Lubricant Effect
Lubricant Effect - Related Videos
09:21
Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer
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Cited by 3 •
2015
We present a protocol for using a piezoelectrically-assisted tribometer and optical profilometer to investigate the dependence of ultrasonic wear and friction reduction on linear velocity, contact pressure, and surface properties.
01:23
Design Example: Deciding Thickness of Lubricating Fluid in a Shaft
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2025
Effective lubrication between a rotating shaft and its bearing housing is essential in rotating machinery to minimize friction, wear, and energy loss. With carefully controlled thickness and viscosity, the lubricant layer prevents metal-to-metal contact, ensuring smooth operation. To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular velocity...
10:42
Flow Cytometric Analysis of Particle-bound Bet v 1 Allergen in PM10
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Cited by 8 •
2016
Here, we present a protocol to quantify allergen-loaded particles by flow cytometry. Ambient particulate matter particles may act as carriers of adsorbed allergens. We show here that flow cytometry, a method widely used to characterize suspended solids >0.5 µm in diameter, can be used to measure these allergen-loaded particles.
10:24
Quantitation of Endothelial Cell Adhesiveness In Vitro
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Cited by 10 •
2015
We report an in vitro method that allows the quantitation of the actual number of adhesive cells within an endothelial cell monolayer.
12:02
Collection and Extraction of Occupational Air Samples for Analysis of Fungal DNA
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Cited by 2 •
2018
Determining the fungal diversity within an environment is a method utilized in occupational health studies to identify health hazards. This protocol describes DNA extraction from occupational air samples for amplification and sequencing of fungal ITS regions. This approach detects many fungal species that can be overlooked by traditional assessment methods.
FAQs
The operating regime determines how much protection the lubricant can provide. With sufficient film separation, contacting surfaces are kept apart; in mixed or boundary operation, some direct contact remains and molecular layers or additives become important. Engineers therefore evaluate load, speed, viscosity, temperature, and surface condition together, because changing one variable can shift the balance between separation and contact.
Load and speed influence whether a film can separate surfaces during operation. Temperature also matters because it changes the conditions in which the lubricant must function, while surface condition affects the quality of contact. Considering these factors together helps engineers avoid selecting a lubricant based on viscosity alone and supports more reliable control of friction, wear, and heat generation.
Additives become especially important when the lubricant film does not completely separate contacting surfaces. They help molecular layers limit direct contact, supplementing the protection provided by the bulk lubricant. This mechanism is relevant in conditions where full-film separation is not maintained, allowing engineers to address friction and wear through both film behavior and additive-supported surface protection.
Selection begins by matching the lubricant to the system's load, speed, temperature, viscosity requirements, and surface condition. Engineers then consider whether operation is expected to remain fully separated or enter mixed or boundary regimes. Choosing among oils, greases, and specialized fluids in this context helps control friction, heat generation, wear, and maintenance needs.
The effect is important wherever contacting surfaces must move under load, including bearings, gears, engines, and manufacturing systems. In these applications, lubrication supports motion while addressing friction, wear, and heat generation. Its role is therefore tied directly to equipment efficiency, operating temperature, component life, and the energy or maintenance losses associated with mechanical operation.
Engineers can assess whether the chosen lubricant improves motion, limits friction and wear, controls operating temperature, and supports longer component life. They can also consider reductions in energy losses and maintenance demands. These outcomes connect lubricant selection to practical system performance rather than treating lubrication as an isolated material choice.