Maintenance
137
Stainless steel
tightening torques ft.lb
Guidelines for torques (in Nm) for self-locking nuts, hexagon bolts and
nuts.
.
*
The friction coefficient of 0.10 applies to oiled sheets, cast iron, hard-
ened surfaces, greased threads, etc. The higher value of 0.30 applies
to dry sheets.
Exceptions to this table are listed in the parts and/or instruction man-
ual.
Checking bolts and nuts
Check all bolt and nut connections:
Turn all nut and bolt connections up to the point as given in the
chart below:
•
after the first operating hour,
•
regularly (at least weekly).
Torques
Quality
70 (A2)
80 (A4)
Friction
*
0.10
0.20
0.30
0.10
0.20
0.30
Thread
M5
2.6
4.1
5.1
3.5
5.5
6.8
M6
4.6
7.2
8.8
6.1
9.6
11.8
M8
11.0
17.5
21.7
14.7
23.3
28.5
M10
21.7
34.6
43.0
28.3
45.6
57.2
M12
37.0
59.4
73.9
49.3
79.0
98.5
M14
59.4
94.9
118.1
79.0
126.8
157.2
M16
91.3
147.8
184.8
121.7
197.1
246.3
M18
127.5
204.3
255.0
170.3
272.4
339.8
M20
179.0
290.5
363.0
239.1
386.5
484.7
M22
244.2
399.2
501.4
326.0
532.5
668.8
M24
308.7
499.9
625.3
411.5
666.6
834.0
\
WARNING
Nuts and bolts could become loose through vibrations. Check the
nuts and bolts regularly to prevent damage to the machine and
possible injury, especially after maintenance.
Summary of Contents for Exacta-TL-GEOSPREAD GS3
Page 6: ...Preface 6 ...
Page 166: ...Notes 166 Notes ...