Timken K38958 Tapered Roller Bearing Cup Outer Ring

The Timken K38958 tapered roller bearing cup (outer ring) is a precision single-cup component designed to pair with the Timken NA12581SW cone to form the NA12581SW/K38958 tapered roller bearing set that supports combined radial and axial loads. This cup is used with the NA12581SW cone in heavy-duty industrial equipment such as gearboxes, conveyors, mining and aggregate equipment, construction machinery, agricultural equipment, and power transmission systems to maintain accurate shaft positioning and efficient load distribution, with bore diameter 31.750 mm (1.2500 in), outside diameter 72.238 mm (2.8440 in), cup width 25.400 mm (1.0000 in), cone width 33.338 mm (1.3125 in), and weight 1.41 kg (3.12 lb); material is high-grade bearing steel and the cage type is stamped steel. The set is compatible with Timken NA12581SW/K38958 and is widely used in repair, replacement, machine rebuilds, and retrofits where reliable operation under combined loads is required.