If paired installation

If paired installation, so that one pair of bearing outer ring relative to that wide side face of wide and narrow side facing the narrow end. This can avoid additional axial force, and the shaft or housing to limit axial clearance within the range in both directions.
Its inner and outer ring raceway relative displacement on the horizontal axis, so it can support radial load and axial load - combined load (single row angular contact ball surface profile measurement can withstand axial load in one direction, so often paired installation).
Cage made ​​of brass, synthetic resins, etc., depending on the bearing forms, and application conditions.
More angular contact ball bearings are manufactured abroad bearing manufacturers, domestic applied to imported equipment such as more angular contact ball bearings 3204RS, etc.
Think back to back, back to front contact contact more simple, narrow side out, including wide-brimmed, another broadside included, narrow home, is back to back contact.

Crossed roller bearings are roller between the inner and outer wheel....

Crossed roller surface profile measurement are roller between the inner and outer wheel intervals intersecting at right angles to each other arranged. They can withstand the load from all directions (such as an axial thrust or momentum load, etc.). Due to the roller surface into line contact with the rail, therefore, the possibility of bearing a load and elastic deformation is small. This type of bearings are widely used in industrial automation, such as robots, machine tools and medical facilities, etc., need high rigidity, compact and high-speed still ensuring accurate of occasions.
In cross roller bearings, cylindrical roller in was due to a 90 ° V-shaped groove raceway is vertically aligned with each other through a spacer retainer, so a cross roller bearings can bear radial load, axial load and load torque loads in all directions and so on. Minimum size of the inner and outer rings are miniaturized, in particular close to the limit of a very thin type of compact size, and has high rigidity, it is most suitable for the joint portion or a rotating portion of the industrial robot, the rotary table of the machining center, use the rotating portion of the manipulator, precision rotary tables, medical equipment, meters, IC manufacturing equipment, etc..