Timken 748S-742 Tapered Roller Bearing Assembly

Description:

The Timken 748S-742 complete bearing assembly is a TS (Tapered Single) tapered roller bearing consisting of the Timken 748S cone and Timken 742 cup. Engineered to accommodate heavy combined radial and axial loads, this bearing assembly provides excellent load distribution, precise shaft alignment, and long operating life in demanding industrial environments. It is commonly installed in industrial gearboxes, heavy-duty trailers, mining equipment, construction machinery, conveyors, and power transmission systems. Maintenance teams, OEMs, and system integrators rely on this bearing assembly for equipment repairs, replacement of worn bearings, retrofit projects, and preventive maintenance to maximize equipment reliability and minimize downtime.

Applications:

The Timken 748S-742 tapered roller bearing assembly is designed for applications requiring high load capacity, low friction, and dependable performance under continuous radial and thrust loading. It is widely used in industrial drives, mining machinery, heavy-duty axles, material handling equipment, agricultural machinery, and other rotating equipment where accurate shaft positioning and extended bearing life are critical.

Technical Specifications:

• Manufacturer Part Number (MPN): 748S-742
• Manufacturer: Timken
• Product Type: Complete Bearing Assembly
• Bearing Type: TS (Tapered Single) Tapered Roller Bearing
• Cone Part Number: 748S
• Cup Part Number: 742
• Series: 745 Series
• Design Units: Inch (Imperial)
• Material: Through-Hardened Chrome Steel
• Bore Diameter (d): 3.0000 in (76.200 mm)
• Outside Diameter (D): 5.9090 in (150.089 mm)
• Overall Bearing Width (T): 1.7500 in (44.450 mm)
• Cone Width (B): 1.8375 in (46.673 mm)
• Cup Width (C): 1.4375 in (36.513 mm)
• Dynamic Radial Load Rating (C1): 84,700 lbf (377,000 N)
• Dynamic Radial Load Rating (C90): 21,900 lbf (97,600 N)
• Static Radial Load Rating (C0): 93,800 lbf (417,000 N)
• Dynamic Axial Load Rating (Ca90): 12,200 lbf (54,400 N)
• Maximum Shaft Fillet Radius: 0.140 in (3.600 mm)
• Maximum Housing Fillet Radius: 0.130 in (3.300 mm)
• Shaft Backing Shoulder Diameter – Frontface (da): 3.43 in (87.00 mm)
• Shaft Backing Shoulder Diameter – Backface (db): 3.66 in (93.00 mm)
• Housing Backing Shoulder Diameter – Frontface (Da): 5.63 in (142.00 mm)
• Housing Backing Shoulder Diameter – Backface (Db): 5.28 in (134.11 mm)
• K Factor: 1.80
• e Factor: 0.33
• Y Factor: 1.84
• Geometry Factor (Cg): 0.0898
• Weight: 8.1 lb (3.7 kg)
• Typical Applications: Industrial gearboxes, mining equipment, heavy-duty trailers, construction machinery, conveyors, agricultural equipment, and power transmission systems.

Common Replacements:

• SKF 748S/742
• NTN 748S/742
• KOYO 748S/742