Needle roller bearing, full cylindrical roller bearing, accuracy and service life

(needle roller bearing, fully loaded cylindrical roller bearing and service life): needle roller bearing is divided into two types, one is stamping bearing seat, the other is solid ferrule bearing. Stamping bearing blocks are mostly stretched with steel plates, and solid bearings are made of bearing steel.

Stamping outer ring needle roller bearings and cylindrical roller bearings need good raw materials. High carbon chromium steel is generally used for ferrules and rolling elements. Most bearings use SUJ2 of JIS steel. Suj3 is used for large bearings. When further impact resistance is required, chromium steel, chromium molybdenum steel and nickel chromium molybdenum steel are used as bearing materials. Carburizing quenching is adopted to make the steel have a hardened layer from the surface to the appropriate depth. Carburized bearings with proper hardening depth, fine structure, surface and core hardness have better impact resistance than bearings made of bearing steel.

Generally imported bearings are subject to vacuum degassing treatment, so the materials used have high cleanliness, low oxygen content and good quality.

At the same time, the rolling fatigue life of the bearing is significantly improved by appropriate heat treatment. In addition, there are stainless steel bearings that can be used in atmospheric pollution environment. Ceramic materials for special occasions. There is also high-speed steel with excellent heat resistance.

Cage has cold rolled steel, brass plate, stainless steel plate, carbon steel, and synthetic resin. For the selection of cage material, it is important to consider the working conditions: polyamide cage shall not be used when the temperature is higher than 120 degrees and lower than - 38 degrees; This cage should not be used in vacuum because it will become brittle due to dehydration!

Brass cages shall not be used in environments where the temperature exceeds 300 degrees; This kind of cage is also not suitable for ammonia. Ammonia will cause seasonal cracking of brass. If customers encounter problems such as internal bearing fracture of plastic packaging machine, we Hester bearings can provide you with professional services to solve the problem of internal bearing fracture of plastic packaging machine and install and configure suitable bearing products. The point is good sealing and strong overall bearing capacity. The major feature of needle roller bearing is high concentricity, but the bearing capacity is lower than that of roller bearing.

Needle roller bearing is an important part of machinery. The quality of bearing directly affects the service life of the machine. Therefore, it is more cautious to choose needle roller bearing and roller bearing than other accessories.