Proper mounting of an oversized ball bearing unit is very important for the unit's overall performance. Failure to follow proper mounting procedures could lead to bad operation and shortened bearing life. Good quality design and manufacturing practice don't recommend the use of more than three bearings supporting a single shaft. Using more than three bearing shafts would require a separate shaft assembly and would also necessitate the use of a separate ball-bearings assembly.
Many different types of ball bearing assemblies can be used for mounting purposes. In addition, there are other mounting options as well. As an example, bearing shafts can be mounted with threaded ends. These threaded ends usually have an insert that allows for the installation of a screw guide, such that all parts are securely in place.
As with all bearings, there is no substitute for mounting the bearing assembly correctly. A bad or poorly manufactured bearing assembly could lead to premature bearing failure and a reduction in bearing life due to stress corrosion cracking.
Bearings with a center hole require special care. The center hole must be drilled through both the top and bottom plate so that the bearing assembly is installed properly. Careful drilling and tapping should be doing to ensure the center hole is in the exact spot as indicated on the ball bearing manual. The drill bit should be of the appropriate size for the bearing being mounted.
The bearing assembly should then be tightened in its proper setting, using the appropriate torque driver. Bearings with a single shaft should be tightened in its reverse direction for the adjustment to be effective. The correct tightening process is accomplished by turning the shaft until it is at a 90-degree angle with the opposite end of the bearing assembly. Turn the shaft in the opposite direction and tighten it in the original position before turning the screw clockwise and tightening it again. It is important to ensure that the shaft is fully turned to avoid any rubbing against the threaded ends of the bearing assembly and the bearings housing.
When tightening bearings, it is essential that they are tightened as tight as possible without causing the bearing assembly to loosen. If the bearing assembly begins to lose rigidity, it may need to be lubricated to keep it from collapsing. Failure to make adjustments and lubrication could cause bearings to wear out prematurely.
Bearings should also be checked periodically for signs of cracks and other damage. If cracks appear, they must be repaired to prevent additional wear and tear and possible failure in the future.
While bearing assemblies are not cheap, they will last a long time and are extremely durable. They are easy to install, inexpensive to buy and provide a sturdy and reliable support structure.