Development of “ULTAGE Large Size Tapered Roller Bearing” [World No. 1 high-load capacity and high rotational precision!]
NTN Corporation (hereafter, NTN) has developed the “ULTAGE*1 Large Size Tapered Roller Bearing” that delivers the world's highest standard of high-load capacity and high rotational precision with optimizations made to the internal bearing design.
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Bearings used in various plant equipment for steel and wind turbines,
general industrial machinery such as construction and mining machinery
are subjected to harsh environments during operation, including
vibrations and shocks, and thus require a high load capacity. High-speed
shafts of gearboxes and reducers are increasing in output and
efficiency, and require high rotational precision.
The newly
developed “ULTAGE Large Size Tapered Roller Bearing” has an optimized
internal design compared to conventional tapered roller bearings*2 and
reviews made to the crowning shape*3 of the roller in particular allows
the bearing to maintain a uniform contact pressure between the rolling
element and raceway, even when subjected to high loads. This gives the
bearing a high-load capacity that is 1.3-times or higher than the
conventional product, and improves the rated life of the bearing 3-times
or more and the load resistance 2-times or more. Sliding contact
sections between the rollers and inner ring have an optimum shape to
control increases in the rotational torque and temperature increases,
which raises the permitted rotational speed by approximately 10% to
offer the world's highest load capacity and high rotational precision.
The
developed product also features special heat resisting treatment on the
bearing steel to limit the rate of dimensional change of the bearing
over time during use to less than 1/10 that of conventional bearings
using bearing steel (less than 1/4 for case hardened steel), which
maintains high performance when used over long periods of time.
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With the “ULTAGE Large Size Tapered Roller Bearing,” NTN meets demands for “long operating life,” “load resistance” and “high rotational precision” required for general industrial machinery, and will also increase the large series lineup with bearing outer diameter of 270 mm or more while expanding global sales activities. *1) ULTAGE is the name for NTN's new generation of the world's highest standard of bearing series, and expresses the "ULTIMATE" performance on any type of "STAGE." *2.) NTN catalog: CAT.No.2250/J “Large tapered roller bearing” *3.) Cylindrical shape where the diameter of rollers gradually becomes smaller on a micron scale in the direction of the edges
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Features Compared to conventional products (large tapered roller bearing) (1) Bearing rated life: 3-times or more (1.3-times or more high load capacity) (2) Load resistance: 2-times or more (3) Permitted rotational speed: approximately 10% improvement (4) Rate of dimensional change: 1/10 or less (bearing steel), 1/4 or less (case hardened steel) https://www.uswatchestore.com/
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Applications Steel production equipment, wind turbines, general industrial machinery such as construction and mining machinery. https://www.discountswatches.com/
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Inquiries about this release Product photo Example of main dimensions: φ200 × φ280 × 51 mm (photo is when the bearing is opened) http://www.aplrsw.com/
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