In this chapter, the fundamentals of cylindrical roller bearings are introduced. The first
aspect is the classification of cylindrical roller bearings in terms of deferent inner ring
and outer ring design, or the types of cage guidance.
Then the definition of the radial clearance of a cylindrical bearing is explained. Its
influence on load distribution in radial plane is also presented. Since it is very common
that the cylindrical rollers are crowned, the pressure distributions of different profiles
are compared.
Regarding the kinematics in cylindrical bearings, the theoretical rotational speed of
rollers and the cage are derived assuming no slip during the rotations. The distribution
of possible lubrication regimes within a cylindrical bearing are classified according to
the lubricant film parameters.
Since the traction behavior of the lubricant is quite important for the dynamic
performance of cylindrical bearings, the friction coefficient for different lubrication
regimes are derived through the curve-fit of obtained data from measurements.
Afterwards, a chart that demonstrates of the possible forces and moments acting on a
roller is given. Lastly, the main damage modes of cylindrical bearings are explained.
These fundamentals enable the engineers to have a good understanding about
cylindrical bearings and are useful for finding out the key parameters that are
representing a cylindrical bearing model in multi-body- simulations.