Timken 44348B Tapered Roller Bearing Cup

The Timken 44348B is a single-flanged tapered roller bearing cup engineered to mate with Timken cones, notably the 44162, in heavy‑duty gearboxes, transmissions, axles, and other power‑transmission assemblies. Its flanged cup design provides precise axial positioning and simplifies seal alignment in through‑bored housings, helping to maintain shaft alignment under heavy radial and axial loads, while the unit is manufactured from high‑carbon chromium bearing steel for long service life. Key specifications for the 44348B include outside diameter 3.4843 in (88.501 mm), outer ring width 0.6875 in (17.463 mm), outer ring flange diameter 3.6983 in (93.937 mm), outer ring flange width 0.2187 in (5.555 mm), maximum housing fillet radius 0.060 in (1.500 mm), housing backing shoulder diameter 3.400 in (86.110 mm), and weight 1.8 lb (0.80 kg); bearing material is high-carbon chromium bearing steel; series 44000 and cup design is single flanged, bearing type TSF. Designed to pair with compatible Timken tapered roller bearing cones, including the 44162, it lists common replacements as Timken 44348, NTN 44348B, and SKF 44348B.