From the technical, economic and pure design point of views, split roller bearings offer a host of advantages compared to solid types. Basically, the simplicity of fitting a split roller bearing, compared to a solid bearing, is a major factor in its longevity. Unlike solid bearings, SRB split roller bearings are totally split to the shaft, a design that both simplifies and expedites installation and cuts installation downtime by up to 90%. SRB split roller bearings can be removed and replaced by simply supporting the shaft.
There is no need to lift the shaft, or obtain access to the shaft ends, therefore expensive and awkward to handle lifting equipment is not required. This feature is extremely valuable for all applications, and especially regarding large machines, where sheer size and weight is a barrier to fast and cost effective servicing.
In addition, SRB split roller bearings can have a longer life span compared to conventional solid bearings, because they cannot be cross- located.
In addition to their overall cost advantages, another major reason for replacing solid housed bearings with SRB split roller bearings is their effective sealing systems, where they have inherent advantages compared to conventional solid housed bearing seals. With the SRB split roller bearing design, the spherical location between the cartridge housing and the pedestal support ensures that under conditions of shaft misalignment, irrespective of whatever type of seal is specified, it will always remain concentric to the shaft. As a result, SRB split roller bearings can out-perform solid bearings in harsh operating conditions (in some cases operating underwater) even with shaft misalignment, where solid roller bearings can suffer from non-concentric ineffective seals that will rapidly lead to expensive premature bearing failure.
Revolvo has developed special labyrinth seals to exclude fine, abrasive & hygroscopic dust encountered in industries such as cement & coal, and these specialist sealing solutions are proving to be far more effective in stopping coal dust contamination, providing much improved bearing reliability, longer life, and greatly reduced levels of maintenance.
One solution developed by Revolvo, for screw conveyors moving fine particulates, incorporates split steel labyrinth collars which are clamped onto the coupling journal between the flights of the screw conveyor. These collars then engage with the labyrinth profile machined into the bearing housing. Further modifications to the collars also prevent the build up of dust & particulates in the area around the seal. Following successful trails, this solution has been adopted widely by many industries, leading to a vastly improved bearing life and a large reduction in downtime.
So, despite an initial higher purchase price compared to a conventional solid housed bearing, SRB split roller bearings can be far more cost effective, in terms of whole life costs, once the costs for labour to replace failed bearings, and production losses are taken into account.
For further information on this product, please contact your local ERIKS service centre on 0845 006 6000 or click here to find your local service centre.