1 How to limit the axial position, including radial and axial position are the first issues to consider. Generally more than double the shaft supporting structure, the axis of the radial position of supporting the common limit of two, each bearing at the proper role of the radial location from the heart or the angular contact bearings. Axial position of the limit by two bearing axial displacement in one direction is also supported by a limited axial displacement in both directions, in general, the axial positioning of the different ways available to different running accuracy. Therefore, the design of the shaft supporting structure shall be based on the accuracy of operation and working conditions, select the axial positioning of the specific programs.

2 in both radial load and axial load case, bearing angular contact bearings and are often used tapered roller bearings installed in pairs. Angular contact bearings installed in pairs arranged in three ways. Two bearing outer ring relative to installation of said wide end back to back installation. Two load-bearing role of the point falls outside the bearing span. This arrangement for supporting a large span, when the steel cantilever axis, good elongation axis when heated, the outer ring was torn off the trend, which axis is not stuck, it is more widely used. However, should the use of preload installed, when heated in the shaft will reduce the amount of preload. Two bearings installed relatively narrow end, said outer face to face mounting. The two bearing support force point falls within the span. This arrangement of simple structure, dismantle, easy to debug than it is also more widely used, mainly for short-axis and temperature is not high occasions, but must be left to pay attention to alternative clearance. Axial clearance should not be too large, the axis running through the General Assembly to reduce accuracy. When the axial load greater than the bearing must withstand the same time, often using the bearing outer ring width, relatively narrow surface installed in series. The bearings are force-point fall on the same side of the bearing arrangement, it said in the same direction, also known as series. When using this arrangement to pay attention to the structure and manufacturing to ensure that each bearing can withstand the load evenly as possible.