Combined roller bearings for horizontal and vertical linear motion applications
23 January 2012
Now available from EuroBearings is a range of combined roller bearings that offer a combination of a radial and an axial bearing operating at 90º to each other on a common hub. The radial bearing carries the main load and the axial roller resists “crabbing” or side thrust. Both being cylindrical roller bearings of 'cageless' design, the bearings offer maximum load for size. Originally designed as a roller bearing for fork truck masts, both bearings are hybrid rubber/metal sealed.
These products carry loads from tens of kilos up to hundreds of tonnes in both horizontal and vertical linear motion applications.
To mount the combined roller bearing, a hole the same size as the spigot on the rear of the hub is drilled or milled in a steel member. The hub is then welded into place, filling the 45º weld fillet around the circumference of the spigot with weld. There is no need to disassemble the bearing before welding.
Alternatively the bearing can be supplied welded to a mounting plate. The plate is then attached to the assembly using bolt and nut via through holes or machine screws into threaded holes in the plate.
In use, the combined roller bearing engages in a ‘C’ or ‘H’ profiled steel section. The radial roller engages on the flanges of the profiled section and the axial roller engages on the web of the profiled section. These sections are much thicker and heavier than standard beams or columns. The profile is formed to exactly match the outer profile of the bearing.
With the combination of the radial and axial bearings, it is very unlikely that the radial bearing will crab or lock in its steel section because any twisting action is immediately counteracted by the axial bearing running into and along the web
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