Maeda MC285C-3 - Page 228

Section 5 – SPECIAL TOOLS AND STANDARD TIGHTENING TORQUE Mini-Crawler Crane M A E D A
5-12 1/2019 MC285C-3
Bolts Marked with 10.9 (Strength Classification) on Head
Nominal Size
(Mark “a”)
Width Across
Flat
(Mark “b”)
Target Value
Tolerance
mm
mm
N·m
kgf·m
N·m
kgf·m
6
10
11.0
1.1
9.4-12.7
0.93-1.26
8
13
27.0
2.7
23.0-31.1
2.3-3.10
10
17
53.0
5.4
45.0-61.0
4.6-6.21
12
19
93.0
9.5
79.0-107
8.10-10.9
14
22
148
15.1
126-170
12.8-17.4
16
24
231
23.5
196-266
20.0-27.0
18
27
317
32.3
269-365
27.5-37.1
20
30
450
45.9
383-518
39.0-52.8
22
32
612
62.4
520-704
53.0-71.8
24
36
778
79.3
661-895
67.4-91.2
27
41
1130
116
961-1300
98.6-133
30
46
1540
158
1310-1770
134-182
33
50
2100
214
1790-2410
182-246
36
55
2700
275
2300-3100
234-316
Bolts Marked with 12.9 (Strength Classification) on Head
Nominal Size
(Mark “a”)
Width Across
Flat
(Mark “b”)
Target Value
Tolerance
mm
mm
N·m
kgf·m
N·m
kgf·m
6
10
13.0
1.30
11.1-15.0
1.11-1.50
8
13
31.5
3.20
26.8-36.2
2.72-3.70
10
17
62.5
6.40
53.1-71.9
5.44-7.35
12
19
109
11.1
92.7-125
9.44-12.8
14
22
174
17.7
148-200
15.0-20.4
16
24
271
27.7
230-312
23.5-31.9
18
27
373
38.1
317-429
32.4-43.8
20
30
529
54.0
450-608
45.9-62.1
22
32
720
73.4
612-828
62.4-84.4
24
36
915
93.3
778-1050
79.3-107
27
41
1340
136
1140-1540
116-156
30
46
1820
185
1550-2090
157-213
33
50
2470
252
2100-2840
214-290
36
55
3180
324
2700-3660
275-373