Timken 450350 Oil Seal

The Timken 450350 oil seal is a small bore inch shaft seal designed to retain lubricants and prevent dirt, moisture, and other contaminants from entering rotating shaft systems. Manufactured by Timken and sold under the National brand in the 450000 series, this Type 45, single-lip-with-spring seal uses nitrile (NBR) material for reliable sealing in demanding environments. It features a shaft diameter of 2.375 in (60.325 mm), housing bore of 3.371 in (85.623 mm), outside diameter of 3.376 in (85.750 mm), and overall width of 0.468 in (11.887 mm) with a solid construction and an inner case. It supports continuous operation up to 225°F (107°C) and a maximum shaft surface speed of 3000 ft/min, with misalignment tolerance of 0.015 in at 800 rpm and 0.010 in at 4200 rpm. Typical applications include industrial gearboxes, pumps, electric motors, and power transmission equipment, as well as conveyors, construction equipment, mining machinery, and heavy-duty vehicle drivetrains where reliable lubricant containment is essential. Common replacements include SKF and CR (Chicago Rawhide) equivalents, and National Type 45 oil seals, making the Timken 450350 suitable for equipment replacement, rebuilds, retrofits, and preventive maintenance to extend component service life.