The Journal of Industry and Technology

Industrial Analytical Instrumentation

Euro Technology

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Precision bearings and condition monitoring

NSK´s APTSURF™ cylindrical roller bearings offer
high precision and performance for machine tool users

APTSURF™ from NSK is a new range of high precision, high performance cylindrical roller bearings designed for the main spindle of machine tools. End users will benefit from enhanced spindle reliability and an improved surface finish, particularly in lathes and turning centres, principally through a 55% reduction in rotational vibration levels. A further advantage is 60% extended life, which is achieved through optimisation of the bearing's internal design and innovative manufacturing technology. Rotational vibration is reduced 55% when using NSK´s APTSURF™ cylindrical roller bearings

In recent years, the need for better machining quality and greater reliability has expanded in line with expectations from an increasingly competitive component manufacturing marketplace. With APTSURF™, NSK set about addressing this issue in a number of ways; firstly through the precision enhancement of each bearing part. Here, the RMS (root mean square) value of vibration at 2000 rpm is decreased by 55% in comparison with conventional bearings. In turn, the surface finish quality of parts produced by the lathe will also be improved.

Further enhanced features that will be of interest to machine tool builders include an increase of 15% in the dynamic capacity, and 60% longer operating life, again in comparison with conventional bearings.

The bearings are available in outside diameters of up to 360mm and with an accuracy rating of P4 or higher. In total, NSK is anticipating global sales from the series of approximately ¥3 billion (€23.6 million) in 2016.

NSK in profile
Established almost 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 30,500 employees in 29 countries. As per March 2014 NSK achieved a turnover of 6,2 billion Euros. 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 900 million Euros as per March 2014.

For further information, view website: 
Refer to page 399

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