Taking a bearing on vibratory screens

The series of spherical roller bearings used are designed specifically to provide improved bearing life under severe operating conditions, and can reduce levels of both vibration and noise by 50–60%.

NSK’s new integrated bearing assembly units have been designed specifically for manufacturers and repairers of vibrating screens. The screen units are 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 brings the security of a single source supply.

The screen units help to improve the competitiveness of screen manufacturers in a number of key ways. First, all of the design work and unit assembly is undertaken by NSK, reducing in-house design, and purchasing and stockholding costs. Second, the screen manufacturer does not have to undertake in-house sub-assembly, and final assembly time on the machine is reduced substantially. Third, 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. The assemblies are pre-greased and ready to fit, with bearing location features and provision for re-greasing. The series of spherical roller bearings used are designed specifically to provide improved bearing life under severe operating conditions, and can reduce levels of both vibration and noise by 50–60%.