2 - 18
TECHNICAL DATA
TIGHTENING TORQUES
TIGHTENING TORQUES AND RELEVANT PRELOADS FOR STANDARD CONNECTIONS
The values provided in the following table refer to standard tightness, i.e. metric screws coupled with relevant nut or with lead screw
in metal.
The parts to be tightened together must be in metal or suffi ciently rigid not to need the insertion of bushing or shims.
Coupling must always use lightly oiled or greased threads; alternatively, the type of thread lock paste required will be indicated
Axial preloads, related to tightness torques, have been increased by 10% on the calculated value to take into account the tolerance
on the nominal torque and the changes that the friction coeffi cient may undergo between tightening operations.
(*) The metric screw indicated has a fi ne pitch.
CLASS 8.8
SCREW
CLASS 10.9
CLASS 12.9
TIGHTENING
TORQUE
[Nm]
M4 X 0.7
3
3.870
4.2
5.420
5.2
6.710
M5 X 0.8
6
6.350
7.5
7.930
9
9.520
TIGHTENING
TORQUE
[Nm]
AXIAL
PRELOAD
[N]
AXIAL
PRELOAD
[N]
TIGHTENING
TORQUE
[Nm]
AXIAL
PRELOAD
[N]
M6 X 1
10
8.860
13
11.520
16
14.180
M8 X 1.25
22
14.900
30
20.330
40
27.100
M8 X 1 (*)
25
17.280
36
24.890
45
31.110
M10 X 1.5
45
24.680
65
35.640
80
43.870
M10 X 1.25 (*)
50
27.870
70
39.013
85
47.380
M12 X 1.75
80
37.640
110
51.750
135
63.510
M12 X 1.5 (*)
85
40.547
120
57.250
145
69.170
M12 X 1.25 (*)
90
43.550
130
62.900
150
72.580
M14 X 2
130
52.670
185
74.800
220
88.950
M14 X 1.5 (*)
150
62.900
205
85.960
245
102.780
M16 X 2
200
74.070
280
103.690
335
124.060
M16 X 1.5 (*)
225
86.140
310
118.680
360
137.820
M18 X 2.5
265
83.650
370
116.790
450
142.040
M18 X 1.5 (*)
320
104.900
450
147.520
550
180.300
M20 X 2.5
390
111.870
550
257.770
650
186.450
M20 X 1.5 (*)
440
130.620
630
187.020
750
222.650
M22 X 2.5
540
141.950
750
197.150
900
236.580
M22 X 1.5 (*)
600
162.750
850
230.560
1.000
271.240
M24 X 3
670
160.238
950
227.203
1.130
270.252
M24 X 2 (*)
750
184.566
1.050
258.392
1.250
307.610
COPY - Moto GB - Grant Martland - [email protected]
Содержание TRK 502
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