LEGROM GmbH
About us
LEGROM GmbH is an internationally operating, traditional industrial enterprise headquartered in Schwäbisch Hall, Germany. Founded in the late 1940s, LEGROM combines over 70 years of expertise in the development and manufacture of technical plastic solutions and precision injection molds with modern engineering excellence.
LEGROM serves as a trusted partner for customers in diverse sectors including mechanical and plant engineering, textile machinery, and the bearing industry, delivering high-quality components worldwide. The company’s broad product range encompasses precision injection molded parts, tool and mold solutions, and customized technical components tailored to complex industrial requirements.
A highlighted innovation in LEGROM’s portfolio is the LEGROM VARIO flexible hose system – a modular solution designed for flexible fluid and coolant management in machinery and production processes.
The success of LEGROM is rooted in the performance, efficiency, and deep expertise of its team, its commitment to precision and quality, and a collaborative approach to solving technical challenges with customers globally.
Products & services
Engineering - redefining service
Continuous technological evaluation and benchmarks and targeted dialogue with customers and suppliers enable us to ensure that the technologies we provide for your products are safe, efficient and technologically sophisticated – from development and material selection to production. We are more than happy to advise you on all questions relating to materials and production options, and we develop suitable technologies and support you from the development of prototypes and mold construction phase right through to series production of your new products. New products need to be ready for the market in the shortest possible time – and the benchmark for new developments of components and assemblies is today higher than ever. LEGROM developments at a glance: Development of small and precision components and assemblies Consulting on material selection and component design (for plastic components) Series development, including prototype development and rapid prototyping Material substitutions (e.g. of metals) using highly resilient and cost-effective plastics Function and performance testing of components and assemblies
Mold construction
Our services at a glance: High-performance precision injection molds, with core working steps all realised without exception in in-house processes at LEGROM In-house project management Simulation of temperature control, filling behaviour, shrinkage and warping 3D-based mold design (Step, Catia, IGES, Solidworks interfaces) 3D simulations State-of-the-art equipment Automated EDM centres Electrode production on automated HSC milling centres Palletised hard milling, sinker and wire EDM Mold maintenance Prototype production Mold sizes up to 546 x 646 mm Cost-effective injection molds from Eastern Europe and Asia Short delivery durations for injection molds Prototype molds with a short delivery duration Prototype construction Time to market – a factor which is increasingly important today. It is therefore possible at LEGROM to generate parts in good time which correspond to series parts. LEGROM has a variety of standard mold forms with different concepts into which mold inserts with different functions can be integrated. Sample parts which often do not differ from series parts can be manufactured rapidly and inexpensively in this manner. Sophisticated mold concepts enable the realisation of most sprue types, different slide directions and core pulls. LEGROM offers its customers the chance to create high-quality samples in good time with this concept, and several thousand of these can also be manufactured to a consistent quality level. We can create prototypes of every kind for you for demonstration purposes, initial trial series or small-scale series: Stereolithography Laser sintering Vacuum molding 3D printing Milled plastic or aluminium parts Prototype molds adapted to suit your quantities
Plastic bearing cages
LEGROM is one of the pioneers in the development, mold design and production of bearing cages made of technical plastics and thermoplastics resistant to high temperatures and has been regarded as a specialist in this area for more than 60 years on a global level. The first plastic bearing cage, manufactured at that time from Perlon polymer, was created at LEGROM as early as the 1950’s. Use of the latest production techniques and special production processes enables LEGROM to meet even the most unusual customer requests in the modern roller bearing industry. Needle bearings | Angular contact roller bearings | Linear bearings | Axial bearings | Ball bearings | Thin section bearings | Radial bearings Thermoplastics for bearing cages PA 6 | PA 6.6 | PA 6T/6 | PA 6T/6I | PA 4.6 | POM | PPA | PES | PEEK | PAEK | LCP Fillers Glass fibers | Carbon fibers | Aramid fibers (Kevlar) | Special recipes with mixed reinforcement | Tribologically modified graphite, PTFE
Plastic injection molding
Production at LEGROM is almost exclusively fully automated. To ensure optimum injection molding conditions, the granulated material is pre-dried in a central drying system and then fed from there to individual machines via a pipe system. Our state-of-the-art machinery and spotless machine environment meet all the prerequisites needed to assure the level of quality and flexibility demanded. Consulting in plastics technology Global delivery capability Injection molding machines with closing forces ranging from 350 to 2000 KN Injection moldings ranging from 0.01 to 400 grams in weight Single and multi-component injection molding Insert molding (metal and ceramic) Depositing of components through handling systems or robots High-performance thermoplastics at LEGROM Practically every high-performance plastic available on the market is used at LEGROM, ranging from PA, PBT, POM or ABS to PMMA, PPO, PPA, PAA and PES, PSU or PEI engineering plastics to high-performance thermoplastics such as LCP, PPS or PEEK. LEGROM has the appropriate solution for every plastic, both in mold construction and injection molding production. LEGROM also processes all conventional fillers, including glass fibers, carbon fibers, glass spheres, PTFE, carbon or titanium dioxide. Special mold materials and special machine equipment is available for every filler. LEGROM can realise up to 70% filler content of the raw material. Thermoplastics PA 6 | PA 6.6 | PA 6.10 | PA 12 | PA6T/6 | PA6T/6I | PA 4.6 | PBT | POM | ABS | PMMA | PPO | PPA | PAA | PES | PSU | PEI | LCP | PPS | PEEK | PAEK | PC-ABS | PC | PC-HT | PCT | PET | TPE-U | TPE-E | TPE-O | TPE-S | TPE-V Fillers Glass fibers | Carbon fibers | Glass spheres | PTFE | Carbon | Titanium dioxide | Aramid fibers (Kevlar) | Long fiber materials | Special recipes with steel fibers, mixed reinforcement, tribological modification
