TIMKEN 28521B BEARING TAPER

Description:

The Timken 28521B tapered roller bearing cup is a single-row flanged tapered roller bearing cup (outer race) designed for use with a compatible Timken tapered roller bearing cone to support combined radial and axial loads. Its flanged cup design provides positive axial location and improved seal alignment in through-bored housings. It is commonly used in industrial gearboxes, conveyor systems, mining equipment, agricultural machinery, wheel hubs, and heavy-duty power transmission equipment.

Applications:

The Timken 28521B tapered roller bearing cup is engineered to operate with matching Timken tapered roller bearing cones, providing accurate shaft alignment, reduced friction, and high load capacity. The flanged cup design improves bearing positioning and seal retention, making it suitable for industrial gearboxes, conveyor drives, machine tools, axle assemblies, mining equipment, agricultural machinery, and material handling systems operating under demanding conditions.

Technical Specifications:

• Manufacturer Part Number (MPN): 28521B
• Manufacturer: Timken
• Product Type: Tapered roller bearing cup (outer race)
• Bearing Type: Single-row flanged tapered roller bearing cup (TSF)
• Series: 28500
• Component: Outer ring (cup)
• Outside Diameter (OD): 3.6250 in (92.075 mm)
• Outer Flange Diameter (D1): 3.7772 in (95.941 mm)
• Cup Width (C): 0.7813 in (19.845 mm)
• Cup Flange Width (C1): 0.1562 in (3.967 mm)
• Cage Material (matching assembly): Stamped steel
• Maximum Housing Fillet Radius: 0.030 in (0.80 mm)
• Housing Frontface Backing Diameter (Da): 3.54 in (89.90 mm)
• Weight: 1.5 lb (0.7 kg)
• Compatible Cone: Timken 28584 (assembly 28584-28521B)
• Function: Supports combined radial and axial loads when paired with a compatible Timken tapered roller bearing cone.
• Features: Flanged cup design for positive axial location, precision-ground raceway, separable construction, high load capacity, and suitability for heavy-duty industrial applications.

Common Replacements:

• Timken 28521B tapered roller bearing cup
• SKF 28521B tapered roller bearing cup
• NTN 28521B tapered roller bearing cup