Flex Cut RMR 230 H
4 Machine description
05 | 2021
846 99 01
–
003
29
4.3.2
Torques for metric screws
Class and
markings of the
screw heads
Class and
markings of the
nuts
Size
Class 4.8
Class 8.8 oder 9.8
Class 10.9
Class 12.9
Lubricated *
Dry **
Lubricated *
Dry **
Lubricated *
Dry **
Lubricated *
Dry **
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
lb-ft
M6
4,8
3,5
6
4,5
9
6,5
11
8,5
13
9,5
17
12
15
11,5
19
14,5
M8
12
8,5
15
11
22
16
28
20
32
24
40
30
37
28
47
35
M10
23
17
29
21
43
32
55
40
63
47
80
60
75
55
95
70
M12
40
29
50
37
75
55
95
70
110
80
140
105
130
95
165
120
M14
63
47
80
60
120
88
150
110
175
130
225
165
205
150
260
190
M16
100
73
125
92
190
140
240
175
275
200
350
255
320
240
400
300
M18
135
100
175
125
260
195
330
250
375
275
475
350
440
325
560
410
M20
190
140
240
180
375
275
475
350
530
400
675
500
625
460
800
580
M22
260
190
330
250
510
375
650
475
725
540
925
675
850
625
1075
800
M24
330
250
425
310
650
475
825
600
925
675
1150
850
1075
800
1350 1000
M27
490
360
625
450
950
700
1200
875
1350
1000
1700
1250
1600
1150
2000 1500
M30
675
490
850
625
1300
950
1650
1200
1850
1350
2300
1700
2150
1600
2700 2000
M33
900
675
1150
850
1750
1300
2200
1650
2500
1850
3150
2350
2900
2150
3700 2750
M36
1150
850
1450
1075
2250
1650
2850
2100
3200
2350
4050
3000
3750
2750
4750 3500
The torques in this table are guidelines and do NOT apply where a
different torque for certain screws or nuts is given in this
instruction manual. Check tightness of fasteners periodically.
Shear bolts are designed to fail under predetermined loads.
Always replace shear bolt with identical property class.
Fasteners should be replaced with the same or higher property
class. If higher property class fasteners are used, these should
only be tightened to the strength of the original.
Make sure fasteners threads are clean and that you
properly start thread engagement. This will prevent them
from failing when tightening.
Tighten plastic insert or crimped steel-type lock nuts to
approximately 50 % of the dry torque shown in the chart,
applied to the nut, not to 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 lubri-
cation.