(Needle roller bearings, full complement cylindrical roller bearings and life): Needle roller bearings are divided into two types, one is stamped bearing seat, the other is solid ring bearing. Most stamped bearing seats are made of steel plate stretching, and solid bearings are made of bearing steel.
Stamped outer ring needle roller bearings and cylindrical roller bearings require good raw materials, and rings and rolling elements generally use high carbon chromium steel. Most bearings use JIS steel SUJ2. Large bearings use SUJ3. In the case of further need for impact resistance, chromium steel, chromium-molybdenum steel, nickel-chromium-molybdenum steel are used as bearing materials, and carburizing quenching is used to make the steel have a hardened layer from the surface to the appropriate depth. Carburized bearings with appropriate hardening depth, fine structure, suitable hardness of the surface and core hardness have better impact resistance than bearings using bearing steel.
Generally, imported bearings are vacuum degassed, so the materials used are clean, low in oxygen content, and of good quality.
At the same time, with proper heat treatment, the rolling fatigue life of the bearing is significantly improved. In addition, there is stainless steel that can be used for bearings working in atmospheric pollution environments. Ceramic materials for special occasions. There is also high-speed steel with excellent heat resistance.
Cages include cold-rolled steel, brass plates, stainless steel plates, carbon steel, and synthetic resins. When choosing cage materials, it is important to consider the working conditions: Polyamide cages should not be used in places where the temperature is higher than 120 degrees and lower than -38 degrees; this cage should not be used in a vacuum because it will become brittle due to dehydration!
Brass cages should not be used in environments where the temperature exceeds 300 degrees; this cage is also not suitable for ammonia, where ammonia can cause seasonal cracks in brass. If customers encounter problems such as internal bearing fractures in plastic packaging machines, our Hyster Bearings can provide you with professional services, solve the problem of internal bearing fractures in plastic packaging machines, and install and configure suitable bearing products. The point is good sealing and strong overall bearing capacity. The biggest feature of needle roller bearings is high concentricity, but the bearing capacity is lower than that of roller bearings.
Needle roller bearings are an important part of machinery, and the quality of bearings directly affects the service life of the machine. Therefore, choosing needle roller bearings and roller bearings should be more cautious than choosing other accessories.
