Page 186 - Improving Machinery Reliability
P. 186
Machinery Reliability Audits and Reviews 157
.
I
Figure 3-46. Application of gage load to axially pre-loaded bearings will show gap
between inner races. (Courtesy MRC Bearings.)
allowed for radial or Conrad bearings. An interference fit near the typical maximum
allowable is almost certain to result in greatly reduced life of these bearing sets.
In this regard, Figure 3-47 will prove very enlightening. It shows that for a given
bearing (FAG 7314, 70 mm bore diameter) a shaft interference fit of 0.0003 in. will
I .mo
8
!I '.
$ 4
I
I;
tl
IW
I /
4 /
/
4
I
UOUWIED PRELOAD y6 Fn
rrvI ,,I.~UOANo",IRCOHI*CI UEa1(*011
IO
O I 2 I 4 5 6 > 8 Y 1 0 1 4 I I