First and foremost, lubricants protect against wear. Wear is caused by the permanent movement of two parts against each other and the friction involved. As a result, the surfaces wear off, which leads to a material loss. In addition, chemical and thermal stresses can also cause wear. Therefore, lubricants are indispensable helpers in many industries and are used for a large number of components and machines. Lubricants can be divided into the different types of lubricating oils, greases, lubricating pastes and dry lubricants.