SKF - Rolling Bearings

9 CARB toroidal roller bearings
Calculating the permissible axial displacement
Limited by the displacement of the roller
set
Limited by the reduction of internal
clearance
When the bearing rings are not misaligned,
the axial displacement is limited by the values
s 1 or s 2 († figs. 8 and 9, page 968).
The axial displacement for a maximum clearance
reduction can be estimated using:
JJJ
7 B C
s red
cle = JJJ
p k 2
When the bearing rings are misaligned, the
axial displacement values s 1 or s 2 must be
reduced:
s rol = s 1 – k 1 B a or s rol = s 2 – k 1 B a
The clearance reduction caused by a certain
axial displacement can be estimated using:
k 2 s cle
2
C red = JJJ B
Calculation example 1
What is the maximum axial displacement the
roller set permits for a C 3052 bearing when
the bearing rings are misaligned by a = 0,3°?
Calculation example 2
What is the maximum axial displacement for a
C 3052 bearing if a maximum internal clearance
reduction of 0,15 mm is permitted?
s rol = s 1 – k 1 B a
s rol = 19,3 – 0,122 ¥ 104 ¥ 0,3 = 15,5 mm
JJJ
7 B C
s red
cle = JJJ
p k 2
JJJJJ
7 104 ¥ 0,15
s cle = JJJJJ = 12,7 mm
p 0,096
See also diagram 1 († page 969).
Calculation example 3
What internal clearance reduction does an
axial displacement from the central position of
6,5 mm cause in a C 3052 bearing?
k 2 s cle
2
C red = JJJ B
0,096 ¥ 6,5 2
C red = JJJJJK = 0,039 mm
104
See also diagram 1 († page 969).
970