Typically, two bearing shaft is supported in the radial and axial directions, the bearing of the side referred to as the fixed end bearings, which bear both radial and axial loads, since the fixed shaft and bearing box relative The role of the axial displacement. Called the other side of the free end, only bear radial load, axial relative movement.
Fixed end bearing must be fixed to the shaft and bearing box suitable bearing can withstand the composite load radial bearings, such as deep groove ball bearings, spherical roller bearings and double row angular contact ball bearings or tapered roller bearings. Withstand pure radial load radial bearing combinations, such as inside and outside the ring without the wall of the cylindrical roller bearing deep groove ball bearings or four point contact ball bearings or bi-directional thrust bearing combination, can also be used as a fixed end bearings. At this time, the second bearing to provide bi-axial positioning, but the installation must maintain a radial interval bearing box. The free end bearing in the shaft due to thermal expansion, the length change, the bearing does not occur within the extrusion. Axial displacement can occur inside the bearing, the bearing ring and bearing may also occur.
 "Cross-fixed" refers to a bearing arrangement, wherein each bearing on the shaft for the uni-directional positioning, and opposite in direction. This combination is mainly used for the minor axis. Radial bearings are able to withstand at least a direction axial load applicable, including deep groove and angular contact ball bearings, tapered roller bearings NJ-type cylindrical roller bearings, angular contact ball bearings or tapered roller bearings, some cases, must be applied to pre-load.
Bearing Speed: The operation speed of rolling bearings subject to allow working temperature restrictions. The low friction bearings, its internal heat generated in the corresponding lower, making it ideal for high-speed conditions. Deep groove ball bearings and self-aligning ball bearings under pure radial load, or angular contact ball bearings in the joint load, compared to other bearings can withstand high speed. With ceramic rolling elements precision angular contact ball bearings or deep groove ball bearing, even up to a higher speed. For design reasons, the thrust bearings of the operating speed can not be as high as the radial bearing.
The bearing accuracy: high rotation precision bearing arrangement (such as machine tool spindle) and used in high-speed conditions, should be used in accuracy is higher than ordinary bearing. Can provide a variety of high-precision bearings, single row angular contact ball bearings, single and double row cylindrical roller bearings, as well as one-way and two-way angular contact thrust ball bearings.



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