Design and manufacture of electrically powered bucket ladder dredgers and floating grab dredgers for sand and gravel extraction
Rohr Bagger GmbH
PlankstadtNew on Amplifa
About Rohr Bagger
Rohr Bagger GmbH, based in Plankstadt, has specialized for over 40 years in the design and production of extraction equipment for wet mining of sand and gravel. The product portfolio comprises electrically powered land-based and floating bucket ladder dredgers as well as floating grab dredgers in jib, gantry-frame and catamaran configurations, including systems for automatic, unmanned barge loading via sensor technology. The plants extract from dredging depths of 10 to over 100 meters and can be equipped with dewatering screen machines, crushers, fine sand recovery and floating conveyor systems; hydraulic motor grabs and buckets come from in-house production. Manufacturing is in steel construction as special machinery in single units and small series, complemented by 3D design, strength calculations and FEM. In addition to new builds, the company offers services such as inspection (dredger check), maintenance, modernization, spare parts and on-site conversions. More than 40 employees work at the Plankstadt site; customers are located in Europe, especially Germany, as well as worldwide.
- Site
- Plankstadt
- Processes
- Manufacture of electrically powered bucket ladder dredgers (land-based and floating), Manufacture of floating grab dredgers (jib, gantry-frame and catamaran configurations), Design of extraction equipment (3D design, manufacturing documentation, strength calculations,, Manufacture of grabs and buckets as accessories (hydraulic motor grabs, rope grabs), Dredger check – machine inspection, maintenance, servicing and modernization of, Assembly of extraction equipment, Design of extraction equipment, Maintenance and modernization (dredger check)
- Materials
- Steel (structural steel)
- Employees
- >40
- Industries
- Wet mining / sand and gravel extraction, Hydraulic engineering, Mining and dredging industry
- 01
3D design and strength engineering (Inventor, FEM)
- 02
Steel fabrication of assemblies
- 03
Drive technology and electrical engineering
- 04
Assembly of extraction equipment
- 05
Inspection, maintenance and modernization
- 06
Spare parts distribution and service
Materials and Processes
Steel (structural steel)
Main material for steel construction, hoisting gear, grabs and buckets of the extraction equipment
Location
Plankstadt
DEHeadquarters, design and production
- Lot size
- Single-unit systems / special machinery construction
- Materials
- Steel
- Land bucket ladder dredgers
- Floating bucket ladder dredgers
- Floating grab jib dredger (Af 4,2/140 to Af 6,0/220)
- Floating grab gantry-frame dredger (RS 4,0/140 Bf to RS 15/550 Bf)
- Floating grab catamaran dredger (RS 5,0/180 Pf to RS 15/550 Pf)
- Catamaran dredger for automatic ship loading
Equipment
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of electrically powered bucket ladder dredgers (land-based and floating)Engineering | – | – | – | – | Steel (structural steel, not further specified) |
| Manufacture of floating grab dredgers (jib, gantry-frame and catamaran configurations)Engineering | – | – | – | – | Steel (structural steel, not further specified) |
| Design of extraction equipment (3D design, manufacturing documentation, strength calculations,Engineering | – | – | – | – | – |
| Manufacture of grabs and buckets as accessories (hydraulic motor grabs, rope grabs)Assembly | – | – | – | – | Steel (structural steel, not further specified) |
| Dredger check – machine inspection, maintenance, servicing and modernization ofTesting | – | – | – | – | – |
| Assembly of extraction equipmentAssembly | – | – | – | – | – |
6 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Floating grab dredger – jib configuration | Rohr Bagger GmbH Af 4,2/140; Af 5,0/180; Af 6,0/220 | – | Grab capacity 4,2–6,0 m³; payload 14–22 MP; hoisting power 220–400 kW; dredging depth 10–60 m; | – | Plankstadt |
| Floating grab dredger – gantry-frame configuration | Rohr Bagger GmbH RS 4,0/140 to RS 15/550 | – | Grab capacity 4,2–15 m³; payload 14–55 MP; hoisting power 150–800 kW; dredging depth hydraulic grab | – | Plankstadt |
| Floating grab dredger – catamaran configuration | Rohr Bagger GmbH RS 5,0/180 Pf to RS 15/550 Pf | – | Grab capacity 5–15 m³; payload 18–55 t; hoisting power 220–800 kW; dredging depth hydraulic grab | – | Plankstadt |
| Floating grab dredger – catamaran for automatic ship loading | Rohr Bagger GmbH RS 5,0/180 Pf to RS 15/550 Pf | – | Grab capacity 5–15 m³; payload 18–55 t; hoisting power 220–800 kW; dredging depth hydraulic grab | – | Plankstadt |
| Land bucket ladder dredger | Rohr Bagger GmbH | – | – | – | Plankstadt |
| Floating bucket ladder dredger | Rohr Bagger GmbH | – | – | – | Plankstadt |
Additional services
Company History
- 2022
As of 01 November 2022, business operations were taken over by an investor consortium as part of a restructuring: Hermann Peter Group (Breisach), Dreher Group (Bensheim) and Krieger Group (Neckarsteinach). The aim of the realignment is to expand the service business and