Yamamoto Ultra Large Hydraulic Rock Splitter

Using explosives or large rock breakers are the normal methods for the excavation of hard rock. But restrictions on blasting are getting stricter and the use of rock breakers is not always feasible due to vibrations, noise restrictions or simply the rock being too hard to break. Yamamoto ultra-large rock splitters offer an alternative method for efficient excavation of large volumes of hard rock without the need for explosives, vibrations or fly rock.

The splitter can be mounted from a crane or a normal excavator for open pits or shafts, or mounted on a specialized carrier for horizontal tunneling. For large volumes of rock, there is simply no mechanical method more efficient, safe and silent than the Yamamoto rock splitter.

The working principle is based on two counter wedges being inserted into a pre-drilled hole. A hydraulic cylinder pushes out the center wedge between the counter wedges to spread them apart and the rock splits.

The key advantages include:


Rock splitting is done without any explosives, pollution or noise. Therefore it is possible to work in an environment where there are restrictions for such issues. Also it offers a safe working environment.


Offers highest possible productivity due to large wedge diameter and very high splitting force.


Designed with minimal parts and provides precise finishing, ensuring product reliability and durability.


Direction of splitting and the size of the split can be determined in advanced. Offering more accuracy than explosives.


Due to the lack of fly rock or any other dangers, the splitting process can be done continuously without any evacuations or unnecessary pauses.


Very simple and easy to use; minimise the need for highly experience operators.


Can be attached to almost any kind of hydraulic excavator from 12 ton weight class and up.

We offer two models of rock splitter, HRB-1000 and HRB-1700.

For vertical applications (shaft-sinking, open pit excavation), the rock splitter is mounted on a wire from a conventional excavator of 12-ton class or larger.


For horizontal applications (tunneling), the splitter is mounted on a specialized carrier with telescopic boom and rotator.