Bearing Assemblies Save Screen Installation Costs

NSK's integrated screen units are providing manufacturers and repairers of vibrating screens with cost and installation savings at Hillhead 2010. The screen units are individually designed by NSK to meet manufacturer's requirements. They integrate high-strength housings, vibratory-specification bearings, seals, bolts and washers, into bespoke assemblies that are pre-greased and ready to install. This reduces inventory, installation and warranty costs, and offers the security of a single-source supply.

The screen units deliver all the features of integrated assembly to the quarrying/extraction industries, helping to improve the competitiveness of screen manufacturers in a number of ways. First, all of the design work and unit assembly is undertaken by NSK, reducing in-house design, plus purchasing and stock holding costs. The screen manufacturer does not have to undertake in-house subassembly and final assembly time on the machine is reduced substantially.

Installation does not require a separate 'clean' bearing assembly area, or in-house heating equipment for fitting bearings into housings. The bespoke bearing assemblies comprise SG iron high-strength housings, integrating CAM-VS vibratory specification bearings, labyrinth and contact seals, to deny the ingress of contaminants, plus bolts and washers. The assemblies are pre-greased and ready to fit, with bearing location features and provision for re-greasing.

The CAM-VS series of spherical roller bearings used in the integrated screen assemblies are designed specifically to provide improved bearing life under severe operating conditions, reducing levels of both vibration and noise by between 50 to 60 per cent. The vibratory specification of the CAM-VS series provides increased fatigue strength against the effects of vibration and shock load conditions. The bearings are manufactured from high cleanliness steel for improved operating life and are equipped with brass cages to combat the effects of vibration, operating fatigue, wear and corrosion.

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