The Timken Company 30307 Tapered Roller Bearing

The Timken 30307 tapered roller bearing set is a matched single‑row metric assembly (cone X30307M and cup Y30307M) designed to support combined radial and axial loads while maintaining precise shaft alignment. It features a 35 mm bore, 80 mm outside diameter, and 22.75 mm overall width, with inner and outer ring widths of 21.00 mm and 18.00 mm respectively, a pressed-steel cage, and an approximate weight of 0.5 kg (1.2 lb). The bearing is part of the 30307 Metric Series and offers dynamic radial load ratings of 87,200 N (C1) and 22,600 N (C90), a static radial rating of 86,100 N (C0), and a dynamic axial rating of 12,200 N (Ca90). Its geometry factors include e = 0.31, K = 1.85, Y = 1.90, Cg = 0.0675, and an effective center location of −5.8 mm, with maximum shaft fillet radius of 2.03 mm and maximum housing fillet radius of 1.52 mm. The separable cone-and-cup design simplifies installation, preload adjustment, and maintenance, making it suitable for industrial gearboxes, wheel hubs, conveyors, electric motors, pumps, machine tools, agricultural equipment, and other heavy‑duty rotating machinery.