Timken 378-A Bearing Cone

Description:

The Timken 378-A bearing cone is a single-row tapered roller bearing cone used in tapered roller bearing assemblies for heavy-duty rotating equipment and industrial power transmission systems. Commonly installed in industrial gearboxes, conveyor systems, mining equipment, construction machinery, agricultural equipment, and heavy-duty axle assemblies where combined radial and axial loads require reliable bearing support. Maintenance teams, OEMs, and system integrators use this bearing cone for equipment repair, bearing replacement, and drivetrain retrofits to maintain dependable machine performance and extended service life.

Applications:

The Timken 378-A bearing cone is designed for industrial applications requiring precise shaft alignment and high load-carrying capacity under combined radial and thrust loads. It is widely used in industrial gearboxes, conveyor drives, mining machinery, construction equipment, agricultural machinery, and material handling systems where durable tapered roller bearing performance is essential.

Technical Specifications:

• Manufacturer Part Number (MPN): 378-A
• Manufacturer: Timken
• Product Type: Tapered roller bearing cone
• Bearing Type: Single-row tapered roller bearing cone
• Bearing Series: 3700
• Bore Diameter: 1.5000 in (38.100 mm)
• Inner Ring Width (B): 1.1930 in (30.302 mm)
• Dynamic Radial Load Rating (C1): 27,500 lbf (122,000 N)
• Dynamic Radial Load Rating (C90): 7,120 lbf (31,700 N)
• Static Radial Load Rating (C0): 34,300 lbf (153,000 N)
• Dynamic Thrust Load Rating (Ca90): 4,120 lbf (18,300 N)
• Maximum Shaft Fillet Radius: 0.140 in (3.600 mm)
• Cage Material: Stamped steel
• Weight: 3.90 lb (1.77 kg)
• Compatible Cup: Timken 3720, 3725, 3726, 3730, 3732, 3733

Common Replacements:

• SKF 378-A
• NTN 378-A
• KOYO 378-A