NSK introduces HPS angular contact ball bearings
A
NSK UK product story
Edited by the Engineeringtalk editorial team
Aug 25, 2009
NSK has introduced the High Performance Standard (HPS) range of angular contact ball bearings, which is designed to meet the operating demands of the global pump industry.
The basic dynamic load rating of these bearings has been improved by 20 per cent, increasing bearing 1L10 life by up to 90 per cent.
The HPS range of angular contact ball bearings have an improved basic dynamic load rating that allows for longer maintenance intervals
This allows for longer maintenance intervals and can enable a reduction in bearing size for new pump designs.
The optimal design characteristics that provide longer-life operation on the HPS series are also key to the higher-speed operation of the bearings, the permissible speed being increased by 15 per cent to 20 per cent compared to conventional angular contact ball bearings.
The major benefit of this increase for pump users is reduced operating temperatures, enabling the bearings to operate in a higher range of high-speed pumping applications.
The efficiency of the HPS design also means that the bearing's improved higher-speed capability is delivered at the same time as bearing accuracy is maximised.
This is evidenced by a running accuracy to ISO tolerance class P5 and a dimensional accuracy to ISO tolerance class P6.
These tolerances enable tighter control of shaft run-out, aiding the performance of the mechanical seal and improving overall pump efficiency.
A choice of three cage materials enables the HPS series of bearings to be configured to meet the operating requirements of most pumping applications.
The cage materials include: glass-fibre-reinforced polyamide 46, which provides high strength even at high temperatures; L-PPS resin, for applications where chemical and oil resistance is critical; and machined brass, which offers high reliability and compliance with API 610 standards.
The HPS range of angular contact ball bearings is available in the 7200 series and 7300 series, from 12mm bore to 80mm bore, and can be retrofitted during general maintenance to upgrade standard industrial bearings or included during the initial design to provide superior performance.
1L10 life means that, statistically, at least 90 per cent of the bearings exposed to the maximum indicated loads will reach the number of operating hours predicted.
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