Development and manufacture of compressed-air brake systems for towing vehicles and trailers in the off-highway sector
Dipl.-Ing. Tietjen GmbH
Bücken, Lower SaxonyNew on Amplifa
About us
Dipl.-Ing. Tietjen GmbH in Bücken develops and manufactures compressed-air brake systems for the original equipment and retrofitting of towing vehicles and trailers. The portfolio includes compressed-air brake systems for tractors, telescopic loaders, wheel loaders, forage harvesters, mobile excavators and graders, compressed-air brake systems for trailers including brake calculations, compressed-air supply and cleaning systems, as well as trailer couplings and adapter plates. Over more than 40 years, more than 5,000 system variants have been created; since 1985 around 70,000 systems have been sold, and the 100,000th was recently delivered. Manufacturing covers CNC turning, CNC milling, CNC tube bending, bending and joining techniques for sheet-metal parts and steel tubes in small and medium batch sizes; laser cutting and surface finishing are carried out by partner companies. Sub-assembly pre-assembly covers more than 8,000 kits per year. Customers are OEM manufacturers of agricultural, construction and commercial vehicles such as Komatsu, John Deere and Case IH as well as the agricultural machinery trade. The owner-managed family business, now in its third generation, produces at its headquarters in Bücken (Lower Saxony) and delivers worldwide.
- Site
- Bücken
- Processes
- Development and conception of compressed-air brake systems, Optimisation of compressed-air brake systems, Brake calculations for trailers, Measurements (build-up time measurement, tank volume testing, breakaway function of the yellow, On-site service (assembly, commissioning, technical consulting), Training on compressed-air brake systems, Sub-assembly pre-assembly (more than 8,000 kits and assemblies per year, small and medium, CNC turning
- Materials
- Steel (steel tubes), Plastic tube, Sheet metal, Couplings/drawbars according to DIN 74053, DIN 74054, DIN 11026, DIN 11043, Steel, Steel tube, Original WABCO brake devices
- Certificates
- DIN EN ISO 9001:2000, ISO 9001
- Founded
- 1988 (Tiet
- Industries
- Agricultural machinery manufacturers (OEM), Construction machinery manufacturers (OEM), Commercial vehicle and trailer manufacturers (OEM), Agricultural machinery trade, Off-highway, Commercial vehicle/trailer manufacturers (OEM)
- 01
Development and conception (CAD, brake calculation, FEM analysis)
- 02
Manufacture of sheet-metal parts and steel tubes (CNC turning, CNC milling,
- 03
Purchased brake devices (mainly WABCO)
- 04
Sub-assembly pre-assembly (small and medium batch sizes)
- 05
Measurements and testing (build-up time, tank volume, breakaway function)
- 06
Documentation creation (installation instructions, spare parts lists)
- 07
Homologation/support of approval
- 08
Shipping, spare parts distribution, on-site service and training
Materials & Processes
Steel
Basis for sheet-metal parts, brackets, holders, trailer couplings and adapter plates.
Steel tube
Pre-bent connecting tubes between compressor, pressure regulator and valves, manufactured on CNC tube bending machines.
Plastic tube
Lines of the compressed-air supply and brake systems with plug-in connectors and colour marking.
Original WABCO brake devices
Components such as compressor, pressure regulator, trailer control valve and air dryer as the core of the systems.
