Maeda MC405C-3 - Special Tools and Standard Tightening Torque; Accessory Tools; Bolt and Nut Tightening Torque; Standard Tightening Torque List

Mini-Crawler Crane M A E D A Section 5 – SPECIAL TOOLS AND STANDARD TIGHTENING TORQUE
1/2019 MC405C-3 5-15
SPECIAL TOOLS AND STANDARD TIGHTENING TORQUE
Accessory Tools
Contact us or our sales service agency to
request special tools for inspection and
maintenance, when necessary.
Standard Tightening Torque List
Bolt and Nut Tightening Torque
Torque the metric bolts and nuts with no specific
indication to a values shown in this table.
Adequate tightening torque is determined with
respect to a width across flat (b) of a bolt or nut.
Fig. 5-21
Bolts Marked with 8.8 (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
7.8
0.80
6.8-9.0
0.70-0.92
8
13
19.0
1.95
16.5-21.9
1.70-2.24
10
17
37.5
3.85
32.6-43.1
3.35-4.43
12
19
65.5
6.70
57.0-75.3
5.85-7.70
14
22
104
10.6
90.4-120
9.2-12.2
16
24
163
16.6
142-187
14.4-19.1
18
27
224
22.8
195-258
19.8-26.2
20
30
318
32.4
277-366
28.2-37.3
22
32
432
44.0
376-497
38.3-50.6
24
36
549
56.0
477-631
48.7-64.4
27
41
804
81.9
699-925
71.2-94.2
30
46
1090
111
948-1250
96.5-128
33
50
1485
151
1290-1710
131-174
36
55
1910
194
1660-2200
167-223
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