Product category:
Ballscrews, Linear Guides, Jacks, Dampers
News Release from: NSK UK | Subject: Ballscrews and linear guides
Edited by the Engineeringtalk Editorial
Team on 12 May 2000
Ballscrews and linear guides with
non-contact ball
Non-contact balls enable ballscrews and linear guides to run smoother and quieter with reduced vibration.
Non-contact balls enable ballscrews and linear guides to run smoother and quieter with reduced vibration Now, the new design of NSK-RHP's S1 series ball screws and linear guides employs engineering plastic retainers which eliminate direct ball- to- ball contact
This article was originally published on Engineeringtalk on 4 Jul 2008 at 8.00am (UK)
Related stories
Guide helps users avoid bearing failures
Free publication deals with all aspects of bearing procedures, including handling of bearings, mounting, maintenance and inspection, dismounting and bearing storage.
Positioning technology allows microscopic handling
NSK's micro-manipulation system features a three-axis (XYZ) positioning stage that facilitates the attachment of measuring devices, micromanipulators and microscopes for examining a preparation.
This results in lower noise and vibration (7dB and 10dB), and smoother and more stable running at low speeds.
The technology also enables S1 ball screws to offer up to 50% higher dynamic load capacity compared to ball screws that employ spacer balls.
Eliminating ball- to-ball contact reduces friction considerably and this gives the S1 ball screws improved dynamic torque performance at low speeds.
Further reading
Guide eases bearing changes
The guide provides replacement part numbers for metric bearings in bore diameters from 2 to 220mm and imperial sizes from 1/8in bore to 57.15in.
Bearing replacement saves money for fish processor
NSK's Silver-Lube bearings are designed specially for use in industries where hygiene considerations and corrosion and chemical resistance are important.
Added to this is improved smoothness in operation, resulting from improved ball control.
Further performance improvements also result because both noise and vibration are reduced: noise by as much as 7dB when compared to conventional ball screw designs.
The efficacy of using plastic spacers is apparent from tests which show that the new S1 design provides 60% greater stiffness than ball screws which use spacer balls, and only 5% less stiffness than designs which have a full complement of large balls and, therefore, commensurately higher levels of friction.
In terms of load capacities, too, the S1 series design offers optimised performance.
Static load rating is 80% higher and dynamic load capacity 50% higher than designs employing balls as spacers.
Moreover, when compared with full complement ball screws, dynamic load capacity is, impressively, just 10% less.
In common with all NSK-RHP's ranges of ball screws, the S1 series is built to high standards of precision and reliability.
The ball screws use a well proven tube type ball re-circulation system.
They have 4 point ball contact for maximum load capacity and are manufactured to an accuracy class up to C5.
The S1 series linear guides benefit from even greater levels of noise reduction, up to 10dB, as a result of NSK-RHP's new design.
Vibration levels are also commensurately lower.
The S1 linear guides provide smoother and more stable performance at low speeds because dynamic friction is reduced considerably, due to non contact of the balls.
Full dimensional interchangability of the S1 series guides with the most popular sizes (*15mm, 20mm, 25mm and 30mm) in NSK-RHP's existing LH and LS series ranges has been maintained with the new design, and maximum static and dynamic load ratings, at 67,200N and 35,800N respectively, are only slightly below those of the existing ranges.
* This size available in SS series only. Request a free brochure from NSK UK ...
• NSK UK: contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
Search the Pro-Talk network of sites
