Timken 34300DE Ball Bearing Insert

The Timken 34300DE is a double-row tapered roller bearing cone designed to pair with compatible Timken double cups to form a complete TDO (Tapered Double Outer) bearing assembly, delivering high load capacity and rigidity for heavy-duty power transmission. It features a 3.000-inch bore and a 4.500-inch overall cone width, and is built with through-hardened bearing steel and a stamped steel cage to provide long service life in demanding environments. When paired with Timken double cup model 34478D, it forms a complete TDO bearing suitable for gear drives, conveyors, mining machinery, rolling mills, construction equipment, and other rotating equipment subjected to high radial and thrust loads. Its dynamic radial load rating (C1, two-row) is 178,000 N (40,000 lbf), with a C90 rating of 26,500 N (5,960 lbf) and a static radial load rating (C0) of 136,000 N (30,600 lbf). Other technical details include a 0.060 in (1.50 mm) effective center location, a shaft backing shoulder diameter of 3.39 in (86.0 mm), a weight around 9.5 lb (4.3 kg), a maximum shaft fillet radius of 0.030 in (0.80 mm), double-row cone construction, separable design, precision-ground raceways, and a stamped steel cage.