LUBRICATION 267

If the oil supply is limited, the oil not wet the

bearing but form an oil pad in the of Off, the of

course reaching a zero value at the the oil

meets the bearing surface. If d is the of the oil film

outside of the pad, the quantity up to the pad per

second will be Ud, and the quantity the

JlfuWi where the velocity varies uniformly Is If lX'l 17/2, and
there is no accumulation of oil, these two be

and

Jf uZV, = 2ci
also If 2AT2 = 2d

Case IF. EevoMng Cylindrical also Cylin-

drical.—In a very common example of we a

cylindrical journal partly or wholly surrounded the

or "brass" CD in Fig. 85. The oil is drawn up into the BD

FIG. 85.—The lubricated journal and bearing.
and creates a pressure which is a maximum at Q. The of
nearest approach between journal and is at
middle of the bearing 0 but at a point some 40° further on
at G toward the so-called "off-side" of the This is
the opposite to what happens in the unlubricated bearing, for