Everything, you need
At GRUEBER, quality and precision are the focus of our work. Our bent parts, compression springs, tension springs, torsion springs and buffer springs offer customised solutions for various requirements. Whether for industrial applications, mechanical engineering or special projects – every spring and bent part is manufactured with the highest care to ensure optimum use and long-term reliability.
It’s the people who make the difference at GRUEBER
Research and development
At GRUEBER, technical progress has a long tradition. Because our aspiration is to act as a driving force, we continuously and proactively develop new possibilities for optimisation. To do so, we are always looking for new materials, surface treatments, production processes and machinery solutions as well as testing and inspection devices.
The benefit: we provide support for our customers, even if there are complex questions and challenges to master on the way to innovation. This is how we bring ourselves dynamically into our customers’ development processes and make contributions toward pioneering products and solutions.
Individual advice
Here we look beyond the horizon and design our products, down to each detail, so that they provide the maximum technical and economic benefits. Because our services have been proven in practice, we offer our customers the best possible support, above and beyond our products.
Suitable, high-quality materials
Selecting the right material is particularly important for the trouble-free, long-term function of our springs and bent parts. In terms of their product design, our customers benefit from the extensive materials expertise of our designers and engineers. Moreover, we rely on quality suppliers, who always provide us with high-quality materials that meet standard requirements.
Quality. made in Germany
With us, technical progress has a long tradition. Our objective is to be a driving force, and we continuously and proactively develop new possibilities for optimisation. To this end, we consistently search for new materials, surface finishes, manufacturing processes, machine solutions and testing and inspection equipment.
We implement the GRUEBER quality idea along the entire value chain using a quality management system certified in accordance with DIN EN ISO 9001:2015. We used advanced quality testing stands to check the quality of our products. In this way, we can continually carry out service life testing on our response spring testing stand or endurance testing stand.
Computer-controlled manufacturing
Cold forming
Also in the cold forming process, the quality and traceability of primary materials as well as of suppliers are of particular importance to us. We pay attention to every detail, from transport and storage of the wire coils and across all manufacturing stages up to certified quality checks and delivery of the final products. Forming on innovative, CNC-controlled coiling machines as well as our transparent tool management or the defined monitoring and optical measurement of geometries, plus controlled heat treatment after coiling – all this leads to products that have proven to be reliable and durable for decades.
- stainless steel 1.4310 (EN 10270-3)
- heat-treatable steel 51 CrV4 (EN 10089)
- patented spring steel SH (EN 10270-1)
- oil tempered spring steel (EN 10270-2)
- heat-resistant spring steel Nimonic 70
- Inconel X750 | Ø 2 – 25 mm wire diameters | unit weight: 0,05 – 25,00 kg | production capacity up to 5,000 tonnes
Hot forming
The manufacturing process of hot forming starts with tested, top-quality primary materials from selected suppliers. Through controlled heating in the forming process on CNC-controlled coiling machines, the materials and surfaces are processed as carefully as possible. In order to avoid decarburisation, the robots in our production lines transport the springs directly from the forming temperature into the hardening medium. In quality-assured processes, constant temperatures and times (in hardening and tempering) guarantee the constant quality of our products.
- alloy spring steels 51 CrV4 / 52 CrMoV4 according to EN 10089 | Ø 18 – 65 mm rod diameters | unit weight: 4.5 – 200 kg | production capacity up to 6,000 tonnes
Protection and durability
In daily use, GRUEBER springs and bent parts are often exposed to harsh weather and environmental conditions. So that the products function safely and reliably over the long term, we use various surface treatments to ensure high-quality protection. Most important here: liquid coating with water-based products and powder coating, including pre-treatment with zinc-manganese phosphating. Of course, we are happy to customise the surfaces based on other customer requirements.
On request:
- Identification by colour coding
- Pad printing
- Manufacturer labelling
- Labelling tape
- Heat-resistant spring steel Nimonic 70
- Labelling
Holistic logistics concept.
Just in time.
One essential aspect of our understanding of quality is to make products available in the right place at the right time. We act quickly and reliably, we are there for our customers, and we think ahead. This applies also – and in particular – to our logistics concept, which guarantees just-in-time delivery as well as the adaptation to customer processes in development and production.