Product category:
Bearings
News Release from: NTN Bearings (UK) | Subject: FA tapered roller bearings
Edited by the Engineeringtalk Editorial
Team on 08 April 2004
Heat treated steel boosts bearing
performance
FA tapered roller bearings are produced using steels subjected to a novel form of heat treatment that produces ultrafine austenite grains less than half the size found in conventional bearing steels.
A novel form of heat treatment (FA treatment) produces ultrafine austenite grains less than half the size found in conventional bearing steels, using the inherent increase in the fatigue strength of steel as the grains become smaller Using this proprietary FA treatment, NTN has developed its FA tapered roller bearings which allow bearing sectional areas only 60% that of conventional bearings
This article was originally published on Engineeringtalk on 6 Dec 2004 at 8.00am (UK)
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Such a reduction in package size can be especially useful in today's compact cars.
As automobile transmissions become more compact, the demand for smaller transmission bearings is growing.
But the limited fatigue strength of conventional carburised steel has restricted the ability to meet market demands for more compact tapered roller bearings.
NTN's FA tapered roller bearings apply the FA treatment to bearing steel while simultaneously increasing precision and optimising the bearing inner race specifications to improve the anti-seizing capacity of the flange section, which has typically been the major problem for downsized bearings.
With this new technology, the newer, lighter bearing sectional area and weight can both be reduced to 60% the level for conventional bearings under the same conditions.
NTN plans to develop the FA tapered roller bearings into a series of high-performance tapered roller bearings.
For equivalent service life, ability to withstand shock, and antiseizing capacity of conventional bearings, the new bearing sectional area and weight can both be reduced to 60% of current levels, resulting in lighter, more compact bearings.
Applications include automobile transmissions, gearboxes, wheel bearings and transfer cases.
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