Locations
Bücken
DEHeadquarters, production, sub-assembly pre-assembly, warehouse, office and training
- Lot size
- Small and medium batch sizes
- Materials
- Steel, steel tube, sheet metal, plastic tube
- CNC lathe
- CNC milling machine
- CNC tube bending machine
- Press brake
- Conformity Test Unit (CTU) for build-up time and tank volume measurement
Parts & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Development and conception of compressed-air brake systemsEngineering | – | – | – | – | – |
| Optimisation of compressed-air brake systemsEngineering | – | – | – | – | – |
| Brake calculations for trailersEngineering | – | – | – | – | – |
| Measurements (build-up time measurement, tank volume testing, breakaway function of the yellowTesting | – | – | – | – | – |
| On-site service (assembly, commissioning, technical consulting)Assembly | – | – | – | – | – |
| Training on compressed-air brake systemsEngineering | – | – | – | – | – |
| Sub-assembly pre-assembly (more than 8,000 kits and assemblies per year, small and mediumAssembly | – | – | – | small batch sizes – medium batch sizes | – |
| CNC turningMachining | – | – | – | small batch sizes – medium batch sizes | Steel |
| CNC millingMachining | – | – | – | small batch sizes – medium batch sizes | Steel |
| CNC tube bending (e.g. bending cooling coils)Forming | – | – | – | small batch sizes – medium batch sizes | Steel tube |
| Bending of componentsForming | – | – | – | small batch sizes – medium batch sizes | Sheet metal |
| Joining techniques (various)Joining | – | – | – | – | – |
| Laser cutting (via partner companies)Machining | – | – | – | – | Sheet metal |
| Surface finishing (via partner companies)Surface | – | – | – | – | – |
| Manufacture of sheet-metal parts and steel tubes (prototype construction, tool and jig construction)Machining | – | – | – | small batch sizes – medium batch sizes | Steel, Sheet metal, Steel tube |
| FEM analysis (finite element method) for trailer coupling constructionsEngineering | – | – | – | – | – |
| Manufacture of compressed-air brake systems for towing vehicles and trailers (original equipment andAssembly | – | – | 4.5 t – 24 t | – | – |
| Manufacture of trailer couplings and adapter plates (50 mm ball-head coupling, K80,Assembly | – | – | – | – | Steel |
| Manufacture of compressed-air supply systems (for combine harvesters, wheel loaders, tractors etc.)Assembly | – | – | – | – | Steel tube, Plastic tube |
| Manufacture of compressed-air cleaning systems (knotter cleaning,Assembly | – | – | – | – | Steel tube, Plastic tube |
| Manufacture of training walls for compressed-air brake systemsAssembly | – | 1600 x 960 mm | – | – | Steel |
| Spare parts distribution and repair kits for WABCO componentsAssembly | – | – | – | – | – |
5 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC lathe | – | – | – | – | Bücken |
| CNC milling machine | – | – | – | – | Bücken |
| CNC tube bending machine | – | – | – | – | Bücken |
| Press brake (bending of components) | – | – | – | – | Bücken |
| Conformity Test Unit (CTU) - measuring equipment for build-up time and tank volume | CTU | – | – | – | Bücken |
Additional services
Reference customers
Quality
Every delivered compressed-air brake system is documented piece by piece and given a serial number; every fully assembled unit undergoes a final inspection. Measurements such as build-up time, tank volume, breakaway function and vehicle deceleration are documented according to a defined test protocol (Conformity Test Unit).
| Evidence | Bücken |
|---|---|
| ISO 9001 |
History
- 1936
Wilhelm Tietjen establishes a forge (foundation stone)
- 1950
Start of repairs on agricultural vehicles
- 1952
Hiring of the first apprentice
- 1953
Wilhelm Tietjen builds a new workshop
- 1978
Takeover of the business by Dipl.-Ing. Jürgen Tietjen; development of the first compressed-air brake systems with 3 employees
- 1988
Founding of Tietjen GmbH
- 1990
Construction of a new workshop hall
- 1996
Demolition of the old forge and workshop; construction of a new office building and workshop hall
- 1999
Certification according to DIN EN ISO 9001:2000
- 2002
Construction of an additional warehouse
- 2006
Extension of the office wing
- 2008
Extension of the office wing
- 2011
Hauke Tietjen joins the management (3rd generation)
- 2012
Construction of a new production and warehouse hall (1,800 m²) and a new office and training building (900 m²)
- 2020
Extension of the old office building including construction of a new fire water supply