Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1921-01-02
s|MPL|F|ED LESSONS IN
CARE OF THE AUTOMOBILE
Engine hearings Almost Cnivcr-
sally Of Babbitt or Bronze
Tynr
ny FtEDEnICk &. GUEnRLICH.
Lesson No. .o5.
fail and RoIicr lfsnrIurs

Lesson No. .25.
Iinii and RoIicr Hearings.
The bearings used in the, engine
arc almost universally Of the bah
DIT or bronZ" type. the ball or roll
or bearing seldom being used. ON.
reason Tor this is that an engine
bearing is subjected Ia considerable
neat. and this heat might result In
The expansion Of the balls or roll
lcrs che cl"aranccs of which arc
extremely smalD. and so cause
blndlnS. Again. most Of the engine
bearings are constantly subjected 10
blows under which th" hardened
baiis or rollers or their raccways
on almost all other parts Of the
automobile. the ball or roller bear
ing ~ generally used. there seldom
being found the babbit or bronze
bearing. excepting where the move
mcht IL but slight. as in tn" uni
vcrsai joints. spring saddles ana
aNlcs. spring shnckics. etc.
As Was said before. parts can move
on one another IN tire" WAYS. name
Is linealiy or in line. AK. for "x-
ample, ttc i'stons. they can re-
No!Vc one IN IN" other. as tn" trans
mission gear shafts. or TWO fiat sur
faces can spin 81 r"volv" on one am
other AZ ia the latter case. the pres
sure Is In tn. form Of II thrust. the
, n"nrins used is call-d thrust
second case are called journal bear
ings."
Figures ! and > show :, bali bear
Ing as IS used in Ia" transmission.
din"r,nttal. wheels, .tc. Here y is
the outer iaccway, I! III" inner race
way the balls aud - the bail 70"
tainer. or cage. when these bear
lngs are worn or broken. about tho
only tiIinT that can j.. don" is 10 re
place them. The writer does not
advis" repairing; them
About the only car" these bearings
reIulrc IS fabrication. ana .Ntrcm"
ne, 81 lfsl .s IA, ,sf
metal goes into the hearing. IL may
result ia the crushing OF tho balls
ana .raccway This would be indi-
Gated by Il scratching sort OF noise
when the ear ~ running
Figure ? shows what ~ known as
q radaN hall bearing. This typ" OF
bcnrin'; is usually found in the front
wheels. Noyiccs. when putting the
wheel hack after rr.as!nS tn. bear
Ing, sometimes make TIA. mistak. OF
getting The balls and their retainer
wh"r" Is should hc. The FAC, tha; y
Is larger than u. naturally leads to
the belief that IL should com" 10 the
larger outer raccway. When this ls
don. tho bearing viii likely be ruin
si.
figur" shows an excellent type
Of roller hearing --th" liyatt ncNah bile.
II IA" roller az q roller bearing were
to tax. :, position which is not ALSO
lntcly parallel to It's shaft. 1t would
he subjected 10 81 beading strain. for
which ras"n . plain solid roller *
!o' practical In bearing ~ the
Hyatt bearing - designed. the roller
can bond without breathing IN"
Hyatt bearings VIII l." found In a very
large p"rC"ritul" ~ the ears hunt.
Another "S'"ilcn, and much used
roller b"ariUN So tn" Timkcm. whi,h
has sh"rt-taper'd rollers. - u is
designed. ~ VIII al so a'i 80 a thrust
bearing jo some extent Because uf
tho tnpcr. wear IAN 10" taken out by
simply tightening IA" nuts which hold
IA" bearing IN place. When tighten
ing bearings az the al Unstable iypc.
the wheels must D." jucE"i NJ, and
tn" bearing frightened as much Us
possible without m1kinG IT impoSsi-
he TO spim the whe"! by hand. The
wheel must not bind"
Figure + shows IA ball-thrust bear
Ing. Her" y and !. are tn. race
WAYS and tho retainer with It's
"rrowi' which develops in the trans.
mission and ia" dihcrential is due "a
IA" worn hearings. az when the bear
permit the gears 10 bccom" Il little
TOO far apart hat they viii allow
u certain amount, "f sid: play of the
\ shaft.
The way TO toll II Gearing OF the
typr shown in Figs. and Is worn.
IS to see how much tn" iuu"r race
WAY u can be moved Sideways with
respect TO the outer racewav. You
can't judge this. Well hy trying 10
move th" raccways toward one an
other.
To repair = worn inu hearing the
rac"ways must be r"ground ana
larger halls inserted. Whether or
not, therefore. It pays 10 has" - bear
Ing repaired is questionable. IT VIII
Il" weakened. an! the repair is rN-
pcnSiN".
Uo,h the rac.ways ana TIA. balls
are hardened and. therefore. briitl,.
u some extent. This means that
care must b" exercised in Installing
them. They should never b" driven
into position ly hard blows Of a ham
gentle tapp!nE on u soft TOO! or piece
Of metal Viii generally move them.
though tn" movement VIII often hc
glow ana the work rcuuir" patience.
Many hearing has been ruined be-
cause one OF tho raCcwuys was crack
ed when the bearing was Installed.
When ordering roller bearings il
is only necessary TO give their NUN :
Der, which viii he found on one OF
the raceways. II YOU find a number
Of numbers, and so do not feel GER
tain OF the right one. give the III
mansions. hut the numbers also as
the number Will help the dealer to
give you the correct bearing even
though YOU may have failed To give
all Of the dimensions required
Rust is - great enemy of ball hear
for some time. be sure that all roller
and ball bearings are Well creased.
g As YOU helped me on, h.f,r. I
thought / would write 20 you tot, adIic.
again.
have 1917 Chevrolet car. in first
class order. except that lately She has a.
vrlnpcd loud and disagr-cablr rrnwIiu,
and hmmm!ns no!se ! lhin.s in The dit