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  2. Lubricant - Wikipedia

    en.wikipedia.org/wiki/Lubricant

    Motor oil, a common lubricant. A lubricant (sometimes shortened to lube) is a substance that helps to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, transporting foreign particles, or heating or cooling the surfaces.

  3. Grease (lubricant) - Wikipedia

    en.wikipedia.org/wiki/Grease_(lubricant)

    Grease is a solid or semisolid lubricant formed as a dispersion of thickening agents in a liquid lubricant. ... thinning properties characteristic of the classical ...

  4. Motor oil - Wikipedia

    en.wikipedia.org/wiki/Motor_oil

    Synthetics include classes of lubricants like synthetic esters (Group V) as well as "others" like GTL (methane gas-to-liquid) (Group III +) and polyalpha-olefins (Group IV). Higher purity and therefore better property control theoretically means synthetic oil has better mechanical properties at extremes of high and low temperatures.

  5. Cutting fluid - Wikipedia

    en.wikipedia.org/wiki/Cutting_fluid

    Carbon dioxide (chemical formula CO 2) is also used as a coolant. In this application pressurized liquid CO 2 is allowed to expand and this is accompanied by a drop in temperature, enough to cause a change of phase into a solid. These solid crystals are redirected into the cut zone by either external nozzles or through-the-spindle delivery, to ...

  6. Synthetic oil - Wikipedia

    en.wikipedia.org/wiki/Synthetic_oil

    Synthetic oil is a lubricant consisting of chemical compounds that are artificially modified or synthesised. Synthetic lubricants can be manufactured using chemically modified petroleum components rather than whole crude oil, but can also be synthesized from other raw materials. The base material, however, is still overwhelmingly crude oil that ...

  7. Molybdenum disulfide - Wikipedia

    en.wikipedia.org/wiki/Molybdenum_disulfide

    A tube of commercial graphite powder lubricant with molybdenum disulfide additive (called "molybdenum") [33] Due to weak van der Waals interactions between the sheets of sulfide atoms, MoS 2 has a low coefficient of friction. MoS 2 in particle sizes in the range of 1–100 μm is a common dry lubricant. [34]

  8. Perfluoropolyether - Wikipedia

    en.wikipedia.org/wiki/Perfluoropolyether

    Some types are synthetic liquid lubricants that have been used in the aerospace industry for over 30 years. [1] The main properties of PFPE are being temperature resistant between −58 °C (215 K) and 257 °C (530 K) (depending on specific composites), having very low outgassing compared to other fluids ( vapour pressure of 6 × 10 −8 Torr ...

  9. Lubricity - Wikipedia

    en.wikipedia.org/wiki/Lubricity

    The lubricity of a substance is not a material property, and cannot be measured directly. Tests are performed to quantify a lubricant's performance for a specific system. This is often done by determining how much wear is caused to a surface by a given wear-inducing object in a given amount of time. Other factors such as surface size ...