Amid task of various machines extensive assortment of disappointment process can happen. Prevailing reason of the breakdowns is origined from the develop-ments of machine components that are exposed to erosion. Rubbing by and large outcomes distinctive wear component and diverse type of wear. With respect to sliding sets we can meet all the more regularly designing polymers as substitution of customary steels having beneficial tribological properties when all is said in done. Alongside the new modern applications there has been improvement of new materials, coatings, composites, which require tribological properties to be found. Surface covering innovation was essential to accomplish expanded viva-cious execution, permitting lower grinding coefficients, higher security against surface disappointments and higher load limit. In applications with regular begin stop tasks such security against disappointments, predominantly scuffing, is im-perative. Other plan to be achieved with the surface coatings was the decrease of the measure of oil utilized in the gearboxes, keeping up or expanding the scuffing security and furthermore diminishing the beating misfortunes, by lessening the oil level. Another vital target that may be practiced by surface coatings was the de-crease or even end of some lethal oil added substances and assent the utilization of biodegradable and low poisonous quality greases.