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lubricants

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Published: 01 January 2002
Fig. 3 The friction of sliding bearing pairs for three different lubricants. More
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Published: 01 January 2002
Fig. 31 Viscosities of several lubricants for ball and roller bearings, as related to operating speed and temperature. Source: Ref 14 More
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Published: 30 August 2021
Fig. 6 The friction of sliding bearing pairs for different lubricants. EP, extreme pressure More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0089633
EISBN: 978-1-62708-220-4
... 100x magnification) supported the conclusion that the crack initiated at the inner edge of a lubrication hole and had propagated toward both the threaded and flange ends of the casting. An appreciable residual-stress concentration must have been present and caused propagation of the crack. The residual...
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Published: 01 January 2002
Fig. 1 Typical RCM decision logic diagram. S, servicing; L, lubrication; OC, on-condition; HT, hard-time (comprises scheduled restoration and scheduled discard); FF, failure-finding; PM, preventive maintenance. Note: S, L, and HT are aviation-unique terms and are not standard RCM terms. More
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Published: 01 January 2002
Fig. 13 Results of lubricated compound impact wear experiments ( Ref 29 ). ( V is impact velocity and v = sliding velocity; ×: v = 0 m/s; •: v = 0.25 m/s; □: v = 1.27 m/s; ▲: v = 3.81 m/s) More
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Published: 01 January 2002
Fig. 2 Wear surface by cavitation of copper-base alloy in a lubricated gearbox. Courtesy of CETIM More
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Published: 01 January 2002
Fig. 15 Pitting and surface microcracks on the tooth flank of an oil-lubricated nylon driving gear. 37×. Source: Ref 53 More
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Published: 01 January 2002
Fig. 13 (a) Indicative trends in influence of reinforcement and solid lubrication on friction and wear of high-temperature polymers. P = 1 MPa; V = 1 m/s. PEN, polyethernitrile; PEEK, polyetheretherketone; PEEKK, polyetheretherketoneketone; gr, graphite; TF, Teflon. 1, neat polymers; 2 More
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Published: 01 January 2002
Fig. 1 Schematic of the transition from inadequate (boundary) lubrication at start-up to hydrodynamic lubrication at full speed. (a) Steady load at start-up. (b) Steady load at full speed More
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Published: 01 January 2002
Fig. 8 Examples of adhesive-type wear caused by inadequate lubrication. (a) Metal pickup on a roller outside diameter from sliding contact on the cage shown in (b). Approximately actual size. (c) The end of the same roller showing the scoring damage from the rolling-sliding contact More
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Published: 01 January 2002
Fig. 17 Microspalling (peeling) on a tapered-roller bearing caused by a thin lubricant film compared to the composite surface roughness. (a) Cup showing fatigue on the peaks of surface texture. (b) Cone showing fatigue on the peaks of surface texture. (c) Roller with a general spalled area More
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Published: 01 January 2002
Fig. 3 Examples of mild and severe wear morphology. (a) A lubricated sliding wear scar on steel in the mild wear regime. (b) The appearance of the same type of scar in the severe wear regime More
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Published: 01 June 2019
Fig. 1 Pitting and surface microcracks on the tooth flank of an oil-lubricated nylon driving gear. 37×. Source: Ref 1 More
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Published: 30 August 2021
Fig. 4 Schematic of the transition from (a) inadequate (boundary) lubrication at startup to (b) hydrodynamic lubrication at full speed, h is minimum separation More
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Published: 30 August 2021
Fig. 36 Heavy smearing and scratches on axial ribs due to poor lubrication under high axial loads in a roller bearing. (a) Heavy abrasive wear on cylindrical roller board, same working conditions. (b) Seizure of axial rib under the same working conditions. (c) Note that current practice More
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Published: 30 August 2021
Fig. 69 Elastohydrodynamic lubrication and the influence of film thickness on the damaging mechanism of the contact areas. Source: Ref 50 More
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Published: 15 January 2021
Fig. 9 Schematic of the influence of lubrication regime on rolling-sliding wear. Adapted from Ref 5 More
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Published: 15 January 2021
Fig. 15 Results of lubricated compound-impact wear experiments. V = impact velocity and v = sliding velocity; x: v = 0 m/s (0 ft/s); ●: = 0.25 m/s (0.8 ft/s); □ : v = 1.27 m/s (4.2 ft/s); ▴: v = 3.81 m/s (12.5 ft/s). Source: Ref 4 More