In the work of bearing rolling friction

In the work of bearing rolling friction. Rolling is a high degree of standardization of parts interchangeability, less lubricant consumption, mostly use grease lubrication, easy maintenance, reliable, static friction torque dynamic friction torque approaching, good starting performance at moderate speeds higher carrying capacity . However, high speed, low life sound bigger. Can be divided according to the direction of rolling bearing radial bearings and thrust bearings (see figure). Radial bearings mainly bear radial force, but also can withstand small axial force; thrust bearings can withstand axial force. Radial thrust bearings can support radial and axial forces. Rolling can be divided according to the shape of the rolling element
Rolling
Ball bearings, roller bearings and needle roller bearings. High speed, load is small, requiring high precision rotation should use ball bearings; load is large Roller bearing should be selected; loading large radial dimensions should be selected when they restricted needle bearing. Radial bearing rings of the inner and outer ring, inner ring and the shaft sleeve and often with the shaft rotates, the outer ring mounted in the bearing bore. Rolling rolling along the raceway rings, separated by the cage, to avoid friction between. Thrust bearings are divided into a tight circle and live ring in two parts. Tight circle and sleeve tight, live ring bearing in the bearing housing. Rings and rolling body with high strength, good wear resistance bearing steel, surface hardness after quenching should reach HRC60 ~ 65. Cage mostly made of mild steel stamping, and some copper alloy, bakelite cloth or plastic. Basic types listed in the table produced in China basic types of rolling bearings. Various types of rolling bearings is divided into B, C, D, E, G5 a precision. B is the highest accuracy level. G is the general accuracy level, the most common. High speed, there are strict requirements for precision rotation of the spindle, high precision bearings should be used, such as precision lathes, milling machines, boring, grinding grinding, aircraft engine, turbocharger, precision instruments selected C, D grade; coordinate boring machine, High-speed grinding elect B, C grade. Rolling easy maintenance, reliable, good starting performance at moderate speeds higher carrying capacity. Compared with the sliding bearing, radial bearing a larger size, poor damping capacity, high speed, low life sound bigger. Rolling in the radial bearings (mainly radial force) usually consists of inner and outer rings, rolling and rolling element cage four parts. Inner sleeve in the journal together with the shaft rotates, the outer ring mounted in the bearing bore. In the inner and the outer periphery of the inner periphery of the outer ring are formed with raceway. When the relative rotation of the inner and outer rings, the inner and outer rings of the rolling element raceway, are separated by the cage, to avoid friction. Thrust bearings are divided into a tight circle and live ring in two parts. Tight circle and sleeve tight, live ring bearing in the bearing housing. Rings and rolling elements commonly used high strength, wear resistance, good bearing steel, surface hardness after quenching should reach HRC60 ~ 65. Cage mostly made of mild steel stamping, copper alloys can also be used bakelite cloth or plastic manufacturing