Four-Row Tapered Roller Bearings TQOW 2TDIW are used in some of the most critical applications known to industry.They address operating conditions with both radial and axial loads.The degree of safety demanded in the transportation industry surpasses all other standards. The importance of having the bearings perform is imperative to the safety of others. Regardless of whether the application is rail, truck or aircraft Tyson Roller bearings are designed to meet or exceed the expectations of its users.