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A |
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Abrasive wear
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Additives
![]() Compounds that enhances some property of, or imparts some new property to, the base oil. The more important types of additives include anti-oxidants, anti-wear additives, corrosion inhibitors, viscosity index improvers, and foam suppressants. |
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Adhesive wear
![]() is often referred to as galling, scuffing, scoring, or seizure. Material transfer between two surfaces, or loss from either surface, due to localized bonding between the contacting asperities. |
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Aerostatic bearings, see "Gas bearings". | ||
AF-coating see "Solid lubricants". Bonded films to be applied like paints with high load-carrying capacity and low shear strength. |
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Aquaplaning
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B |
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BL, Boundary Lubrication, see "Stribeck curve". |
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Bleeding, see "Grease lubrication" | ||
C |
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Camshaft failure mechanism
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Compound is a blend of ingredients tailored for particular characteristics required to optimize performance in some specific service. A mixture of base materials, chemicals, reinforcements, solid lubricants etc. | ||
Consistency, see "Grease lubrication" | ||
D |
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Damage analysis, see "Failure mode classification" |
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E |
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Elasto Hydrodynamic Lubrication
![]() (EHD or EHL) Lubrication model modified to take into consideration the elastic properties of the bearing material and the viscosity increase of the lubricant under high pressure |
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Elastomer is synonymous with rubber like materials. Both plastics and elastomers are polymers. Elastomers are defined by their properties (ASTM), i.e. a) it must not break when stretched approximately 100% and b) after being stretched 100%, held for 5 minutes and then released, it must retract to within 10% of its original length within 5 minutes after release. | ||
Engine lubrication system, see "Lubrication" | ||
EP-bearings, see "Gas bearings" or "Hydrostatic bearings". | ||
Erosive wear, where hard particles carried in a gas or liquid stream strike a surface. | ||
F |
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Failure mode classification for machine elements (ISO)
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False Brinelling, fretting wear in concentrated contacts. In bearings this localized wear appears as a depression in the race, however caused by oscillation. | ||
Fasteners
![]() Calculation of tightening torque, metric thread |
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Flash temperature
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Flexure hinges
![]() Flexure hinges hold several advantages over classical rotational joints, including no friction losses, no need for lubrication, no hysteresis, no clearance, no wear. |
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Formula one racing
![]() How is it possible that one team experiences several engine blow-ups in one season while its competitor almost always manages to reach the finishing line? |
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Four Ball EP/AW Tester
![]() Test apparatus for lubricants: Extreme pressure additives, anti-wear |
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Fretting wear, is the wear that occurs by minute oscillation. | ||
Friction measurement
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G |
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Gas Bearings
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Gear Calculation
![]() Surface durability and tooth-root stress of spur gears acc. ISO 6336 |
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Graphite see "Solid lubricants". Graphite is best suited for lubrication in a regular atmosphere. Water vapor is... |
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Grease lubrication
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H |
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Hard disk
![]() The separation between the magnetic read/write element and the hard disk during operation, known as the flying height... |
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Head disk interface
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Hertz
![]() Calculation of elastic deformation in concentrated contacts. |
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HL, Hydrodynamic Lubrication, see "Stribeck curve". | ||
History of Science Friction
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How to
![]() Frequently asked questions. |
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Hybrid bearings
![]() Steel roller bearing with ceramic balls. |
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Hydrodynamic Lubrication
![]() History; Tower, Reynolds, Sommerfeld... |
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Hydrostatic bearings
![]() Externally Pressurized bearings, liquid lubricated |
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Hydrostatic Lock Gate Bearings
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I |
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ISO 286-2 tolerances for shafts
![]() ISO 286-2 tolerances for holes ![]() |
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J |
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Journals, see "Tribology Journals" | ||
K |
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L |
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Laboratories
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Leonardo Da Vinci (1452-1519), see "History of Science Friction" | ||
Limiting PV-Value
![]() Measuring the load capacity of plastic journal bearings. |
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Lubrication, engine lubrication
![]() The reason why, despite of frequent replenish of oil, oil change remain essential or even become more essential. |
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M |
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Material properties
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ML, Mixed Lubrication, see "Stribeck curve" | ||
Molybdenum Disulphide see "Solid lubricants". MoS2 lubrication performance often exceeds that of graphite and is effective in... |
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N |
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NLGI, see "Grease lubrication" | ||
O |
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P |
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Pin-on-ring tribometer
![]() see also "Test equipment" |
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Polymers
![]() Both plastics and rubbers are polymers. |
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Porous bearings, see "Sintered Bearings" |
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Precision and micro systems engineering, see "Gas bearings". | ||
PTFE see "Solid lubricants" and "Polymers". | ||
Pumpability is the ease with which a pressurized grease can flow through channels. | ||
Q |
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R |
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Rail contact
![]() Shakedown, Ratcheting, Rolling contact fatigue |
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Ratcheting behavior, see "Rail contact" | ||
Rubber includes natural rubber and synthetic rubber, i.e. rubber like materials or elastomeric materials, see "elastomers" | ||
Rubber Stave or Sleeve
bearings
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S |
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SAE = Society of Automotive Engineers, see "Viscosity" | ||
Shakedown, elastic shakedown, plastic shakedown, see "Rail contact". | ||
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Slumpability, or feedability, is the ability of grease to be drawn into (sucked into) a pump. | ||
Solid Lubricants
![]() Graphite and molybdenum disulfide (MoS2) are the predominant materials used as solid lubricant. Other components that are useful solid lubricants include... |
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Stave bearings, see "Rubber stave bearings" | ||
Stribeck curve
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T |
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Test equipment
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Tribology is defined as the science and technology of interacting surfaces in relative motion, and embraces the study of friction, wear and lubrication. | ||
U |
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V |
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Viscosity
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W |
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Wear rate
![]() Equation to compute the wear rate (Archard,1953). |
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Wear mechanisms
![]() Abrasive wear, Adhesive wear, Corrosive wear, Surface Fatigue, erosion... |
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Wire Drawing
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X |
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Y |
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Z |
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www.tribology-abc.com |