Timken 3520 Single Row Tapered Roller Bearing Cup

The Timken 3520 single-row tapered roller bearing cup (outer ring) is the outer race in Timken's 3500 Series, designed to be paired with compatible cones such as 3585, 3580, 3582, or 3583 to form a complete tapered roller bearing assembly. It supports combined radial and axial loads while maintaining precise shaft alignment, and its separable cup design simplifies installation, adjustment, and maintenance. Commonly used in automotive wheel hubs, trailers, industrial gearboxes, agricultural equipment, and general power transmission systems, the 3520 delivers high-load performance in demanding applications. Key specifications include an Outside Diameter of 3.3125 in (84.138 mm) and a Cup Width of 0.9375 in (23.813 mm), with through-hardened bearing steel as the race material. The cup features a maximum housing fillet radius of 0.130 in and housing backing shoulder diameters of 3.15 in (frontface) and 2.91 in (backface). It carries a Dynamic Radial Load Rating (C1) of 113,000 N (25,500 lbf) and a Static Radial Load Rating (C0) of 134,000 N (30,100 lbf), with a Dynamic Axial Load Rating (Ca90) of 15,400 N (3,460 lbf); geometry factors include e 0.31, K 1.91, Y 1.96, and Cg 0.0808. Weighing about 0.70 kg (1.5 lb), it serves as the outer ring in the assembly and is designed for long service life in high-demand applications. Compatible replacements include SKF and NTN equivalents, depending on the application.