Standard Tightening Torque Table - Komatsu WA430-6 Shop Manual

SEN00833-04

Standard tightening torque table

1. Table of tightening torques for bolts and nuts
a Unless there are special instructions, tighten metric nuts and bolts to the torque below.
a The following table applies to the bolts in Fig. A.
Thread diameter of bolt
mm
6
8
10
12
14
16
18
20
22
24
27
30
33
36
39
a The following table applies to the bolts in Fig. B.
Thread diameter of bolt
mm
6
8
10
12
a
Fig. A
Remarks: The widths across flats against the thread diameters of flanged bolts (marks with "*") in Fig. A are
the ones indicated in the table for bolts shown in Fig. B.
(Values of tightening torques shown in the table for Fig. A are applied.)
32
Width across flats
mm
10
13
17
19
22
24
27
30
32
36
41
46
50
55
60
Width across flats
mm
10
12
14
17
Tightening torque
Nm
11.8 – 14.7
27 – 34
59 – 74
98 – 123
157 – 196
245 – 309
343 – 427
490 – 608
662 – 829
824 – 1,030
1,180 – 1,470
1,520 – 1,910
1,960 – 2,450
2,450 – 3,040
2,890 – 3,630
Tightening torque
Nm
5.9 – 9.8
13.7 – 23.5
34.3 – 46.1
74.5 – 90.2
a
Fig. B
00 Index and foreword
1
kgm
1.2 – 1.5
2.8 – 3.5
6.0 – 7.5
10.0 – 12.5
16 – 20
25 – 31.5
35 – 43.5
50 – 62
67.5 – 84.5
84 – 105
120 – 150
155 – 195
200 – 250
250 – 310
295 – 370
kgm
0.6 – 1.0
1.4 – 2.4
3.5 – 4.7
7.6 – 9.2
WA430-6