The ideal complement to ball bearings.
Ball bearings run smoothly and noise-free when
pre-loaded with our Original
SCHNORR® "K" disc
springs. They are available in slotted and in
non-slotted versions for bearings up to a
diameter of 360 mm. Depending on the purpose for
which they are used one or more disc springs may
Since in particular cases the
inner ring rather than the outer ring of the
ball bearing should be preloaded all "K" disc
springs are designed such that the outer
diameter suitable for one size of bearing will
also fit the inner diameter of another size of
bearing. For example, a "K" disc spring which is
designed for preloading the outer ring of a size
6302 bearing can also be used to preload the
inner ring of a size 6205 or 6305.
The use of "K" disc springs has important
An important advantage of "K" disc springs is
their shape of a simple ring. This ensures that
the load which they apply to the bearing is
distributed evenly around the bearing ring.
Additional movement at constant load can be
provided by arranging the springs in alternate
direction (single series). Conversely,
additional load can be applied at constant
spring deflection when springs are arranged to
face the same direction (parallel stacking).
As all springs are designed to have a highly
regressive characteristic large (ho/t) spring
load remains nearly constant for large spring
deflection. This gives several advantages:
The tolerances built up in the assembly can
be accommodated without significant change
Length variations through differential
expansion can be accommodated.
Any subsequent axial movement of the
assembly does not alter the preload
These are further advantages in addition to
the elimination of original axial play.