Maintenance | 7
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7.3.3.2
Checking Clamping Cylinder End Position
1.
Measure the end positions of the clamping cylinder with the installed
power chuck.
2.
Compare the measured dimensions with the recorded dimensions (As-
sembly on Machine Spindle) without installed power chuck.
Ø
In each end position, the clamping cylinder must have at least 1 mm
stroke reserve.
7.3.3.3
Checking the Clamping Force
Check clamping force with clamping force measurement system.
Recommended clamping force measurement
system
ID no.:
F-Senso chuck (only for external clamping force
measurement)
179800
Suitable jaws may have to be used. In the case of internal clamping,
only the external clamping force can be measured.
7.3.4
Checking the Tightness of Screw Connections
If screws are replaced or undone, incorrect replacement or incorrect attach-
ment may lead to dangers for persons and objects. For this reason, for all
holding screws, the screw recommended by the manufacturer of the screw
must be used and the tightening torque applied in accordance with the screw
quality.
For
cylinder head screws
of the conventional sizes M4 – M24 and strength
classes 8.8, 10.9 and 12.9, the following tightening torque table applies:
Tightening torque in Nm
Strength
class
M4 M5 M6
M8
M10 M12 M14 M16 M18 M20 M22 M24
8.8
3.0 5.9 10.1 24.6 48
84
133 206 295 415 567 714
10.9
4.6 8.6 14.9 36.1 71
123 195 302 421 592 807 1,017
12.9
5.1 10 17.4 42.2 83
144 229 354 492 692 945 1,190
The table values do
not
apply to tightening torques expressly specified
elsewhere!
