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TECHNICAL FEATURES
Table 1
Model
Code
ERVIT11
8302061
ERVIT22
8302062
8302063
ERVIT33
ERVIT44
8302064
ERGOVIT22
8302072
8302074
ERGOVIT25
ERGOVIT33
8302073
ERGOVIT55
8302075
8302077
ERGOVIT77
SUPERGOVIT2 8302066
SUPERGOVIT3 8302067
SUPERGOVIT5 8302068
Air inlet 1/4 GAS - Ø inside tube min. ERVIT 6 mm; ERGOVIT 8 mm SUPERGOVIT 10 mm - 1/4" hexagonal connection
(6.35 mm)
Noise emission levels determined by using ISO/CD15744
Levels of vibrations at the handle determined by using ISO8662
Note: make sure that the performance features required correspond to those described above, otherwise it will be
necessary to choose a different model from the broad range offered by OBER.
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). Different springs are available, each one covering a range of torque values
as indicated in table 2. Note that the ranges of torque settings are overlapping, i.e. certain
torque values may be obtained with different springs. 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. If you should wish to obtain a level of torque
outside its range of settings, you may request other clutches or springs as indicated in table in 2.
Table 2
RANGE OF CLUTCH SETTINGS
Clutch group Spring code Spring colour
7311146
5080111
7311141
5080110
7311142
5080112
7311143
5080114
7311144
5080116
7311145
5080118
6
Speed
Power
Torque Consumption Weight
(rpm)
(watt)
2000
130
800
130
450
130
250
130
1800
220
1000
220
670
220
380
220
210
220
1700
440
670
440
380
440
green
white
yellow
plain
red
black
1
2
(Nm)
(Nl/min.)
1,4
420
3,6
420
6,5
420
11.5
420
3,5
680
6,3
680
8,8
680
15,7
680
28
680
8
750
20
750
36
750
3
4
5
6
7
8
Noise
Vibrations
Lp
(Kg)
(dB(A))
(m/s
0.88
76.5
1,05
76.5
1,05
76.5
1,05
76.5
0.95
74.7
1.1
74.7
1.1
74.7
1.1
74.7
1.1
74.7
1.19
80.3
1.37
80.3
1.37
80.3
Torque
9 10 11 12 13 14 15 16 17 18 Nm
GB
Clutch gr.
a
h
2
)
<1
7311141
<1
7311142
<1
7311142
<1
7311143
<1
7311142
<1
7311143
<1
7311143
<1
7311143
<1
7311144
<1
7311143
<1
7311144
<1
7311144
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