The presence of a spiral convex groove in the surface of the vibration unit of the concrete vibrator increases the contact area of freshly mixed concrete with the vibrating unit. This, together with physical engagement, increases contact force with freshly mixed concrete, thereby transmitting vibration energy.

The use of the surface shape of the spiral concave groove, in combination with the functions of clockwise and counterclockwise revolution, controls the direction of vibrating force, thereby displaying secondary effect.

The switchover of the direction of motor revolution with the switch at hand is effective when revolved clockwise in breaking and leveling bumps of freshly mixed concrete when applied.

When pulled up, it is expected to effectively facilitate the upward discharge of air bubbles.

revolved counterclockwise, the unit is expected to produce a downward thrust force, pressing the freshly mixed concrete to the farthest corners of the rebars, propagating the vibration to faraway locations.

To check which way the product is vibrating, workers can do so directly with his hands by holding the vibrating body gently with his right hand as shown in the figure.

If his forefinger moves rightward, the motor rotor should be revolving clockwise. If leftward, counterclockwise.

In inspecting with the floor surface, workers can apply the vibrating tip to the floor. The vibrating body will then move to the left or right.

If it moves to the right, the motor rotor should be revolving clockwise. If left, counterclockwise.

The switch at hand comes equipped with functions of clockwise and counterclockwise revolution. If, during concreting, the vibrating unit is caught by a rebar, the unit becomes more likely to collect the material by using the force of the vibrating unit trying to float, hopefully resulting in preventing the material from being left in place.
Note: If the vibrating unit is caught by several rebars, it can physically not be pulled out.

Round head tip: The tip is so shaped as to reduce dispersions of freshly mixed concrete when pulled or inserted into a mass of concrete. The tip is also so shaped as to allow the void formerly occupied by the vibrator to be neatly filled up after the vibrator goes out.
Rubber head tip: The use of a rubber head prevents noise from being generated in concreting by the vibrator tip touching a mold or rebar during concreting, and prevents damage and other inconveniences from being generated by a mold, rebar, or tile from touching the tip.

The HBM series are eco-friendly. Cables are particularly eco-friendly, using environmentally friendly material. Cables used in HBM have successfully been reduced in weight by 10%.(From our earlier models.)
*Environmentally friendly materials do not include chlorine or other halogen-based element that may generate harmful substances when incinerated or buried in landfill or a lead component that threatens to harm the human body. Materials used are easy to recycle.

With its rotor integrated with its vibration shaft, the machine is now easy to maintain. Moreover, the bearings are lubricated not with oil but with grease, which obviates the need for controlling lube or oil seal.

Burns in the motor due to the imperfect contact of the plug are reduced by using a super-tough pin in the developed EP plug. The super-tough pin is semi-permanently elastic, not causing imperfect contact in the plug.

The vibration balance of the HBM is adjusted to minimize vibration at hand. Moreover, the new hose absorbs some of the vibration, thereby reducing vibration at hand.