BEARING HOUSINGS - CBC Bearings
BEARING HOUSINGS - CBC Bearings
BEARING HOUSINGS - CBC Bearings
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9 <strong>BEARING</strong> SELECTION PROCEDURE<br />
<strong>BEARING</strong> SELECTION<br />
<strong>BEARING</strong> SELECTION<br />
Selection procedure: Rolling bearings include many types and sizes. Selecting the best bearing is important for<br />
getting the machine or equipment to function in the way it is supposed to. There are various selection procedures,<br />
but the most common are shown in the following figure:<br />
PROCEDURE CHECK ITEMS<br />
1<br />
2<br />
Confirm operating conditions<br />
and operating environment<br />
Select bearing type and<br />
configuration<br />
▲ Function and construction of components to house bearings ▲ Bearing mounting location<br />
▲ Bearing load (direction and magnitude) ▲ Rotational speed ▲ Vibration and shock load<br />
▲ Bearing temperature (ambient and friction-generated) ▲ Operating environment<br />
(potential for corrosion, degree of contamination, extent of lubrication)<br />
▲ Allowable space for bearing ▲ Bearing load (magnitude, direction, vibration, presence<br />
of shock load ▲ Rotational speed ▲ Bearing precision ▲ Rigidity ▲ Allowable<br />
misalignment of inner/outer rings ▲ Friction torque ▲ Bearing arrangement (floating side,<br />
fixed side) ▲ Installation and disassemble requirements ▲ Bearing availability and cost<br />
3<br />
Select bearing dimensions<br />
▲ Design life of components to house bearings<br />
▲ Dynamic/static equivalent load conditions and life of bearing<br />
▲ Safety factor ▲ Allowable speed ▲ Allowable axial load ▲ Allowable space<br />
4<br />
Select bearing precision<br />
▲ Shaft runout precision ▲ Rotational speed ▲ Torque fluctuation<br />
▲ Noise level<br />
5<br />
Select bearing’s internal<br />
clearance<br />
▲ Material and shape of shaft housing ▲ Fit ▲ Temperature differential between inner/<br />
outer rings ▲ Allowable misalignment of inner/outer rings ▲ Load (magnitude, nature)<br />
▲ Amount of preload ▲ Rotational speed<br />
6<br />
Select cage type and material<br />
▲ Rotational speed ▲ Noise level ▲ Vibration and shock load ▲ Load fluctuation<br />
▲ Moment load ▲ Misalignment of inner/outer rings ▲ Lubrication type and method<br />
7<br />
Select lubricant, lubrication<br />
method, sealing method<br />
▲ Operating temperature ▲ Rotational speed ▲ Lubrication type and method<br />
▲ Sealing method ▲ Maintenance and inspection<br />
8<br />
Select any special bearing<br />
specifications<br />
▲ Operating environment (high/low temperature, vacuum, pharmaceutical etc)<br />
▲ Requirement for high reliability<br />
9<br />
Confirm handling procedures<br />
▲ Installation related dimensions<br />
▲ Assembly and disassembly procedures.<br />
171
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