Double direction angular contact thrust ball bearings
Double direction angular contact thrust ball bearings were developed by SKF to axially locate spindles in both directions. These bearings are intended for mounting in combination with cylindrical roller bearings in the NN 30 K or N 10 K series in the same housing bore. This bearing combination simplifies machining of the housing bore.
Double direction angular contact thrust ball bearings are manufactured with the same bore size and nominal outside diameter as corresponding cylindrical roller bearings. However, the tolerance of the housing washer outside diameter, combined with the recommended housing fit, refer to the section "Recommended shaft and housing fits", results in an appropriate radial clearance in the housing bore. This clearance prevents radial loads from acting on the thrust bearing.
SKF manufactures double direction angular contact ball bearings to three different designs:
– basic design, 2344(00) series
– high-speed design, BTM series
– hybrid design