Grundomat 55P (2 in.) (New)

The GRUNDOMAT 55 P is a 2 in. pneumatic piercing tool built for trenchless installation of small pipes, cables, conduit, and utility lines. Powered by compressed air, this cylindrical air-hammer drives through the ground to create a clean underground bore without open-cut trenching.

What contractors use it for: boring under a driveway, sidewalk, or landscaped yard to install irrigation and sprinkler lines, electrical conduit, cable and fiber optic drops, and small water service lines — no trench, no cut concrete, no landscaping repair. At 32 lbs and 18 CFM, it runs off a small compressor and launches by hand.

Also known as: underground mole, boring missile, air mole, ground piercing tool, horizontal boring tool, trenchless bore tool, pneumatic gopher. Whatever your crew calls it — this is the 2 in. class tool.

As a pneumatic mole, the GRUNDOMAT 55 P performs well in displaceable soils such as sand, loam, and gravel, including soil conditions with fracturable rocks. It is not designed for solid rock or unfracturable rocks, and very soft soils may affect accuracy because the tool’s own weight can cause deviation.

Grundomat 55P Specifications

Package Options

• Tool only (P/N GP0550031) — the boring tool itself, for crews that already have an air hose and lubricator.
• Basic package (P/N 07076920) — tool, 50 ft. air supply hose, in-line lubricator assembly, 1 gallon Grundo-Oil tool lubricant, magnetic starting level, operator’s & parts manual.
• Deluxe package (P/N 07060420) — everything in the Basic package plus a maintenance tool box matched to the 55P: spanner wrench pair, replacement spanner pins, liquid Teflon, seal compression clamp, roll pin punch, 277 threadlocker (10 ml), primer (2 oz), and roll pin kit.

Part Number Cross-Reference

GP0550031 — GRUNDOMAT 55P, tool only · 07076920 — GRUNDOMAT 55P, basic package · 07060420 — GRUNDOMAT 55P, deluxe package. Smaller bore? See GRUNDOMAT 45P: GP0450032 / 07076917 / 07060417. Larger bore? See GRUNDOMAT 65P: GP0650030 / 07076926 / 07060426.

Ships from our US warehouse — backed by warranty.

The GRUNDOMAT 55 P is a practical choice for landscapers, electricians, and utility contractors who need reliable underground piercing performance with minimal equipment and setup.