When two surfaces come into contact with each other, friction and wear can be reduced by using lubricants. Applied at the point where they meet. In this work, the use of solid and semi-solid lubricants in various sectors has been studied and reviewed. Solid lubricants have recently gained popularity as environmentally friendlier, less hazardous, and more readily biodegradable alternatives to petroleum-based oils.A thickening agent dispersed in a liquid lubricant produces a lubricating grease that is "solid to semi-fluid." For a better understanding of lubricants, properties, grades, and so on, the papers listed in the following parts have been reviewed in detail for your convenience. In addition, it clearly illustrates the distinctions between solid and semisolid lubricants. With the product's area of application, other types of solid and semi-solid lubricants were also on show.

Lubricants, Solid, Semi – Solid, Grease, Oils.