SKF Launches New Series of SKF-SNFA Super-precision Bearings at CIMT Fair 2009 in Beijing
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May 19,2009
Following last year's launches of two new series in the new generation SKF-SNFA super-precision bearings, SKF now announces the next three series for the demanding requirements in Machine tools, such as metal cutting & wood working machines, Electro spindles, high speed machining centre spindles, high speed milling spindles.
High speed angular contact ball bearing in B design: S70/S719(HX/S,HB/S)
These pre-lubricated bearings are particularly suitable for metal cutting and woodworking machines.
The bearings are high speed, ready-to-mount, sealed super-precision angular contact ball bearings in the S70..B (HX../S) and S719.. B (HB.. /S) series, characterized by high-speed capability, high stiffness, extended bearing service life, low heat generation & compact cross section.
These pre-greased and sealed super-precision bearings can prevent the problem of premature bearing failures resulting from contamination. Non-contact seals keep the grease in and contaminants out of the bearings, with low temperature rise and high speed capability.
To accommodate the diverse operating requirements of precision applications, bearings in these series are available with three contact angles and two ball materials; steel and ceramic. The bearings are manufactured to tolerance classes P4A & PA9A and accommodate shaft diameters ranging from 30 to 120 mm.
Those suitable for universal matching or mounting in sets are produced to three preload classes. The bearings are fitted, standard, with a seal on both sides. Bearings without seals (open version) are also available.
Double direction angular contact thrust ball bearing in BTW (2344) series:
These bearings were redesigned to meet the load, speed and stiffness requirements of modern machine tools. This new series is dimensionally and functionally interchangeable with the former 2344 (00) series.
The BTW series bearing consists of two separate angular contact thrust ball bearings that are mounted back-to-back. This new design, which does not use a spacer sleeve, makes mounting faster, easier and more accurate
The new design is also suitable for manufacturing upgrades, providing better control of preload and better control of contact angle leading to reduced noise and vibration levels. These improvements combined with the 60° contact angle and high number of balls provide a high degree of axial stiffness.
BTW series bearings are also available with ceramic (silicon nitride) balls that provide a number of benefits - reduces heat generated by the bearing, Increases stiffness, Increases service life of the bearing, higher speed and also extends maintenance intervals.
The new BTW series, which correspond to Diameter Series 0 for radial bearings, are manufactured in accordance with ISO 15:1998. Bore sizes range from 35 to 200 mm.
'NitroMax': the super tough steel for high performance
SKF-SNFA super-precision bearings with the new 'NitroMax' steel are particularly suitable for very demanding applications such as high speed machining centre spindles and high speed milling spindles where the requirements in terms of speed, rigidity and bearings service life are very high.
NitroMax is a new generation of hard, fine and super clean martensitic high nitrogen stainless steel with superior corrosion resistance, enhanced fatigue properties and high toughness.
SKF-SNFA bearings with NitroMax steel rings and ceramic rolling elements combines the high resistance to wear and corrosion with the ability to over roll contamination particles, thus reducing considerably particle related wear and damage. Ceramic rolling elements also have the well known advantages of low density (less stress generated by centrifugal forces), very low friction which enhances wear resistance and cool running even with poor lubrication, and higher modulus of elasticity making the bearing stiffer.
Other new SKF-SNFA Super-precision series will be launched later this year.
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1.The news above mentioned with detailed source are from internet.We are trying our best to assure they are accurate ,timely and safe so as to let bearing users and sellers read more related info.However, it doesn't mean we agree with any point of view referred in above contents and we are not responsible for the authenticity. If you want to publish the news,please note the source and you will be legally responsible for the news published.
2.All news edited and translated by us are specially noted the source"CBCC".
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