Kubota ZG123S-AU, Operator'S Manual

Page: 78 / 85

63 ADJUSTMENT
GENERAL TORQUE SPECIFICATION
TIGHTENING TORQUE CHART
American standard cap screws
with UNC or UNF threads
Metric cap screws
SAE grade No.
GR.5 GR.8
Property class
Class 8.8 Class 10.9
1/4
(N-m)
(kgf-m)
10.7 - 12.9
1.11 - 1.33 16.1 - 19.3
1.66 - 1.99
M6
(N-m)
(kgf-m)
9.81 - 11.3
1.0 - 1.15
5/16
(N-m)
(kgf-m)
23.1 - 27.8
2.35 - 2.84 32.5 - 39.3
3.31 - 4.01
M8
(N-m)
(kgf-m)
23.6 - 27.4
2.4 - 2.8
29.4 - 34.3
3.0 - 3.5
3/8
(N-m)
(kgf-m)
47.5 - 57.0
4.84 - 5.82 61.0 - 73.2
6.22 - 7.47
M10
(N-m)
(kgf-m)
48.1 - 55.8
4.9 - 5.7
60.8 - 70.5
6.2 - 7.2
1/2
(N-m)
(kgf-m)
108.5 - 130.2
11.07 - 13.29 149.2 - 179.0
15.22 - 18.27
M12
(N-m)
(kgf-m)
77.5 - 90.1
7.9 - 9.2
103 - 117
10.5 - 12.0
9/16
(N-m)
(kgf-m)
149.2 - 179.0
15.22 - 18.27 217.0 - 260.4
22.14 - 26.57
M14
(N-m)
(kgf-m)
124 - 127
12.6 - 15.0
167 - 196
17.0 - 20.0
5/8
(N-m)
(kgf-m)
203.4 - 244.1
20.75 - 24.91 298.3 - 358.0
30.44 - 36.53
M16
(N-m)
(kgf-m)
196 - 225
20.0 - 23.0
260 - 303
26.5 - 31.0
Thread
size
d (mm)
Hexa-Bolt
Head size
B (mm)
No mark 7T
N-m kgf-m N-m kgf-m
M8 12 or 13
17.8 - 20.6
(19.2 1.4)
1.9 - 2.1
(2.0 0.1)
23.5 - 27.5
(25.5 2.0)
2.4 - 2.8
(2.6 0.2)
M10 14 or 17
39.3 - 45.1
(42.2 2.9)
4.0 - 4.6
(4.3 0.3)
48.1 - 55.9
(52.0 3.9)
4.9 - 5.7
(5.3 0.4)
M12 17 or 19
62.8 - 72.6
(67.7 4.9)
6.4 - 7.4
(6.9 0.5)
77.6 - 90.2
(83.9 6.3)
8.0 - 9.2
(8.6 0.6)
M14 19 or 22
107.9 - 125.5
(116.7 8.8)
11.0 - 12.8
(11.9 0.9)
123.6 - 147.0
(135.3 11.7)
12.6 - 15.0
(13.8 1.2)
A
Figure "7" on the top of the bolt indicates that the bolt is of special material.
A
Before tightening, check the figure on the top of bolt.