Page 50 - The Tribology Handbook

Ring and disc fed journal bearings A8

JOURNAL DIAMETER, in
5 6 7 8 3
4001

350C

30QC

2500

C
.E
>
L
d
W
w
a
u) 2000
0
z_
c
E
-1
1500

1000

500
SPECIFIC LOAD 1.5 MNlmZ (APPROX. 2001bf/in2)
BEARING LENGTHIOIAMETER = 1 (NOT INCLUDING DRAIN GROOVES).
CLEARANCE RATIO (MINIMUM) = 0.0015mmlmm EXCEPT FOR RING
OILED BEARINGS GREATER THAN 150mm OlA. WHEN CLEARANCE
RATIO = 0.001mm/mm.

0
80 90 100 110 120 130 140 150 160 170 180 190 200 210 220
JOURNAL DIAMETER, mm
Fig. 8. I. General guide to limiting speed for ring and disc lubricated bearings
Disc fed-wate? cooled: Ring and disc fed- without water cooling :
The above curves give some idea of what can be achieved, For more detailed information see Fig. 8.2. The limiting
assuming there is sufficient oil to meet bearing requirement. speed will be reduced for assemblies incorporating thrust
It is advisable to work well below these limits. Typical location - see Fig. 8.5.
maximum operating speeds used in practice are 75% of the
above figures. A8.1