High temperature grease is an extreme temperature grease for roller and plain bearings operating in high temperature applications up to 600°C, ideal for kiln car wheels, kiln doors and high temperature drying tunnels. It is also a dispersion of fine micronized graphite particles in a PAG synthetic base fluid that evaporates cleanly at higher temperatures, leaving behind a thin dry film lubricant. Conventional greases leave behind carbon residues at very high temperatures, which severely limits their performance; Akoberta high temperature grease is designed to evaporate the base oil cleanly and leave no carbon residue. The properties of high temperature grease Akoberta can be listed as follows. Excellent thermal stability extends component life by extending lubrication intervals Corrosion resistant, protects against condensation caused by changing temperatures No carbon residue – less cleaning required, shorter downtime Clean evaporation eliminates bearing seizures caused by carbon deposits, reducing maintenance costs.

Although two metal surfaces touching each other on a machine may appear extremely smooth, enlarging the surfaces reveals a landscape more reminiscent of a mountain range with bumps and valleys. Unless there is a suitable liquid film at operating temperature, it is these asperities that will come into contact with metal parts as they slide. The fluid film must be thick enough at operating temperature to separate the two surfaces, even under load. However, it should not be so thick that the parts have difficulty moving due to the viscous lubricant. For example, if you have two metal plates moving against each other in a hot environment, a low viscosity oil may not provide the ideal liquid film, resulting in metal-to-metal contact. This increases wear and heating while reducing component life. Now, if you take the same two components and use a lubricant that is very high in viscosity, there can be a drag effect that increases friction at operating temperature. This is an inefficient use of lubricant, resulting in unplanned time delays, extra energy use and costs.

Viscosity is a lubricant’s most important performance property. If the lubricant is too thick, it will flow slower (like molasses), creating more friction and therefore negatively affecting the efficiency of the equipment. If it is too thin (like water) and moves too freely or quickly, it will wear out machines more quickly because it cannot form an adequate film to separate moving parts. A lubricant’s viscosity will vary with differences in temperature. As lubricants heat up, their viscosity decreases, and as they cool, their viscosity increases. A viscosity index (VI) is assigned to a particular lubricant so that users can clearly understand its viscosity status at changing temperatures. The lower the viscosity index, the more viscosity is affected by changes in temperature.

The answer to this question is definitely yes. Grease is a combination of a base oil and a thickener. As the bearing warms up, oil becomes available to lubricate the bearing. If a bearing becomes excessively hot, the oil’s viscosity decreases and it separates from the thickener. At these extreme temperatures, oil can flow out of the bearing, leaving behind only the thickener. As a result, it may cause insufficient lubrication of the bearing. High temperature grease Akoberta does a better job of preventing oil separation at higher temperatures. This type of grease is a better choice for hot operating bearings. Examples might be bearings in conveyor ovens or heat treatment operations. If regular grease is used in these applications, the oil will separate, the bearing will lose its lubricant and the bearing will be damaged.