Needle roller bearing is a roller bearing, roller size though sometimes a bit beyond the scope of JIS definition of needle size, but it is usually referred to as needle roller bearings. 
 Needle roller bearings, according to the direction of load bearing, can be divided into radial bearings and thrust bearings. Among them, radial bearings, including: various series of drawn cup type, entity type, and special-purpose bolt circle type and file type needle roller bearings. 
 Thrust Roller Bearings 
 SK roller thrust cylindrical roller bearings, including the use of products and the use of spherical roller products. Although such bearings can only carry axial load, but has to bear heavy loads and shaft for the high rigidity of the features. Among them, spherical roller thrust bearings, roller central bulge, and with self-aligning feature, so that this bearing and shaft deflection without installation of the error. Standard configuration of the cage, machined brass as; E-type products using stamping process of the cage, with a large load capacity of the features.