Page 300 - The Tribology Handbook

Selection of lubricant twe c1

Table 1. P importance of lubricant properties in relation to bearing type
Lubricant propeirty \ bearing bearing closed gear' ropes, chainr, etc. Clock and Hinges, slides,
?jpe of component Plain journal
Open gears,
latches, etc.
inrtrument piuots
1. Boundary lubricating properties + ++ +++ ++ ++
~~ ~ ~~ ~
2. Cooling ++ ++ +++ - -
+ ++ ++ - ++
3. Friction or torque
+ ++ - + +++ +
4. Ability to remain in bearing
5. Ability to seal out contaminants, - ++ - + +
+ ++ ++ + +
6. Temperature range
+ ++ - ++ - +
7. Protection against corrosion
+ + - ++ ++ +
8. Voiatility

Note: The relative importance of each lubricant property in a particular class of component is indicated on a scale from + + + =
highly important to - = quite unimportant.

Speed, ft/min -

2 10 100 1000 10000 100 000

7 00 (330

.
10000
E
5

1000

100

Speed at bearing contact, mm/s -t
Figure 1.1 SpeedAoad limitations for different types of lubricant
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