Timken 34300DAA Bearing

Description:

The Timken 34300DAA is a double-row tapered roller bearing cone designed for use with compatible Timken double cups to form a complete TDO (Tapered Double Outer) bearing assembly. The "DAA" suffix identifies a Timken factory configuration of the double cone and does not change the bearing's principal dimensions. Engineered to support heavy combined radial and axial loads in both directions, this bearing provides exceptional rigidity, precise shaft alignment, and long service life in demanding industrial applications. It is commonly used in rolling mills, mining equipment, industrial gearboxes, steel processing machinery, paper mills, and heavy-duty power transmission systems.

Applications:

The Timken 34300DAA double tapered roller bearing cone is designed for severe-duty applications requiring high load capacity, excellent shaft stability, and resistance to overturning moments. When paired with a compatible Timken double cup such as the 34478D, it forms a complete TDO bearing assembly suitable for industrial gearboxes, conveyors, mining machinery, construction equipment, rolling mills, and other heavy rotating equipment.

Technical Specifications:

• Manufacturer Part Number (MPN): 34300DAA
• Manufacturer: Timken
• Product Type: Double tapered roller bearing cone
• Bearing Type: Double-row tapered roller bearing cone (TDO component)
• Series: 34000 Series
• Bore Diameter (ID): 3.000 in (76.200 mm)
• Overall Cone Width (B): 4.500 in (114.300 mm)
• Number of Rows: Double
• Compatible Double Cup Part Number: 34478D
• Design Units: Inch
• Cage Material: Stamped steel
• Bearing Material: Through-hardened bearing steel
• Maximum Shaft Fillet Radius: 0.080 in (2.00 mm)
• Dynamic Radial Load Rating (C1, Two-Row): 178,000 N (40,000 lbf)
• Dynamic Radial Load Rating (C90, Two-Row): 46,100 N (10,400 lbf)
• Dynamic Radial Load Rating (C90, One-Row): 26,500 N (5,960 lbf)
• Static Radial Load Rating (C0): 136,000 N (30,600 lbf)
• Dynamic Axial Load Rating (Ca90): 20,500 N (4,600 lbf)
• e Factor: 0.45
• K Factor: 1.30
• Geometry Factor (Cg): 0.109
• Effective Center Location: 0.060 in (1.50 mm)
• Shaft Backing Shoulder Diameter (db): 3.39 in (86.0 mm)
• Weight: Approximately 9.5 lb (4.3 kg)
• Function: Serves as the inner double-cone component of a TDO tapered roller bearing assembly for supporting heavy combined radial and axial loads in both directions.
• Features: Double-row cone construction, separable design, precision-ground raceways, stamped steel cage, optimized roller geometry, high rigidity, high load capacity, and long service life.

Common Replacements:

• Timken 34300DAA double tapered roller bearing cone
• SKF equivalent double tapered roller bearing cone (application dependent)
• NTN equivalent double tapered roller bearing cone