The Timken Company 3578 Tapered Roller Bearing Cone

The Timken 3578 tapered roller bearing cone is a single-row cone from the 3500 Series that pairs with compatible cups such as Timken 3525 or 3526 to form a complete tapered roller bearing assembly. It is engineered to support combined radial and axial loads while maintaining precise shaft alignment, with a separable cone design that simplifies installation, adjustment, and maintenance. Key specifications include: Manufacturer Part Number 3578, Bearing Type single-row tapered roller bearing cone (TS), Series 3500, Compatible Cup Part Numbers 3525 and 3526, Bore Diameter 1.7500 in (44.450 mm), Cone Width 1.2160 in (30.886 mm), Cage Material stamped steel, Dynamic Radial Load Rating (C1) 113,000 N (25,500 lbf), Dynamic Radial Load Rating (C90) 29,400 N (6,610 lbf), Static Radial Load Rating (C0) 134,000 N (30,100 lbf), Dynamic Axial Load Rating (Ca90) 15,400 N (3,460 lbf), e Factor 0.31, K Factor 1.91, Y Factor 1.96 (assembly dependent), Geometry Factor (Cg) 0.0808, Effective Center Location -10.2 mm (-0.40 in), Maximum Shaft Fillet Radius 3.60 mm (0.140 in), Shaft Backing Shoulder Diameter (Frontface) 2.01 in (51 mm) and (Backface) 2.24 in (57 mm), and Weight approximately 0.60 kg (1.3 lb). Functionally, it serves as the inner cone component of a tapered roller bearing assembly that supports both radial and axial loads, making it suitable for wheel bearing assemblies, industrial gearboxes, conveyor systems, machine tools, agricultural machinery, and other heavy-duty rotating equipment. Features include a separable cone design, precision-ground raceways, stamped steel cage, optimized roller geometry, high load capacity, and long service life.