EuroWire July 2021

Corporate News

Ringfeder locking assemblies

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80,000 fasteners to Ringfeder

Shrink discs in stainless steel

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Bumax, a Swedish manufacturer of premi- um stainless steel fasteners, has received orders for more than 80,000 screws from German drive and damping technology company Ringfeder Power Transmission in the past year. The fasteners have been in- stalled in more than 7,000 new Ringfeder shaft-hub connections around the world. Ringfeder Power Transmission, a long- standing Bumax customer, has used high-strength corrosion-resistant Bumax stainless steel screws since 2012, as they are able to transmit high torques with the company’s rustproof locking devices. “Bumax was the only company that could provide the high-strength fasteners with the corrosion resistance we required for our applications,” said Rainer Peter, Ringfeder senior product manager for shaft-hub connections.

Ringfeder primarily uses Bumax 109 and Bumax DX (Duplex) 129 screws to provide the necessary strength and corrosion resistance for its demanding applications. The German company operates in niche markets fordriveanddampingtechnology, offering shaft-hub connections, damping solutions and coupling systems for high functionality and durability requirements in a wide variety of industries. Bumax fasteners are now used for all stainless steel Ringfeder products, which are manufactured at the company’s production plants in Germany and the Czech Republic. “The unique advantage of Bumax 109 is its high strength, which means that we achieve the same transmission values with our rustproof shrink discs as our standard

shrink discs with screws of quality 10.9,” concluded Mr Peter. In 2016, Ringfeder also began using Bumax DX 129 screws for some of its products. DX 129 is used in applications where very high strength, ductility and corrosion resistance are required. It offers around 20 per cent higher strength than Bumax 109 and a high level of corrosion protection. Ringfeder rustproof locking devices are used as standard in gearboxes and pumps and other machines. The products are used by pharmaceutical companies, the food andbeverage industry, ingeothermal and hydropower power plants, and in ship drives and packaging machines. Bumax AB www.bumax-fasteners.com

Graphics bigstockphoto.com/Artist tereh

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July 2021