The Timken Company 99550 Tapered Roller Bearing Cone

Description:

The Timken 99550 is a single tapered roller bearing cone with a 5.500-inch bore, engineered to support combined radial and axial loads in heavy-duty industrial applications. As the inner ring assembly of a tapered roller bearing, it is designed to be paired with a compatible bearing cup—most commonly the Timken 99100—to provide accurate shaft positioning, high load capacity, and extended service life under demanding operating conditions. The 99550 cone is widely used in mining equipment, rolling mills, industrial gearboxes, heavy conveyors, steel processing equipment, and other large rotating machinery. Maintenance teams, OEMs, and system integrators rely on this bearing for equipment replacement, retrofit, expansion, and preventive maintenance to maximize uptime and reduce maintenance costs.

Applications:

The Timken 99550 tapered roller bearing cone is designed for heavy-duty applications where high radial and thrust loads are encountered simultaneously. When matched with the Timken 99100 bearing cup, it delivers precise shaft alignment, low friction, and dependable performance in industrial power transmission systems. Typical applications include rolling mills, mining equipment, crushers, paper mills, marine propulsion systems, heavy conveyors, industrial gearboxes, and other high-capacity rotating equipment.

Technical Specifications:

• Manufacturer Part Number (MPN): 99550
• Manufacturer: Timken
• Product Type: Tapered Roller Bearing Cone
• Bearing Type: Single Cone (TS – Tapered Single)
• Series: 99000 Series
• Design Units: Inch (Imperial)
• Bore Diameter (d): 5.5000 in (139.700 mm)
• Inner Ring Width (B): 2.6250 in (66.675 mm)
• Dynamic Radial Load Rating (C1): 148,000 lbf (660,000 N)
• Dynamic Radial Load Rating (C90): 38,500 lbf (171,000 N)
• Dynamic Axial Load Rating (Ca90): 26,800 lbf (119,000 N)
• Static Radial Load Rating (C0): 231,000 lbf (1,030,000 N)
• K Factor: 1.43
• G1 Factor: 555.5
• G2 Factor: 73.5
• Geometry Factor (Cg): 0.146
• Effective Center Location: -0.48 in (-12.2 mm)
• Maximum Shaft Fillet Radius: 0.280 in (7.10 mm)
• Weight: 66.21 lb (30.031 kg)
• Compatible Cup: Timken 99100
• Typical Applications: Rolling mills, mining equipment, crushers, heavy industrial gearboxes, conveyors, steel processing equipment, and industrial power transmission machinery.

Common Replacements:

• Timken 99550/99100 Bearing Set
• NTN Equivalent Tapered Roller Bearing Cone
• SKF Equivalent Tapered Roller Bearing Cone