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GRUNDOMAT OVERVIEW

The GRUNDOMAT tool is easy and efficient to use. Minimal crews can
quickly and economically perform accurate bores (from 50 to 150 feet in
length). For dead-end bores, reverse the tool by simply twisting
the air hose just one quarter turn. Attach a sonde for precise
locates of the tool while boring. Attach a pipe pulling kit to
make easy work of installing service lines.
This tool is easily launched by hand or
from a cradle. Minimal tool setup is required for fast profitable
work. Durable constructions means little maintenance.
Here is how it works:
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 casing
ahead.
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.
PRODUCT SPECIFICATIONS

| Tool Dia |
Length |
Weight |
Air Cons |
Strokes |
| (In) |
(In) |
(Lbs) |
cfm |
/Minute |
| 1 /34 |
35 |
18 |
16 |
550 |
| 2 |
44 |
30 |
21 |
550 |
| 2 1/2 |
51 |
55 |
25 |
450 |
| 3 |
58 |
75 |
35 |
400 |
| 3 1/3 |
59 |
101 |
39 |
390 |
| 3 3/4 |
67 |
148 |
42 |
330 |
| 4 |
67 |
154 |
42 |
330 |
| 4 1/4 |
67 |
196 |
56 |
310 |
| 5 |
68 |
280 |
95 |
350 |
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