According to the different requirements of bearing and the bearing seat, and the classification of the bearing is not identical also, when used according to the design, should be carefully checked.

1 according to the classification and the shape of the bearing:

1.1 spherical outdide bearings, also known as the bearing unit (SKF). Don't call outside the spherical bearing seat belt bearing. 1.1.1.1 outer spherical bearing its according to bearing series is divided into 200 series. The 500 series. The 300 series. The 600 series. XOO series.

1.2 outside the spherical bearing according to the shape is divided into vertical (P), square (F), diamond (FL), round (C), convex stations (FC), round square convex (FS), dark hole (PA), hanging type (FA).

1.3 integral (i.e., not separate) vertical bearing seat, bearing box cover with screw fastening. The vertical bearing seat was initially developed as a light rail truck axle box, but also can be used in the traditional vertical bearing group. Not separate vertical bearing housings group than separated high rigidity, some can carry heavier load. Spherical bearing is also belong to the monolithic block.

2 split housings

2.1 split bearing, according to the requirement of the matching of different bearings and shaft SN2, 5, 3, 6 series, SNL2, SNL5, SD is 2, 5, 3, 6, 3100, 3000, 3200 [1]

Bearing can be divided into: split rolling bearing, sliding bearing, bearing, flanged bearing, outside spherical bearing, etc.