NSK has introduced a free guide entitled ‘Bearings for Pumps and Compressors’, which contains detailed information on the latest bearing designs and technologies, helpfully matching them to various pump types used commonly in the mining and quarrying industry.
Optimised ball and roller bearing selection ensures that pumps and compressors are able to deliver increased performance and economy. Furthermore, choosing the right bearing can help reduce the physical size of pumps and extend the prime maintenance metric of mean time between failures (MTBF). At mine and quarry facilities, pumps are a vital part of many extraction, handling and processing tasks, where any failure can result in a sudden loss of productivity and cause maintenance costs to spiral. Depending on the design, pump bearings can run under axial loads, radial loads or a combination of the two. In addition, running speeds can vary widely, as can lubrication conditions, but long life, or a high MTBF, remains a constant demand. Pumps come in many variants, including centrifugal, piston, vortex, impeller and screw types. Depending on the media being transferred, each has its own requirements in terms of bearing design, which has resulted in NSK providing application-specific solutions.
A good example of this would be centrifugal pumps which require a bearing that can accommodate elevated axial loads while delivering minimal play. Here, NSK’s recommended solution is its HR High Reliability Deep Groove Ball Bearing, which has larger rolling elements than standard deep groove ball bearings. This design can increase dynamic loading capacity by up to 19% and improve pump life.
Piston pumps are often required to operate under heavy axial and radial loads, with a need for precise bearing mounting and compatibility with the lubricating oil. In this case, NSK has developed a Cylindrical Roller Bearing with special L-PPS cage, which has superior heat and wear resistance, and offers chemical stability.
Extended running with minimum maintenance are principal demands placed on submersible pumps. However, the life of the pump’s top bearing can be reduced significantly by creep, which is caused by the combination of a light radial load and a loose fit in the housing. Wary of this common industry issue, NSK has developed a creep-free solution that integrates double O-rings into the bearing’s external surface.
Much more information can be found in NSK’s guide to ‘Bearings for Pumps and Compressors’, which offers details on specific mine and quarry pump applications, and the bearings best able to ensure efficient and reliable service. The guide also highlights the latest technology developments as well as industry case studies. The guide is available in print and online at: http://www.nsk-literature.com/en/pumps-compressors-bearings/
Established 100 years ago, NSK (Nippon Seiko Kabushiki Kaisha) is a Japanese-listed company that has evolved from a regional ball bearing supplier to a roller bearing specialist and automotive supplier with a global market presence. Today, NSK employs more than 31,500 employees in 30 countries. As per March 2016 NSK achieved a turnover of 975 billion Yen. This result has been driven by ever-increasing investment in research & development, enabling the company to continuously improve the quality of its products and services. This investment supports NSK’s objective of “No. 1 in Total Quality”. In addition to a complete rolling bearing portfolio, NSK develops and manufactures precision components and mechatronic products, as well as systems and components for the automotive industry, including wheel bearing units and electric power-steering systems.
In 1963, NSK’s first European subsidiary, Düsseldorf, Germany, was opened and in 1976, the first European production facility in Peterlee, England. Today, NSK Europe supports pan-European sales with production locations in England, Poland and Germany, logistics centres in the Netherlands, Germany and England and technology centres in Germany, England and Poland. In 1990, NSK purchased the UPI Group including the renowned European bearing manufacturer RHP, with its factory in Newark (UK). Additionally, NSK has developed a comprehensive network of authorised sales distributors. NSK Europe is divided into application-based business divisions: Industry rolling bearing technologies & linear and precision technology (EIBU) as well as bearing modules and steering systems for the automotive industry (EABU & ESBU). In this organisation, NSK Europe’s 3,500 employees achieved a turnover of over 1,000 million Euros as per March 2016.
For more information, visit www.nskeurope.com
NSK UK Ltd.
Northern Road, Newark
Phone: +44 1636 605123
Fax: +44 1636 602775
NSK Deutschland GmbH
Phone: +49 2102 481 2152
Fax: +49 2102 481 2151