Page 51 - The Tribology Handbook

A8 Ring and disc fed journal bearings

225 mm DIA.

UATE RING DELIVERY

0 500 1000 1500 2000 2500 0 1000 2000 3000
SPEED, rev/min rev/min
Fig. 8.2. Load capacity guidance for self-contained journal bearing assemblies
Disc fed: Ring oiled (2 rings) :
For any diameter work below appropriate limiting curve* For any diameter work below appropriate limiting curve*
(oil film thickness and temperature limits). and avoid shaded areas (inadequate supply of lubricant
from rings).
In these areas disc fed bearings should be used instead.
* These limits assume that the bearing is well aligned and adequately sealed against the ingress of dirt. Unless good alignment is achieved
the load capacity will be severely reduced. In practice, the load is often restricted to 1.5 to 2 MN/mZ (approx. 200 to 300 lbf/in2) to allow for
unintentional misalignment, starting and stopping under load and other adverse conditions.
A8.2