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Weifang 495 - Page 72

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ing
table:
Journal
Diameter(mm)
Bearing
Shell
Thickness
(mm)
Dimensional
Main
I
Connecting
Dimensional
Main
Connecting
calss
class
symbol
journal
1
rod
joural
Symbol
bearing
rod
bearing
I
0
i-
75-
0
•
019
65-
0
•
019
0
3
-0.035
2.
s=g:gi~
-0.050
PI
74.75-
0
•
019
64.
75-
0
.
019
-0.25
3.
12S:g:
g~g
2.
625=g:g~
P2
74.
5-
0
•
019
I
64.
5-
0
.
019
-0.50
3.
25:8:
g~~
2.
75:g:g~~
I
P
3
74.
25-
0
.
019
64.
25-
0
.
019
-0.75
3.
375:g:
g~g
2.
875:g:g~~
I
p
..
74-
0
.
019
64-
0
.
019
-1.
00
3.
5=g:g~g
3-
0
.
020
-0.035
P
s
73.5-
0
.
019
63.
5-
0
.
019
I
-1.50
3.
7S:g:
g~g
I
3. 2S:g:
g~~
I
Clearance:
Main
journal
and
bearing
o.
070~
o.
154;
Connecting
rod
journal
and
bearing
0.·040·--0. 108
B.
After
reconditioning
.
the
crankshaft,
t.he
crank
radius
should
be
kept
in
5·7
..
5 +
o.
05mm;
the
fillet
radius
of
the
crankshaft
journal
should
be
of
5
mm
,t,he
ovality
and
the
taper
of
the
crank
- s11aft
journal
should
be
within
o.
015
mm.
It
is
permit-
ted
that
the
dimensional
class
of
reconditioning
of
the
main
jour-
nals
may
be
different
from
that
of
the
connecting
rod
journals.
But
the
reconditioned
dimensions
of
all
the
main
journals
or
connecting
rod
journals
must
be
unified
in
the
same
class
respectively.
C.
It
is
strictly
forbidden
to
recover
the
bearing
clearance
by
me~ns
of
filing
or
shimming
the
bearing.
D.
When
the
axial
play
of
the
crankshaft
exceeds
the
wear
limit
,a
thickened
thrust
ring
should
be
adopted
to
meet
the
speci-
fied
value
of
o.
07 -
o.
23mrn.
E.
When
the
connecting
rod
is
corrected
by
means
of
a
correc-
tor,
the
relative
unparallelism
between
the
centre
lines
of
both
con-
ne'ctin-g
rod
and
bores
in
.any
direction
should
be
less
than
o.
05/100
37

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