated-service testing stress analysis wear failure ANALYZING the inevitable failures that occur during testing, manufacturing...
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
... and centered in the eye-bolt bore surface ( Fig. 4 ). The surface was only slightly damaged and did not show signs of corrosion pitting. Service loads were transmitted from the eye-bolt to the strut through press fit beryllium copper bushings which had been lubricated with molybdenum disulphide grease...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001749
EISBN: 978-1-62708-215-0
... metal-to-metal brass joints, then the fittings should be replaced with new, tight-sealing brass fittings. Hydrocarbon lubricants, such as oils or greases, and oily rags should not be used to assist in the mating or cleaning of fittings. The regulator next to the gas bottle should be maintained using...