PS Magazine - MAY 1953
PS, The Preventative Maintenance Monthly
ISSUE 12
MAY 1953
A
go guide On what shOUld
get
sUpr-tight
TREaTmeNT
(other
Than where yOu've gO±
mustS
On
²ORque
limi²s)
Is
any
me±aL²T³
mETa´ fasTening Where There
'
s
nO
weave OR tWisT,
and mOs± Of THe
Vibra±iOn is
cUsHiONE.
WHAT ABOUt
±ORQUE WrENCHeS?
And Oµ
The s¶bj·T
O
f ²Orq³e
wreNcheS,
t´ereµs
a
g¸d
¹ºaSn
»HEy'¹E
BEI g
IgnO¹ed
here
as
a
means
OF
gettIµg tHIngs
¼I½Ld¾
¿xed
.
¶OrqUe wreNcHeS ·Nd ²ORq³e
re·dings ¸¹e FINe iN THei¹
PÀaceÁÂ
öT mOı OF The P´aces
YO³
dEÅ´
wiTH
aºeN»² ²He righ² pL·ces.
·u±Om¸±ic devIce wiTh kNOwn
±
eN
-
sIOnÆ what can yO¶ dePeµd Oµ?
ÇOw
caN
yOU
TeÈl
wheµ
ad
J
Uɱ
Ê
mEn±s ÅËe
²he w·Y ²HeY shOuLd
b²
Ìn
Í
the answe¹Îs ¹igh± In the
p·L
m
Of YO³r HaNd wher¼
yO¶
c·N
f³³l i´,
e
ve
N
If yOU
c·n½± descRIb
I±Ï
ÐÑth a ÒiTTle PRactÓce yO¶r
¾¿FÀl" wilÁ
Be ²±er ÃHaN
ÃHe ÄNes²
²Orq³e
wÅeNch
Unde¹ mOst Of The P¹aC±i¾
cal wO KiNg
ÔndItiOns
In
The
±
-
callE ÆÇeldÈÉ
ÕO± Only Can
YO³ ÊËl TH·± ±igHÌ-
nÍsÎ B³T YÏu can See IÐ
Y
O
Ñ
Cŵ
²e
I± in ±eÖs OF
ÒeNgÃHÓ BÔaÑse i²
caµ
µ
Meas¶red×
WheN · ÕOl² Is
±
ig
H²e
n
E
PrOPEØÈyÙwhen IÚÛs tIghT
ÜnO¶gh TO hO´d ±he maXIMÝ ´OÞd
it was
made
TO HOldÖi² will
Ãe
sTßETchàá
×O
b
Of P¹aC±iCaÀ Uâeã
TOØqUe
wreµChes depµd Oµ cONTrOlLä ån¾
D±iOns Ùd lO·d sPcs
w¹i±±eæ FOR
KnOwN
faC±O¹sá çh¹èads
MÑÚ± Be
çhis
ÚTØeTch
Makes
i² TigH±
By
cleaµ and
free Of
B¶Ø¹Áá
¶heY Û³s²
ÊOrcINg
²He ²H¹e¸ds
Of
²He
BOLT
é
ei²HeR
dßy O¹ OIlê dePending Oµ
against ±he Th¹eads Of the n¶të aµd
whIch way the
s
werÜÝ se²
¶Pì
th
e press³re Of
²hread agaiNs²
íh
e
dîal
H¸s
±O é
Re¸d dÑR
Þ
Ng
a
tHre¸d
c¹ea²es
eNOUgH
f¹Ic±iON Be
ß
s±eàdY
P¶ll ´iKe wheµ a µ¶t
OØ BOlá
¶·
the ThReads
±O
hOÒd
±he cONâ
is
ãeiäg
±igh²eNå ÊrOm
ScR·±ch
æ
n¼CtçON ²ighT.
çhE ¹Eading when yO¶ readJ¶s±
·
W
H
è
le
a
B
O
l
±
is
é
Ing »ighTEnEd
Tigh±
éUT OØ BOl± Us³·lLY H¸s
nO
it
ï
s P¶
ð
Òiµg the bOltñhead and T
he
rela±iON êO ±He l
I
s
¸
e
d
sPeC FO¹
Nu² ¸g¸iNs± ±He me±·L BeiNg ëON-
±haT
s·ìe
òTTIµg
wh¼n i²»s í
rs±
n
óô
Ted
õ
bUt at the same Time the
i
µ
s²al
l
Eî ¶hIs is Bï·Use i² ²·kes
me±að is
P¶ÁöINg
±
h
e BOl²ñHÝad and
exùa eòoró ±O
ùea÷ lOOse a µ¶T OË
tHe Nu±
away
ø
çhe BOlT
wilð
nO± be
ôL
t
²h·² H·s SÝT awHIÁeæ
TighT ¶µTiÈ
²He p³LL
is
eq³al ±O ±he
ùhE¹e a¹e maµy Othe¹ factOrs
PUsh
ì
ANd ONlY wheN ±He ôL²
is
that makE úhE TOrqUe wËEnch
OÊ
streTcheD is
²He
PUl´ Oµ
²He ôL²
â
Li²TLe ³õe
TO yO¶û EücEPt when yOUýre
He¸d ·Nd ±he puLl ON tHe Nu± s±rONg
asþemÿlIµg
é¼w
Or r¼BUçÁ± ³NI²Ú
eµO¶gh TO ¿ght the P¶sh fROM The
wiĀ
New N³±s, New ôLÃõö
O¹ f¹Eshly
me²·l BeiNg cONneC²edæ
´h¹³ad³D
and chased āTTINGÁá
çhe waY tO ÿe s¶Re
O÷ ±he BOl²øs
íhEn If
YOu caN»² dePNd
On an
Tig
hT
µ
ess is ±O meas³re I
±
³
s
±
¹e
´
Ch
,
.lL
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