EXTENSIBLE DOUBLE BEAM VIBRATING SCREEDS
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CHARACTERISTICS
The vibrating screeds are used for the vibrating and the finishing of the floors in the construction industry
and for the finishing of parts in the pre-cas industry. The double beam screed depth-effect is from 15 to 25
cm. For very thick concrete layers, we recommend to use pokers at the same time in order to obtain the
right compaction and consistence of the concrete mass as well as its finishing.
The vibrations come from the vibrating group that consists on an exciter powered by a petrol engine or an
electric motor.
Double beam screed consists on a set of aluminium or steel beams (sold separately) able to extend from
2,7 or 3,5 meters to 4,5 or 6 meters length. To increase the length it is necessary to free the vibrating group
clamps and to pull the beams to get the required length. Then, fix the vibrating group clamps again.
The vibrating group fit in the beams and is fixed to them with two clamps (one on each side).
It is possible to choose a vibrating group powered by an electric vibrator or a petrol engine. In the case of
the petrol engine, vibration is produced by an eccentric weight, assembled with bearings, inside a steel
housing. This housing also works as an oil tank for lubricating the bearings. A belt transmits the movement
from the engine (assembled on four silent-blocks to isolate it from vibrations) to the pulley of the eccentric
weight to produce the vibration.
There is a hook on each edge of the beam where the pulling handle must be inserted for pulling the screed
while working.
***S/L=no time limitation, taking as a reference a working period of 8 hours a day.
ELECTRIC SCREED
PETROL SCREED
Model
►
▼ characteristics
QP
QPM
QGH
QGR
Motor
EXTERNAL
VIBRATOR
BM300
EXTERNAL
VIBRATOR
BM300/M
HONDA GX160
UT1 QX4
ROBIN EX17
Frequency (rpm)
3000
3000
7000
7000
Beam length (m)
2,5-4,5 / 3,5-6
2,5-4,5 / 3,5-6
2,5-4,5 / 3,5-6
2,5-4,5 / 3,5-6
Vibrating group weight (kg)
29,8
30
47,2
47,5
Centrifugal force (kp)
310
310
300
300
Acoustic pressure Lpa (dB)*
<70
<70
115
115
Acoustic power Lpa (dB)*
-
-
122
122
Hand-arm vibration (m/s
2
)**
9,4
9,4
1,97
1,97
Uncertainly K (m/s
2
)
1,35
1,35
1
1
Time from which precautions
must be taken
(hours)
0,56
0,56
S/L***
S/L***
Time limit of continued use
(hours)
2,26
2,26
S/L***
S/L***
*Noise values measured at the
workstation: 1,6m over the floor
and 0,2m by the ear of the user.
**Vibration measured in the handle
of the vibrating unit (as shown in
the picture).
8-800-555-58-36
www.VibroMotors.ru
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