Maeda MC405C-3 - Page 268

Section 5 – SPECIAL TOOLS AND STANDARD TIGHTENING TORQUE Mini-Crawler Crane M A E D A
5-16 1/2019 MC405C-3
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
Other Bolts
Nominal Size
(Mark “a”)
Width Across Flat
(Mark “b”)
Target Value Tolerance
mm
mm
N·m
kgf·m
N·m
kgf·m
6
10
3.0
0.30
2.6-3.5
0.26-0.35
8
13
7.5
0.75
6.5-8.6
0.65-0.85
10
17
14.5
1.45
12.6-16.7
1.25-1.65
12
19
25.0
2.55
21.7-28.8
2.20-2.95
14
22
40.0
4.10
34.8-46.0
3.55-4.70
16
24
62.5
6.40
54.3-71.9
5.55-7.35
18
27
86.0
8.75
74.8-98.9
7.60-10.0
20
30
122
12.4
106-140
10.8-14.3
22
32
166
16.9
144-191
14.7-19.4
24
36
211
21.5
183-243
18.7-24.7
27
41
309
31.4
269-355
27.3-36.1
30
46
419
42.6
364-482
37.0-49.0
33
50
570
58.0
495-656
50.4-66.7
36
55
732
74.5
636-842
64.8-85.7