Classification Summary Rolling classification of rolling bearings: Rolling bearing load bearing structure type classification said contact angle is divided into different Radial Bearings are mainly used to bear radial load Rolling nominal contact angle nominal contact angle divided into radial contact bearings nominal contact angle heart marine crane bearing to heart contact bearings bearing nominal contact angle greater than radial crane bearings thrust bearings are mainly used to bear axial load Rolling nominal 2002: Machine. 1. By Rolling structural type classification (1) can bear the load bearing their direction or nominal contact angle, divided into: a) radial bearings ----- mainly used to bear radial load bearing, nominal contact angle from 0 to 45. Press nominal contact angle is different, is divided into: radial contact bearings ----- nominal contact reali slim bearings angle is zero radial bearings: Radial angular contact bearings ----- nominal contact angle greater than radial bearings 0-45 of . 2) thrust bearing ----- mainly used for axial load bearing, the nominal contact angle greater than 45-90. Press nominal contact angle is divided into different: Axial contact bearings ----- nominal contact angle of 90 thrust bearings: Axial angular contact bearings ----- nominal contact angle greater than 45 but less than 90 of the thrust bearing. (2) the type of rolling element bearing according divided into: 1) rolling the ball as the ball bearing -----: 2) rolling the roller bearings for the rollers -----. Roller Bearing press roller type, is divided into: cylindrical roller bearings ----- rolling body is cylindrical roller bearings, cylindrical roller ratio of length to diameter of less than or equal to 3; needle roller bearings --- - rolling body is needle bearings, needle length to diameter ratio greater than 3, but a diameter less than or equal to 5mm; tapered Double Row Ball slewing bearing roller bearings ----- rolling body is tapered roller bearings; spherical roller bearings eleven rolling body is spherical roller bearings. (3) whether the bearing aligning their work is divided into: 1) aligning bearings ----- raceway is spherical shape, able to adapt to angular deviation and angular movement between the two raceways of the bearing axis ; 2) non-aligning bearing (rigid bearing) ----- able impedance path between roller bearing axis angular offset. (4) according to the number of rows of rolling elements bearings, divided into: 1) single row bearings ----- has a list of rolling element bearings; 2) ----- double row bearings have two rows of rolling element bearings; 3) ----- multi-row bearings with more than two rolling element bearings, such as three, four bearings.