Grundomat pneumatic piercing tools have been providing accurate horizontal bores beneath roads, railways, and landscaping across North America and around the world for nearly 45 years. Water, gas, sewer and electrical industries have all benefited from this work horse of trenchless technology. Minimal operating space is required and the horizontal boring tool serves as a complement, and in many situations an economical alternative to, larger, more expensive directional drilling equipment.
The reciprocating stepped-cone chisel head action of the GrundomaT tool is unique because it hammers away at solid obstacles. This two-stroke action means that the piston’s impact is concentrated on the reciprocating tool head for optimum boring performance.
Compressed air repeatedly propels the piston against the rear of the chisel head assembly. This first compresses the pre-tensioned steel spring which forces the chisel head assembly forward independently of the main casing to provide a pilot bore. Then, the same continuous force thrusts the main
• Chisel-tip performs pilot bore
• Stepped-conedesignandlongtoollength hold trajectory
The tool follows the pilot bore to the targeted exit, even through rocky soils and cobble. GrundomaT’s stepped head design fractures and displaces rock, resulting in the directional stability of the tool. This provides for consistently on-target bores, from short to long-distance shots.