In a TwinTandem bearing, each of the rows of tapered rollers is replaced by two ball rows. This means that a double-row tapered roller bearing becomes a 4-row ball bearing. Replacing the tapered rollers’ contact line with the balls’ contact points and eliminating rib friction reduces bearing friction by approximately 50%. This wheel bearing thus makes an important contribution toward improving fuel economy and reducing emissions.
The face splines save a significant amount of weight and enable fuel savings and a reduction in CO2 emissions. The system weighs around ten percent less than a conventional bearing. On four wheels in a vehicle, this involves a weight saving of over one kilogram.
The wheel bearing module with axial splines is appealing due to its ease of mounting. The self-centering axial gear teeth are fixed in place on the axial journal by means of the central screw in the assembly. The bearing remains completely clearance-free in the gear teeth during operation. Regardless of whether the vehicle travels 1,000 or 100,000 kilometers, the bearing won’t budge during the entire operating life!
50 % more torque transmission for a significant increase in driving dynamics: The torque transmission with the axial splines is considerably higher compared with radial splines, mainly due to the larger diameter of the pitch circle of the gear teeth.
Our solutions for maintenance-free wheel bearings range from compact bearing units to highly-integrated assemblies that incorporate the wheel carrier. Built-in sensors supply data used for controlling ABS and ESP, as well as for active-chassis settings. The wheel forces can also be measured continuously.
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