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FAG Double Direction Angular Contact Thrust Ball Bearings
For optimum performance, machine tool spindle bearings must exhibit high rigidity as well as high precision, allowing only slight deflection under load. Double direction angular contact thrust ball bearings achieve a very high level of rigidity through their internal design and preload. Double direction angular contact thrust ball bearings series 2344-2347 should be used in combination with cylindrical roller bearings because they carry only thrust loads. Use of a cylindrical roller bearing in combination with a double row cylindrical roller bearing offers the advantage of supporting both axial and radial forces separately. Double direction angular contact thrust ball bearings with 60° contact angle are well suited for applications requiring high axial stiffness. They are manufactured to precision tolerances, and match the mounting dimensions of the NN30 Series double row cylindrical roller bearings. They feature a solid one piece brass cage which is ball guided. Double direction angular contact thrust ball bearings can be lubricated with either grease or oil. The outer ring O.D. has a lubricating groove in the center with lubricating holes. The application of the lubricant between the two rows of balls allows optimal distribution of lubricant to both raceways. 
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