Duroplastic processing
Injection molding machines with closing forces ranging from 350 to 500 KN Injection moldings ranging from 0.2 to 100 grams in weight Duroplastic molding compounds are high-quality design materials which have a firm place in many engineering applications. With its excellent mechanical, chemical and electrical properties, Duroplast achieves impressive results during substitution of metals (e.g. aluminium and zinc die cast components). In contrast to thermoplastics, duroplasts consist of thermally irreversible cross-linked macromolecules. This results in a great many positive characteristics: High strength, rigidity and surface hardness High dimensional stability Low thermal expansion coefficient, uniformity of length, width and height Good thermomechanical behaviour Low creep tendency High chemical resistance No stress corrosion Low swelling High thermal resistance Favourable fire behaviour without halogenated flame retardants Safety reserves at temperature peaks High electrical and thermal insulating properties High resistance to media
Installation / Product finishing
A further LEGROM speciality is the processing of plastic components. Targeted integration of special subcontractors enables us to offer high-precision – but extremely cost-effective – labelling, welding and joining processes. Finishing of plastic components is either integrated into the molding process in this context, or incorporated as a separate process during assembly configuration in the logistics department. Our individual technologies: Laser marking Printing (tampon printing, screen printing) Hot stamping Painting Ultrasonic welding Configuration of complete assemblies Integration of third-party services Development of test systems with electronic components Continuous innovation and technical advances at LEGROM facilitate the joining of individual plastic components or configuration of complex assemblies.
Foaming
Unleash Precise Foaming with LEGROM’s Advanced Dosing Technology At LEGROM, we’re dedicated to innovation in our production processes. That’s why we utilize a state-of-the-art low-pressure mixing and dosing system specifically designed for exceptional foam production. This advanced technology allows us to achieve: Unmatched Control: Our system ensures precise and consistent foaming for every application. Reliable Performance: Experience worry-free production with a robust, cellular design that prioritizes efficiency and uptime. Tailored Solutions: The system can handle various materials, allowing us to create the perfect foam for your specific needs. Unwavering Quality: Benefit from exceptional process stability, guaranteeing consistent, high-quality results in every batch. LEGROM foaming system. Technical specifications: Shuttle table x2 -1100 x 1600 Material: Polyurethane – Fermapor Grades: K31-A-45C4-UL-FR & K31-B-16-FR ⇒ Flame protection optional Grades: K31-A-9575 & K31-B-RF ⇒ Explosion protection
Spare parts for textile machinery
LEGROM GmbH has been a manufacturer of textile machine components for open-end, vortex and ring spinning for decades. Our products are supplied to both OEM´s for original equipment and spindle manufacturers for direct use in spinning mills. Based on the latest technology, these parts have been installed and proven their value a million times over in daily operations in spinning mills. Our objective is to develop and produce interesting, innovative and efficient products of the highest quality on a continual basis for the benefit of our customers. We provide our customers with spare parts for textile machinery, either directly or through our distribution partners. Spinning mills all around the world value the quality and durability of our spare parts.
LEGROM VARIO SYSTEM®
LEGROM VARIO SYSTEM® The variable flexible hose system The unmistakeable flexible hose system in its typical green/yellow and black/yellow colour combinations is a byword for efficient use on machinery, production plants and equipment. From the classic coolant hose / drilling oil hose to the intelligent flexible articulated hose and flexible hose system. We react with the same flexibility of our flexible hose system to market needs and the requirements of our customers. We have been developing and distributing our superior-quality, versatile system for more than 25 years for sustained use in many sectors and workplaces. Sharply increasing demands for even higher processing speeds, surface qualities and longer service lives of processing molds and simultaneously severe cost pressure require the thorough and targeted use of coolant and lubricating fluids for the following applications: Turning | Drilling | Grinding | Milling | EDM The LEGROM VARIO SYSTEM® can also be used for problem-free and accurate blowing out of chip material during machining of workpieces and suction extraction of liquids, dust, vapour and smoke. The versatility and numerous combination options of our flexible hose system are also particularly demonstrated when it comes to special production cases. Our development department, mold construction and plastics processing enable us to react with speed and precision to specific customer requirements and implement these.