Page 683 - Rollingbearings

Loads
Calculating the axial
load for bearings

mounted singly or
paired in tandem

When a radial load is applied to a single row
tapered roller bearing, the load is transmit-
ted from one raceway to the other at an
angle to the bearing axis and an internal
axial load is induced. This should be con-
sidered when calculating the equivalent
bearing loads for bearing applications con-
sisting of two single bearing arrangements
and/or bearing pairs arranged in tandem.
Necessary equations for various bearing
applications and load cases are provided in
table 7, page 682. The equations are valid
under the following conditions:

• the bearings are adjusted against each
other to practically zero clearance, but
without any preload
• bearing A is subjected to a radial load F
rA
and bearing B to a radial load F rB
• both F and F are always considered
rB
rA
positive, even when they act in a direction
opposite to that shown in the igures
• the radial loads act at the pressure centres
of the bearings (distance a, refer to prod-
uct tables, page 694)
8
K is the external axial force acting on the
a
shaft or on the housing Load cases 1c and
2c are also valid when K = 0.
a
Values of the calculation factor Y are listed
in the product tables.

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