Efficient pneumatic operation
Internal airflow is designed for dependable starting and reversing with controlled air consumption and recoil.
TERRA Piercing Tools – Long Version
Proven trenchless installation across the 55–210 mm range.
Long-version TERRA-HAMMER pneumatic piercing tools for underground pipe and cable installation. Engineered around a robust main piston, efficient airflow and the KOK combi-head for effective soil displacement.
55–210 mm
Selected long-version diameters
6–7 bar
Published operating pressure
KOK
Combi-head cutting geometry
S / F
Alternative reversing systems
Trenchless installation
Install underground services with less surface disruption.
TERRA-HAMMER piercing tools use pneumatically driven impact energy to advance through suitable ground, displacing soil to form an underground bore.
The method allows contractors to install suitable pipes and ducts beneath roads, paths and other obstacles without excavating a continuous trench.
Tool selection depends on the ground conditions, crossing length, service diameter, launch space and compressed-air supply.
Typical applications
- Water and gas service crossings
- Power and telecommunications ducts
- Installation beneath footpaths, driveways and roads
- Short underground utility crossings where ground conditions are suitable
TERRA-HAMMER engineering
Designed for penetration, control and practical servicing.
TERRA’s long-version piercing tools combine specialised head geometry with a robust impact mechanism and straightforward construction.
KOK combi-head
Cutting geometry designed for challenging ground.
The KOK combi-head incorporates longitudinal grooves that help displace soil sideways during the piercing process.
Its cutting edges and central chisel are designed to break through suitable obstructions, helping the tool maintain forward progress.
The result is a head design intended to support accurate underground boring in appropriate ground conditions.
Internal construction
A robust tool built around impact energy.
TERRA’s heavy main-piston design is intended to deliver effective impact energy through the tool body.
The internal airflow arrangement supports starting, forward movement and reversing while helping minimise unnecessary air consumption and recoil.
The simplified construction is also designed to make inspection and maintenance more practical.
Practical servicing
Simplified internal construction helps make servicing, inspection and replacement-part planning more straightforward.
Main-piston warranty
TERRA’s published material references a three-year warranty on main pistons. Confirm applicable terms and model coverage before supply.
Directional control
Two reversing systems for different configurations.
Depending on the selected TERRA-HAMMER model, reversing can be controlled by turning the air hose or using a dedicated remote-control arrangement.
VERSION S
Quick reverse
The Version S reversing system uses a quarter-turn of the air hose to initiate reverse movement.
TERRA describes the arrangement as incorporating pneumatic locking to help prevent unintended reversing during normal operation.
VERSION F
Remote-control reverse
Version F uses a remote-control reversing system so the operator can initiate the reverse function using the designated controls.
Availability depends on the specific TERRA-HAMMER model and configuration.
Technical reference
Long-version model specifications.
Representative TERRA-HAMMER configurations from the supplied manufacturer specification table.
Different versions of the same diameter may vary in length, weight, reversing system and air requirement.
| Model | Diameter | Length | Weight | Frequency | Air use | Pressure |
|---|---|---|---|---|---|---|
| TU 055 R (ortbar) | 55 mm | 1.25 m | 16 kg | 520/min | 0.9 m³/min | 6–7 bar |
| TU 068 SK | 68 mm | 1.31 m | 28 kg | 420/min | 1.3 m³/min | 6–7 bar |
| TU 080 SK | 80 mm | 1.41 m | 39 kg | 395/min | 1.8 m³/min | 6–7 bar |
| TU 090 SK | 90 mm | 1.49 m | 51 kg | 395/min | 1.8 m³/min | 6–7 bar |
| T 105 S/F | 105 mm | 1.40 m | 60 kg | 360/min | 2.4 m³/min | 6–7 bar |
| T 135 Twin | 135 mm | 1.70 m | 120 kg | 350/min | 2.4 m³/min | 6–7 bar |
| T 155 F | 155 mm | 1.84 m | 170 kg | 285/min | 3.8 m³/min | 6–7 bar |
| T 190 F | 190 mm | 1.89 m | 258 kg | 275/min | 5.0 m³/min | 6–7 bar |
| T 210 F | 210 mm | 1.90 m | 317 kg | 275/min | 5.0 m³/min | 6–7 bar |
Specification guidance:
Figures are selected examples from
the supplied TERRA technical table
rather than a complete model listing.
Mini, traceable and other variants
may have different dimensions
or operating requirements.
Technical specifications may change.
Confirm the exact model with
TA Drilling before ordering.
Understanding the range
What do the model letters mean?
TERRA uses letter combinations to identify different head arrangements, reversing functions and construction configurations.
T
Fixed earth-displacement head.
TU
Interchangeable head adapters.
S
Quick reverse using a quarter-turn of the air hose.
F
Remote-control reversing.
K
Serviceable construction without heating.
SK
Combination of Versions S and K.
S/F
Available in Version S and Version F.
KOK-LD
Traceable KOK-LD head adapter for compatible configurations.
Installation applications
Versatile tools for utility crossings and service installation.
TERRA offers pneumatic piercing tools and compatible accessories for different underground installation requirements.
Underground service crossings
Install suitable pipes and ducts beneath roads, paths and driveways with less continuous surface excavation.
Bore expansion
Compatible expanders can increase the bore diameter for selected applications. Available sizes depend on the chosen model.
Traceable configurations
Compatible traceable-head arrangements can assist locating the tool during installation when paired with the correct locating equipment.
Selecting the right equipment
Match the tool to the ground, service and available access.
Choosing a pneumatic piercing tool involves more than simply selecting the diameter. TA Drilling can help assess the working conditions and identify a suitable configuration.
✓
Pipe or duct outside diameter
✓
Ground conditions and obstructions
✓
Crossing length and alignment
✓
Launch and reception pit dimensions
✓
Compressor airflow and pressure
✓
Traceability and reversing requirements
Need help choosing a model?
Send us the planned installation diameter, crossing distance, ground conditions and available working space.
We can help identify which TERRA-HAMMER configuration, head arrangement and accessories are appropriate for the job.
Speak to TA Drilling
TERRA support in the UK
Which long-version piercing tool fits your next bore?
From tool diameter and air supply to ground conditions and head compatibility, TA Drilling can help you select the appropriate equipment for your installation.
Enquire with TA Drilling