Partners in Precision Bearing Closures Bearing closures are available in two basic types - shields and seals. Both closure types are generally ordered as integral components of deep groove bearings. Closures serve the same purposes with varying effectiveness - they exclude contamination, contain lubricants and protect the bearing from internal damage whilst being handled. Closures are attached to the outer ring of the bearing. Seals are defined as closures which contact the inner ring, while shields clear the inner ring. Both are designed so that the stringent precision tolerances are not affected by their use. Selection of Closures Determining the proper closure for an application involves a trade-off, usually balancing sealing efficiency against speed capability and bearing torque. Shields do not raise bearing torque or limit speeds, but they do have low sealing efficiency. Seals are more efficient, but they may restrict operating speed and increase torque and temperature. Another consideration in closure selection is air flow through the bearing. This is detrimental because it carries contamination into the bearing and dries out the lubricant. It is preferable to use seals if an air flow is present. A number of types of closures are available from Barden. Please contact us for more information. Our Bearings Deep Groove Ball Bearings Angular Contact Ball Bearings Bearing Cages Lubrication Bearings Closures Bearings Selection Hybrid Bearings Full Complement Bearings Market Sectors Aerospace & Defence Medical Systems Vacuum Technology Specialist Solutions Space Applications Custom Design Company COVID-19 Guidance Company History Certification Code of Conduct Conditions of Sale and Delivery News Contact Us Partners in Precision The Barden Corporation (UK) Limited Plymbridge Road, Estover Plymouth, Devon PL6 7LH, UK Tel: +44 (0) 1752 735555 Fax: +44 (0) 1752 733418 Restriction of the distribution area This website is not aimed at addressees in the USA or any other country of North, South or Central America. The goods shown here are neither offered nor delivered in the aforementioned areas. © Copyright 2021 Barden Bearings Contact Privacy Policy Terms Of Use Sitemap Join the Team C