Page 332 - The Tribology Handbook

c7 PI a i n bea ri ng I u b ri cat i on

I Direction of load
Rotation Housing
Fixed Variable

@
AXIAL* W
GROOVE CIRCUMFERENTIAL GROOVE

Unit

Unidirectional
W

Split

AXIAL*
GROOVES w CIRCUMFERENTIAL GROOVE

Reversible Unitlsplit

* At moderate speeds oil holes may be substituted if l/d does not exceed 1.
Note: the load-carrying capacity of bearings with circumferential grooves is somewhat lower than with axial grooves owing to the effect
of the groove on pressure generation.
Figure 7.3 Oil grooves in journal bearings

c7.4