Posted to News on 14th Apr 2008, 14:22
Tapered roller bearings boast higher load capacity
Developed primarily for lifting gear, conveying systems, hydraulic pumps, vehicle transmission systems, static gearboxes, wheel bearing arrangements and similar applications, Schaeffler's new premium-grade X-life single-row FAG T7FC tapered roller bearings offer higher performance with unchanged dimensions. The basic dynamic load rating of the bearings have been increased by up to 20 per cent and the basic rating life by up to 70 per cent.
For some applications, where loads are unchanged, customers can use smaller and therefore more cost-effective bearings, resulting in more compact products that benefit form extremely reliable bearings.
The new X-life T7FC single-row tapered roller bearings use through-hardened premium material (rather than case-hardened), which gives higher resistance to solid particles. In addition, Schaeffler has modified the logarithmic profile of the raceways and the outside surface of the rollers, which compensates for stress peaks under high loads and any possible misalignment.
Due to the optimised surfaces, an elasto-hydrodynamic lubricant film builds up even at very low speeds. This enables higher loads on the bearing immediately after start up. In addition, significantly reduced dimensional and running tolerances ensure optimum load distribution. Therefore stress peaks are avoided and material loading is reduced.
Higher dimensional and running accuracies, in combination with improved surface topography, reduce friction and heat considerably. The improved contact geometry of the inner ring ribs and roller end faces also reduces friction, resulting in less strain on the lubricant inside the bearing. This means maintenance intervals can be extended. The bearings run significantly quieter than conventional bearings.
Schaeffler's X-life single-row tapered roller bearings offer high radial and axial load carrying capacity, high rigidity and ease of fitting. The bearings comprise solid inner and outer rings with tapered raceways and tapered rollers, with cages made from pressed sheet steel. The inner ring, together with the cage and rollers, can be fitted separately from the outer ring.
Bore diameters for the X-life bearings are available from 45-95mm and the bearings can be used at operating temperatures between -30 up to 120degC.
For more information on Schaeffler's X-life single-row FAG T7FC tapered roller bearings, visit www.schaeffler.co.uk.
