
Manufacturing of Earth Rockets (Soil Displacement Rockets) and accessories for trenchless pipe and cable laying

DBF Metallverarbeitung GmbH
32602 VlothoNew on Amplifa
GEO Earth Rocket – powered by DBF Metallverarbeitung GmbH
DBF Metallverarbeitung GmbH manufactures cylindrical pneumatic hammers (soil displacement rockets) under the GEO Earth Rocket brand for the trenchless installation and refurbishment of pipes, cables, and utility lines. All products are manufactured in our own facility in Vlotho according to the motto 'fast, forceful, powerful' and are tailored for various soil types. The portfolio includes the 'Rigid', the 'Movable', and the 'Light' variants in diameters from 48 to 130 mm, as well as the GEO DRILL drilling system, the GEO COREMIX mixing pump, and the GEO Oler. Each Earth Rocket is manually inspected after manufacturing and is only delivered after approval by quality assurance. The casings are hardened and finished, and PTFE seals ensure low air consumption. The manufacturer's location is Salzuflener Straße 93, 32602 Vlotho, Germany.
- Site
- Vlotho
- Processes
- Manufacturing of Earth Rockets (cylindrical pneumatic hammers) in-house, manual assembly, and, Metal processing (DBF Metallverarbeitung GmbH's core business), Trenchless installation and refurbishment of pipes, cables, and utility lines in, Soil displacement with Earth Rockets (displacement principle, pulling of utility and disposal lines, Horizontal directional drilling / HDD pilot drilling and widening drilling with GEO DRILL drilling, Manual Inspection/Quality Assurance of Every Rocket After Completion, Consulting on Trenchless Pipe/Cable Installation
- Materials
- PTFE, Steel (hardened, finished casing), Oil (hydraulic/lubrication oil for Oler), PTFE Seals
- Industries
- Trenchless Installation and Refurbishment of Pipes, Cables, and Utility Lines, Pipe Laying/Soil Displacement Processes
- 01
Design and Development
- 02
Metal Processing / Machining
- 03
Hardening and Finishing of Casings
- 04
Manual Assembly
- 05
Manual Inspection and Quality Assurance
- 06
Shipping
Materials and Processes
Steel (hardened, finished casing)
Hardening and finishing of the casings ensure a long service life for the Earth Rockets.
PTFE Seals
High-quality PTFE seals ensure low air consumption for the pneumatic rockets.
Our Location

Vlotho
DEFactory and Corporate Headquarters – Manufacturing of Earth Rockets
- Materials
- Steel, PTFE
- Earth Rocket Product Line (21 Variants)
- GEO DRILL Drilling System
- GEO COREMIX Mixing Pump
- GEO Oler
Products






Inside the production



Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacturing of Earth Rockets (cylindrical pneumatic hammers) in-house, manual assembly, andAssembly | – | – | – | – | Steel (hardened, finished casing - derivable), PTFE Seals |
| Metal processing (DBF Metallverarbeitung GmbH's core business)Machining | – | – | – | – | – |
| Trenchless installation and refurbishment of pipes, cables, and utility lines inEngineering | – | – | – | – | Pipes, Cables |
| Soil displacement with Earth Rockets (displacement principle, pulling of utility and disposal linesEngineering | – | Earth tunnel length not specified × Rocket diameter φ 48-130 mm | 10 kg (rocket weight) – 112 kg (rocket weight) | – | – |
| Horizontal directional drilling / HDD pilot drilling and widening drilling with GEO DRILL drillingEngineering | – | 50 m / 100 m drilling length × 250 mm widening diameter | – | – | – |
7 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Earth Rocket - Pneumatic Hammer (Soil Displacement Rocket) | GEO Earth Rocket / DBF Metallverarbeitung GmbH 'The Rigid' from Geo - Ø 48 Long/Short up to Ø 130 | 11 Variant | Diameter Ø 48-130 mm, Length 840-1400 mm, Air consumption 0.40-2.80 m3/min, Blow count 370-450/min | – | Vlotho |
| Earth Rocket - Pneumatic Hammer (Soil Displacement Rocket) | GEO Earth Rocket / DBF Metallverarbeitung GmbH 'The Movable' from Geo - φ 48 Short up to φ 130 | 10 Variant | Diameter φ 48-130 mm, Length 1000-1640 mm, Air consumption 0.40-2.80 m3/min, Blow count 370-450/min | – | Vlotho |
| Earth Rocket (smooth head form for sandy soil) | GEO Earth Rocket / DBF Metallverarbeitung GmbH 'The Light' from Geo | – | – | – | Vlotho |
| Drilling System (Horizontal Slurry Drilling System) | GEO Earth Rocket / DBF Metallverarbeitung GmbH GEO DRILL | 1 | Drilling force 3800 kg, Pulling force 4900 kg, Torque 1800 Nm, Spindle 0-110 rpm, Drill rod 930 | – | Vlotho |
| High-Pressure Pump | Honda GX 270T2 (Engine) | 1 | max. 3600 rpm, max. power 6.3 kW, displacement 270 cm3, weight 46 kg | – | Vlotho |
| Mixing Pump | GEO Earth Rocket / DBF Metallverarbeitung GmbH GEO COREMIX (Honda GX 160K1) | 1 | 3600 rpm, max. power 3.6 kW, displacement 163 cm3, weight 31 kg; Mixing unit 1: 250 kg, Tank 500 | – | Vlotho |
| Oler (Oil dosing unit for Earth Rockets) | GEO Earth Rocket / DBF Metallverarbeitung GmbH GEO Oler 1.3 Liters | 1 | Oil dosage 0.15-2.45 g/cbm, Air flow 25-140 L/sec., Weight 46 kg, for 48/55 Earth Rockets | – | Vlotho |
Additional services