Low noise

By removing crown and crown head which were the noise source of conventional hammer grab, excavation work with low noise is achieved.

Low vibration

With conventional hammer grabs, we have needed to drop a hammer from a height of a certain degree to do excavation works.
When it is fallen by its own weight, vibration occurred. But, our newly developed hammer grab does not require height for falling to do excavation work.

The biggest advantage of clamshell grab is its low vibration and noise at the time of excavation work compared to those caused by conventional hammer grabs.

If you need to change the machine's weight for underwater drilling or as required, you can easily change the weight. Also, as for both aspects of its price and maintenance, compared to conventional hammer grabs, it needs lower cost and its number of parts is fewer. So its running cost is less than the conventional ones.

※Since it does not use any hydraulic oil and the like, you do not need to worry about underground water contamination.