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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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