Oilless Sliding Bearing refers to a special bearing. The materials include metal materials, etc., which are characterized by simple structure and convenient manufacturing. The materials of bearing bushes and bearing linings are collectively referred to as sliding bearing materials. Sliding bearing applications are generally under low-speed and heavy-duty conditions, or operating parts that are difficult to maintain and fill with lubricating oil.
Oil-free sliding bearings can realize self-lubrication through design, and work smoothly, reliably and without noise. Under liquid lubrication conditions, the sliding surface is separated by lubricating oil without direct contact, and friction loss and surface wear can be greatly reduced. The oil film also has a certain vibration absorption capacity. But the starting frictional resistance is relatively large. The part of the shaft supported by the bearing is called the shaft diameter, and the part matching the shaft diameter is called the bearing bush. In order to improve the friction properties of the bearing pad surface, the anti-friction material layer cast on the inner surface is called the bearing liner.
The materials of oil-free sliding bearings are:
1) Metal materials, such as high-strength brass, tin bronze inlaid graphite bearings, etc.
2) Porous metal materials (powder metallurgy materials);
3) Non-metallic materials (nylon, polytetrafluoroethylene).
Among them, bearing alloys: bearing alloys, also known as white alloys, are mainly alloys of tin, lead, antimony or other metals. Because of their good wear resistance, high plasticity, good running-in performance, good thermal conductivity and good anti-glue and compatibility with The oil has good absorption, so it is suitable for heavy loads and high speed. The strength of the bearing alloy is relatively small and the price is relatively expensive. When in use, it must be cast on bronze, steel belts or cast iron-bearing bushes to form a thinner coating.
Porous metal material: Porous metal is a kind of powder material. It has a porous structure. If it is immersed in lubricating oil, the micropores are filled with lubricating oil and become an oil-containing bearing with self-lubricating properties. Porous metal materials have low toughness and are only suitable for steady non-impact loads and medium and low speeds.
Bearing plastics: Commonly used bearing plastics include phenolic plastics, nylon, polytetrafluoroethylene, etc. Plastic bearings have greater compressive strength and wear resistance, and can be lubricated with oil and water. They also have self-lubricating properties, but they have poor thermal conductivity.
Jiashan Minqin Oilless Bearing Co., Ltd. is an Oilless Bearing Manufacturers with a variety of Oilless Sliding Bearing products. Welcome to visit our official website.