Timothy Pond Friction, Wear, and Lubrication 10/25/12 The purpose of this project is to investigate the rolling friction of wheel bearings. It is important for wheels that support transport machinery such as cars, trucks, busses, and trains to reduce friction as much as possible. Very small difference in friction for different wheel bearings can make a different over time. This can create much cost when considering fuel mileage. The affect of different materials and lubrication methods will also be investigated. The lifespan of different wheel bearings will also be considered. The cost associated material replacement due to excessive wear and higher initial cost will be compared. In some instances it may be more economical procure a more expensive bearing system initially that will last longer than a cheaper bearing that will wear out and cost more over the same time period.