BRUSCHCUTTERS DS 2200 - DS 2400
pag.
11
Workshop manual
3. FASTENER TORQUES
3.2 Imperial inch Fastener Torque Values
Grade 1
Grade 2b
Grade 5, 5.1 or 5.2
Grade 8 or 8.2
Lubricated a
Dry a
Lubricated a
Dry a
Lubricated a
Dry a
Lubricated a
Dry a
SIZE
N●m
lb-ft
N●m
lb-ft
N●m
lb-ft
N●m
lb-ft
N●m
lb-ft
N●m
lb-ft
N●m
lb-ft
N●m
lb-ft
1/4
3.7
2.8
4.7
3.5
6
4.5
7.5
5.5
9.5
7
12
9
13.5
10
17
12.5
5/16
7.7
5.5
10
7
12
9
15
11
20
15
25
18
28
21
35
26
3/8
14
10
17
13
22
16
27
20
35
26
44
33
50
36
63
46
7/16
22
16
28
20
35
26
44
32
55
41
70
52
80
58
100
75
1/2
33
25
42
31
53
39
67
50
85
63
110
80
120
90
150
115
9/16
48
36
60
45
75
56
95
70
125
90
155
115
175
130
225
160
5/8
67
50
85
62
105
78
135
100
170
125
215
160
215
160
300
225
3/4
120
87
150
110
190
140
240
175
300
225
375
280
425
310
550
400
7/8
190
140
240
175
190
140
240
175
490
360
625
450
700
500
875
650
1
290
210
360
270
290
210
360
270
725
540
925
675
1050
750
1300
975
1-1/8
470
300
510
375
470
300
510
375
900
675
1150
850
1450 1075 1850 1350
1-1/4
570
425
725
530
570
425
725
530
1300
950
1650 1200 2050 1500 2600 1950
1-3/8
750
550
950
700
750
550
950
700
1700 1250 2150 1550 2700 2000 3400 2550
1-1/2 1000
725
1250
925
990
725
1250
930
2250 1650 2850 2100 3600 2650 4550 3350
DO NOT use these hand torque values if a different
torque value or tightening procedure is given for
a specific application. Torque values listed are for
general use only and include a ±10% variance
factor. Check tightness of fasteners periodically.
DO NOT use air powered wrenches.
Shear bolts are designed to fail under
predetermined loads. Always replace shear bolts
with identical grade.
Fasteners should be replaced with the same
grade. Make sure fastener threads are clean and
that you properly start thread engagement. This
will prevent them from failing when tightening.
When bolt and nut combination fasteners are
used, torque values should be applied to the NUT
instead of the bolt head.
Tighten toothed or serrated-type lock nuts to the
full torque value.
“Lubricated” means coated with a lubricant
such as engine oil, or fasteners with phosphate
and oil coatings.
“Dry” means plain or zinc plated without any
lubrication.
“Grade 2” applies for hex cap screws (Not Hex
Bolts) up to 152 mm (6 in.) long. “Grade 1”
applies for hex cap screws over 152 mm (6
in.) long, and for all other types of bolts and
screws of any length.
a.
b.
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