Komatsu PC12R-8, Operation & Maintenance Manual

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DRIVING TORQUES FOR SCREWS AND NUTS
4.4 DRIVING TORQUES FOR SCREWS AND NUTS
4.4.1 STANDARD DRIVING TORQUES
4.4.2 SPECIFIC DRIVING TORQUES
IMPORTANT
☞
•
This driving torque table is not valid for screws or nuts that must lock parts made of nylon or similar
materials onto washers or components made of nylon or nonferrous materials.
★
Nm (Newton metre): 1 Nm = 0.102 kgm
Thread
diameter (mm)
Pitch
(mm) Spanner size
(mm)
8.8 10.9
kgm Nm kgm Nm
6
8
10
12
14
1
1.25
1.5
1.75
2
10
13
17
19
22
0.96 ± 0.1
2.3 ± 0.2
4.6 ± 0.5
7.8 ± 0.8
12.5 ± 1
9.5 ± 1
23 ± 2
45 ± 4.9
77 ± 8
122 ± 13
1.3 ± 0.15
3.2 ± 0.3
6.5 ± 0.6
11 ± 1
17.5 ± 2
13.5 ± 1.5
32.2 ± 3.5
63 ± 6.5
108 ± 11
172 ± 18
16
18
20
22
24
2
2.5
2.5
2.5
3
24
27
30
32
36
19.5 ± 2
27 ± 3
38 ± 4
52 ± 6
66 ± 7
191 ± 21
262 ± 28
372 ± 40
511 ± 57
644 ± 70
27 ± 3
37 ± 4
53 ± 6
73 ± 8
92 ± 10
268 ± 29
366 ± 36
524 ± 57
719 ± 80
905 ± 98
27
30
3
3.5
41
46
96 ± 10
131 ± 14
945 ± 100
1287 ± 140
135 ± 15
184 ± 20
1329 ± 140
1810 ± 190
ITEM DESCRIPTION kgm Nm
Engine Front support central screw
Rear support central screw 5.5 ± 0.5
5.5 ± 0.5 54 ± 5
54 ± 5
Engine supports Screws for fastening to the engine 6.5 ± 0.5 64 ± 5