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CLUTCH
The gear clutch is mounted on the tool-bearing spindle in the front part of the
screwdriver. It has the function of transmitting to the bit, and therefore to the screw,
only part of the torque that may be produced by the screwdriver so as to ensure
optimal screw-tightening conditions. It also makes it possible to maintain a highly
constant level of torque when tightening screws in sequence. When the resistance
offered by the screw has reached the maximum level allowed by the clutch setting,
the teeth skip to prevent the torque transmitted from exceeding the preset level. The
range of clutch settings is determined by the spring (1) that locks the toothed disks
(2). When choosing a spring, it is always advisable to make sure that the levels of torque you wish to obtain are situated
towards the middle of its range of settings. With the same screwdriver and the same spring, the effective torque applied
to the screw strongly depends on the degree of rigidity of the joint. Other conditions being equal, pliable or elastic joints
may determine a considerable reduction in torque. All the values shown in the diagrams and tables refer to rigid joints.
Each screwdriver is supplied with the clutch specified in table 1.
Table 2
RANGE OF CLUTCH SETTINGS
Clutch group Spring code Spring colour
7311156.1
5080111
7311156.2
5080110
7311156
5080112
7311158
5080114
7311158.1
5080116
7311158.2
5080118
MATERIALS
OBER pneumatic tools consist of parts in steel, aluminium, cast iron, rubber and plastic and do not contain substances
which damage the environment or are harmful to people. However, the individual materials must be disposed of
separately, following the National indications for recycling and handling waste.
8
Torque
green
white
yellow
plain
red
black
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 Nm
1
2
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