Timken 44348 Tapered Roller Bearing Cup Outer Race

The Timken 44348 is a single-cup tapered roller bearing outer race designed for use with Timken tapered roller bearing cones in heavy-duty industrial, automotive, and power transmission applications. As the outer race of a single-row bearing, it provides high radial and axial load capacity, precise shaft alignment, and long service life. Manufactured from high-carbon chromium bearing steel, it is part of Timken's 44000 series with a standard single-cup design. Key dimensions include an outside diameter of 3.4843 in (88.501 mm) and a cup width of 0.6875 in (17.463 mm), with a maximum housing fillet radius of 0.060 in (1.52 mm). Housing backing shoulder diameters Da 3.340 in (84.10 mm) and Db 2.950 in (74.93 mm), and a weight of 1.5 lb (0.70 kg). Cup part number 44348; Bearing type: single cup (TS); Compatible cone: Timken 44131. Common applications include gearboxes, transmissions, axles, agricultural equipment, construction machinery, mining equipment, and industrial power transmission systems. Common replacements include SKF 44348, NTN 44348, and Koyo 44348.