The Washington times., 1918-08-24

as the top OF the connecting rod.
in the brake pedal, clutch and
similar places.
The next type or class OF bear
ing, the ball bearing. is familiar
enough to all car owners, and
consists OF rows Of balls revolv-
ing in metal cages or races. The
ball bearing is the most flexible
and efficient of bearings, and Is
more generally useful, perhaps,
than any other class. The fore
most characteristic Of ball bearings
is their small consumption OF
power As II passes through them.
Ball bearings are divided into
several classes, according to the
form OF races employed, the
function Of the part etc Ball
bearings embodying races in the
form OF rings are known rs annu-
lar bearings Another type has
a race that il L-shaped, the sides
facing the balls, and this type Is
known as cup and cone bearings-
This latter type may be adjusted
for certain conditions, while the
ordinary annular bearing Is nom
adjustable.
Further than this ball bearings
are differentiated in accordance
with the way In which they bear
their loads. The commonly used
designations are radical and
thrust. The radical bears its load
straight down in what may be
called q crushing action, while the
thrust bearing must take q push
ing action. Often these two
functions are united in the
bearing. Beyond this there Is .
further suggestion to be made,
according to whether the bearing
has one or two rows of balls
It need scarcely be pointed out
that ball bearings must be made
with the utmost exactitude, X
they are TO do their work prop
erly. The balls must not vary In
size more than one ten-thou-
sandths Of an inch. II one ball Is
larger than its fellows, IT will re-
ceiVe more of the load than they,
and will probably be crushed in
the process. II one ball In a bear
ing becomes a little worn, II Is
necessary to replace the entire
set, because II the one is replaced
alone, the others in the set have
probably been worn in previous
service, which throws the whole
load on the new ball with disas-
trous results.
The last main class of bearings,
roller bearings, are essentially
the same in function as ball bear
ings, except that steel rollers are
substituted for the steel balls.
There are two subdivisions in the
roller-bearing class, straight roll
ers and tapered rollers. There
are radial and thrust roller bear
ings, and some combining both
functions, just as in ball bearings.
The great virtue OF the roller
bearing is its ability to carry
heavy loads. and for this reason
roller bearings are used In the
axle assembly and in wheels. II
one roller wears, the entire set
must be replaced. for the same
reason that this rule holds in ball
bearings.
The care needed by all bear
ings begins with lubrication-
proper, plentiful. Do not stint
the bearings in the matter
OF lubricant. II Is essential that
dirt, grit or other foreign mat
ter be kept out OF the bear
ing. Water must never be allow
ed to get Into the bearing. II IL
Is necessary to take q bearing
out for any purpose. clean it
thoroughly before you put IL
back in place. When q bearing has
to be frightened In the housing,
be sure that all the nuts are
turned down evenly, or the part
will be cramped. and will refuse
to function properly. The only
satisfactory way OF cleaning
bearings is to wash them thor
oughly in kerosene and then
blow them out with compressed
air, II that is available.
Considering the work they do
the bearings demand very little
attention. Give II to them and
something over. A stitch in time
here saves nine, but a hundred
and nine later on. Be wise and
take the stitch.
Copyright, 1918, by King Features
Syndicate, Inc-)