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GENERAL INFORMATION
The UM series handheld vibrators are ideal for short
pours, walls, footings, and provide exceptional power in a
lightweight, user friendly package.
Multiquip offers a selection of complete motor/head/shaft
combinations to meet all your requirements. Choose from
0.9 (23 mm) to 1.5 inch (38 mm) steel vibrator heads and
shaft options of 3.2 feet (1 meter). 4.9 feet (1.5 meters) or
8.2 feet (2.5 meters) long.
Vibration-dampening handle grip reduces operator fatigue.
Original cord protector gives flexibility to input cord for
longer cord life.
A vibrating steel head is attached to one end of the flexshaft.
This head generates vibration via an eccentric rotator that
consolidates the concrete by removing air pockets. The
round head design allows for the transmission of vibration
in all directions.
Tips
„ Keep the bending radius of the flexible hose to a
minimum during use.
„ Avoid starting the unit with the vibrator head immersed
in the concrete mix. Turn on the power before immersing
the vibrator head into concrete mix.
„ Excessive wear to the vibrating head can result from
misuse. DO NOT allow the head to vibrate against already
hardened concrete or steel used for reinforcement.
„ NEVER drop or knock the vibrator head against any
hard objects. This can damage the eccentric end bell
assembly or bearings contained within the head.
„ ALWAYS rinse or wipe off any wet concrete before it
dries or hardens on any part of the unit.
UM HANDHELD VIBRATOR • OPERATION MANUAL — REV. #0 (06/29/20) — PAGE 11
GENERAL INFORMATION
WARNING
Before operating this vibrator, the
operator must read and understand
the contents of the operation manual.
Failure to read this manual may result
in severe bodily harm and damage to
the equipment.
Vibrator Theory
The purpose of this vibrator is to consolidate concrete by
removing air pockets and voids.
The vibrator is designed to set the particles in fresh concrete
in motion, thereby reducing friction and giving the mixture
a mobile quality so that gravity and the displacement of
entrapped air cause the concrete to settle easily into place.
By consolidating the concrete quickly, the vibrator allows
stiffer mixes to be poured than would otherwise be possible.
Vibration also makes concrete more watertight, increases
resistance to weathering, and creates a better bond
between concrete and reinforcement.
Because vibration causes much of the entrapped air in
concrete to rise to the surface, honeycombing is prevented.
Vibration also eliminates most air pockets between the
concrete and vertical forms.
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