Piston pins are a very important component in any manufacturing process. It is widely used in engineering of machines and manufacturing units. The energy which is released from the combustion of fuel-air-mixtures is conveyed by pistons and linking rods to the crankshaft which is then converted into kinetic energy. The piston pin attaches the piston to the connecting rod. Piston pins are made of various materials; however the most common material used in the production of piston pin is steel. Steel is casted into steel wires and steel bars which is then used in manufacturing of piston pins. With the help of various machines they are turned, hardened and grinded. While manufacturing piston pin there are few things which needs to be kept in mind. One of them is that the final product must be with a tolerance below 0.003 millimetres and must also have a very high surface quality with a perfect shape. If it is not shaped accordingly then it can result in friction and this can create problems during the production process. Another major thing which needs a mention is that the piston pins which are used in high stress level and pass through high revolution and combustion must cover themselves with an extra ultra-hard DLC layer. This layer helps them maintaining their quality and protects them from wear and tear during the manufacturing process. Since a piston pin has to be of the correct size therefore even a little wear and tear can affect the manufacturing process to a very large extent. Hence it becomes all the more important to protect them from wear and tear. The piston pins are one of the most important components of a combustion engine and therefore have to undergo a lot of stress and pressure. In order to make proper use of a