The Study of Contact Problems for Small Rolling Bearings Manufactured of Plastic Material

摘要

Engineers think twice before using plastic bearings in their designs, because they have trusted steel bearings for years or because they think plastic can't handle demanding applications or environments. Plastic bearings can endure extreme temperatures, heavy loads and high speeds and offer more freedom when it comes to maintenance. Their resistance to dirt, dust and chemicals make plastic bearings a viable steel replacement. Plastic bearings can reduce costs up to 25%, they are highly wear resistant, with a low coefficient of friction and they can replace pricier alternatives in many applications. Plastic bearings also do not typically need lubrication unless steel balls are used in combination with plastic races and are designed to maintain a low coefficient of friction during the life of the bearing. Compared to steel bearings, which can become pitted and have a higher coefficient of friction, plastic bearings last longer. Also, plastic bearings can be used in wash-down applications, salt water and harsh chemicals without decreasing performance. Water can be considered a lubricant for plastic bearings [1].