PS Magazine - OCTOBER 1984
PS, The Preventative Maintenance Monthly
ISSUE 383
OCTOBER 1984
Metric
Metric capscrews are marked with a
property class number.
A
higher
numBer means a stronger screw that
will take more torque±
There are 7 prOperty classes±
THE
S± h²Ds
OF ³´µ
3Com¶·N
¸La¹º»¼
½¾ ¿ÀRKÁd
lIk à .ÄÅ
PrÆpeÇÈy ÉÊËÌÌ
r R
L
5.8
± f
l
²³´µ
¶ m
·
10¸9
¹
Use the torque called for in the TM² IF noth³ng ³s speciFied, use this chart
For screws With M-proFile threads²
PÇÆpertY ÍÎËÌÌ
Ql.'!±.t²³´.Pµ¶·-¸¹º.»L ¼¼¼¼¼¼¼¼¼ ½:¾{¿ÀÁ ¼¼¼¼¼¼ ü¼¼¼¼¼ ÄÅƼ(ÇÈɼ .
.....
....
.
1ÊËÌÍÎ9ÍÏÐÑÍ
N.m
lb-ft
5
x
0.8
5
3
6
x
1
8
6
8
x
1±25
19
14
10
x
1²5
37
28
12
x
³´7
6µ
¶8
14
x
2
104
77
³6
x
2
·
162
120
20
x
2¸5
317
233
24
x
3
54¹
¶03
These charts are Based on us³ng
clean, dry threads² Reduce the torQue
By 20
%
when oil is used as a luBricant±
IF you thread a steel capscrew into
aluminum and steel inserts arC not
used, reduce torQue values By one hal´²
N±m
lb²ft
n³m
lb´ft
6
4
8
6
10
7
14
10
25
20
35
25
55
4º
75
55
90
65
125
90
145
105
2º5
»
150
220
¼60
3º0
225
450
325
650
475
800
6ºº
³025
750
hereµ¶¶
±
Ò
·¸¹ºoT
Measure
.
.
²
•
hereL
Get the size oF the capscrew By mµeasuring the shaNk, not the head² Some
mechanic¶ have done th³s, and haVe overtorQued the capscrews² ·F you have
steel hex nuts oF d¸¹ferEnt thicknessºs, always use the th¸ckest With Grade 8
capscrews² You need ¸t Because oF the h³gher tor»ue these capscrews take²
6
OCT 84
WHE»l B»ARi¼g ½Ock¼Ut W¾»¼cH»S ¿¿À
Lock Up a Replacement
·¼steaD oF rePlac³ng the ½omplete
wheel Bear³ng locknut socket set, ¾S¾
5120¿00-169À4586, when you lose or
Break a socket, just oÁder tHe socket you
need²
The socket set is part oF the ¾oÂ
Ï
Ãommon sÄop set, But SÃ 4910À95ÀÃLÅ
A
74 only lists a couÆle oF ³ndividual
sockets² Çere's a complete rundown:
PÁ
ÂIze
PoIºTs ÁÂÁ
º120
(IºChes)
1901
2 3/32
6
-01-144-5328
1902
2 3/8
6
-01½106-0085
1903
2 3/8
8
½01½144-5329
1904
2 9/16
6 ½¾½¿À4½ÁÂÃ
1905
2 9/16
8
½01½144-5330
1906
3
6
½01½173-1425
1907
3
8
½00½104-4076
³908
3 ³/4
6
-01Ä1¶4Å5331
1909
3 ³/4
8
-01½1¶4Æ5321
1910
3 1/2
6
½01½14¶-5322
1911
3 1/2
8
-01-1¶4½5323
1912
3 7Ç8
6
Ã0ÄÅÆÇ9È86
1913
3 7Ç8
8
½01½14¶½5324
³914
4
6
-0³-090½9319
1915
4 1/8
6
½01½145½5793
³916
4 3/8
6
-01½144½5325
1917
4 3/8
8
½01½14¶-5326
1918
4 7Ç8
6
½01½089-9067
ÈÉ9
4 7/8
8
Ê01-145-7 459
Èhe SÃ descr³Bes the 3 É /8-³n, 6ÀPt
socket, ¾S¾ 5120À00-009-8602, as a
3/8-³n s»uare dr¸ve² ThatÊs wrong² ·tÊs
·,.
a 3/4˳n sQuare dr³ve l³ke the rest oF tÌÍÎ
sockets²
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