(Needle Roller Bearings, Full Complement Cylindrical Roller Bearings and Life): Needle roller bearings are divided into two types, one is a stamped bearing seat, and the other is a solid ring bearing. Most of the stamped bearing seats are drawn with steel plates, and the solid bearings are made of bearing steel. Drawn cup needle roller bearings and cylindrical roller bearings require good raw materials, and high carbon chromium steel is generally used for rings and rolling elements. Most of the bearings use JIS steel grade SUJ2. Large bearings use SUJ3. When further impact resistance is required, chrome steel, chrome molybdenum steel, and nickel chrome molybdenum steel are used as bearing materials, and carburizing and quenching are used to make the steel have a hardened layer from the surface to an appropriate depth. Carburized bearings with appropriate hardening depth, fine structure, surface and core hardness with appropriate hardness have better impact resistance than bearings using bearing steel. Generally, imported bearings are subjected to vacuum degassing treatment, so the materials used have high cleanliness, low oxygen content and good quality. At the same time, with proper heat treatment, the rolling fatigue life of the bearing is significantly improved. In addition there are stainless steels that can be used for service bearings in heavily polluted environments. Ceramic material for special occasions. There are also high-speed steel with excellent heat resistance. Cages are available in cold-rolled steel, brass plate, stainless steel plate, carbon steel, and synthetic resin. The choice of cage material is important to consider the working conditions: Polyamide cages should not be used in occasions where the temperature is higher than 120 degrees and lower than -38 degrees; this cage should not be used in vacuum, because it will change due to dehydration. crisp! Brass cages should not be used in environments where the temperature exceeds 300 degrees; this kind of cage is also not suitable for ammonia, because ammonia will cause the brass to crack seasonally. We can provide you with professional services to solve the problem of bearing breakage in the plastic packaging machine, and install and configure suitable bearing products for you. The point is that the seal is good and the overall bearing capacity is strong. The major feature of needle roller bearings is high concentricity, but the bearing capacity is lower than that of roller bearings. Needle bearing is an important part of machinery, and the quality of the bearing directly affects the service life of the machine. Therefore, choosing needle roller bearings and roller bearings is more cautious than choosing other accessories.