HIGH LOAD RATINGS COMBINED WITH SMALL BORE SIZES
Highly stressed angular-contact ball bearings for ball screw support applications
The new angular-contact ball bearings from the TAC-SHR series were specially
developed for use in ball screws. Although they have smaller bore sizes than the
existing TAC-HR series, they boast the same load carrying capacity. This means they
permit machine manufacturers to produce more compact constructions.
Ball screws enable fast, precise, energy-efficient linear movements – even when they
are subjected to heavy loads. These highly loaded drive systems need bearings with
low friction and high load capacity. For this reason, multiple-row angular-contact ball
bearings with extra-large balls, which are capable of supporting high axial loads, are
used. NSK's TAC-HR series has proved invaluable for such demanding requirements,
lasting around five times as long as conventional angular-contact ball bearings.
NSK has now further enhanced this range, and will be presenting its TAC-SHR series
of angular-contact ball bearings at the EMO trade fair. The main difference between
the TAC-HR series and the new range is the latter's smaller bore size. This enables
ball screws with smaller shaft diameters to be used at the shaft end, without the need
to increase the number of ball bearings per assembly.
This in turn makes it possible to realise more compact power train constructions, thus
enabling designers in the machine tool industry to reduce the required installation
space. Despite their smaller dimensions, the bearings in the TAC-SHR series have the
same load ratings as those in the TAC-HR range. NSK was able to achieve this by
taking a number of steps, including optimising the design so as to keep the critical
surface pressure on the shoulder of the inner ring at a level that does not shorten the
bearing's service life.
The new bearings are available for shaft diameters of 40 to 120 mm. NSK supply them
as ready-to-mount units with the required preload. From the customer's point of view,
this cuts costs and means that ball screws with a smaller outside diameter can be
used. The reduced bearing friction increases energy efficiency and drives down
operating costs for the whole system.
As the world's largest producer of ball screws, NSK can also offer complete linear drive
solutions along with rotary bearings. The new series of NSK ball screws and linear
guides for demanding applications in the machine tool industry will also be showcased
at the EMO trade fair – just visit stand B 16 in hall 7.
About NSK
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,
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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, France 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.
Editor Contact
DMA Europa Ltd. : Elizabeth Preciado-Achury
Tel: +44 (0)1562 751436
Fax: +44 (0)1562 748315
Web: www.dmaeuropa.com
Email: [email protected]
Reader Contact
NSK UK Ltd : Helena Measham, Customer Service & Marketing Communications
Manager
Tel: 0500 2327464
Web: www.nskeurope.com
Email: [email protected]
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