Tightening Torque Chart - Kubota RCK60B-23BX Operator's Manual
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- Instruction manual (6 pages) ,
- Workshop manual (436 pages) ,
- Workshop manual (416 pages)
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24
MAINTENANCE
TIGHTENING TORQUE CHART
Thread
Hexa-Bolt
Size
Head size
d (mm)
B (mm)
13.0 to 15.2
M8
12 or 13
(14.1
28.9 to 33.3
M10
14 or 17
(31.1
46.3 to 53.5
M12
17 or 19
(49.9
79.6 to 92.6
M14
19 or 22
(86.1
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.
American standard cap screws
with UNC or UNF threads
SAE grade No.
(ft-lbs)
17 to 20.5
5/16
(N-m)
23.1 to 27.8
(kgf-m)
2.35 to 2.83
(ft-lbs)
3/8
(N-m)
47.5 to 57.0
(kgf-m)
4.84 to 5.81
(ft-lbs)
1/2
(N-m)
108.5 to 130.2
(kgf-m)
11.06 to 13.28
(ft-lbs)
110 to 132
9/16
(N-m)
149.2 to 179.0
(kgf-m)
15.21 to 18.25
(ft-lbs)
150 to 180
5/8
(N-m)
203.4 to 244.1
(kgf-m)
20.74 to 24.89
No mark
ft-lbs
N-m
17.8 to 20.6
1.1)
(19.2
1.4)
39.3 to 45.1
2.2)
(42.2
2.9)
62.8 to 72.6
3.6)
(67.7
4.9)
107.9 to 125.5
6.5)
(116.7
8.8)
GR.5
GR.8
24 to 29
32.5 to 39.3
3.31 to 4.01
35 to 42
45 to 54
61.0 to 73.2
6.22 to 7.46
80 to 96
110 to 132
149.2 to 179.0
15.21 to 18.25
160 to 192
217.0 to 260.4
22.13 to 26.55
220 to 264
298.3 to 358.0
30.42 to 36.51
kgf-m
ft-lbs
1.9 to 2.1
17.5 to 20.3
(2.0
0.1)
(18.9
1.4)
4.0 to 4.6
35.4 to 41.2
(4.3
0.3)
(38.3
2.9)
6.4 to 7.4
57.1 to 66.5
(6.9
0.5)
(61.8
4.7)
11.0 to 12.8
91.1 to 108.5
(11.9
0.9)
(99.8
8.7)
Metric cap screws
Property class
(ft-lbs)
M8
(N-m)
(kgf-m)
(ft-lbs)
M10
(N-m)
(kgf-m)
(ft-lbs)
M12
(N-m)
(kgf-m)
(ft-lbs)
M14
(N-m)
(kgf-m)
(ft-lbs)
M16
(N-m)
(kgf-m)
7T
N-m
kgf-m
23.5 to 27.5
2.4 to 2.8
(25.5
2.0)
(2.6
48.1 to 55.9
4.9 to 5.7
(52.0
3.9)
(5.3
77.6 to 90.2
8.0 to 9.2
(83.9
6.3)
(8.6
123.6 to 147.0
12.6 to 15.0
(135.3
11.7)
(13.8
class 8.8
class 10.9
17.4 to 20.2
21.7 to 25.3
23.6 to 27.4
29.4 to 34.3
2.4 to 2.8
3.0 to 3.5
35.5 to 41.2
44.9 to 52.1
48.1 to 55.8
60.8 to 70.5
4.9 to 5.7
6.2 to 7.2
57.2 to 66.5
76.0 to 86.8
77.5 to 90.1
103 to 117
7.9 to 9.2
10.5 to 12.0
91.5 to 108.4
123 to 144
124 to 147
167 to 196
12.6 to 15.0
17.0 to 20.0
145 to 166
192 to 224
196 to 225
260 to 303
20.0 to 23.0
26.5 to 31.0
0.2)
0.4)
0.6)
1.2)
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