Timken 742-B Tapered Roller Bearing Cup Outer Race

Description:

The Timken 742-B tapered roller bearing cup is a precision flanged outer race designed for single row tapered roller bearing assemblies that support combined radial and axial loads in heavy-duty rotating equipment. Commonly installed in industrial gearboxes, mining equipment, construction machinery, heavy-duty trailers, and power transmission systems where accurate bearing alignment and secure axial positioning are required. Maintenance teams, OEMs, and system integrators use this flanged bearing cup for equipment repairs, bearing replacements, retrofit projects, and preventive maintenance to maximize bearing performance and service life.

Applications:

The Timken 742-B tapered roller bearing cup is engineered for use with compatible Timken tapered roller bearing cones in TSF (tapered single with flange) bearing assemblies. Its flanged design provides positive axial location and accurate seal alignment, making it suitable for industrial drives, heavy-duty axles, mining machinery, conveyors, construction equipment, and other rotating machinery requiring dependable load distribution and extended bearing life.

Technical Specifications:

• Manufacturer Part Number (MPN): 742-B
• Manufacturer: Timken
• Product Type: Tapered Roller Bearing Cup
• Bearing Type: Single Flanged Tapered Roller Bearing Cup (TSF)
• Cup Part Number: 742-B
• Series: 745 Series
• Design Units: Inch (Imperial)
• Material: Through-Hardened Chrome Steel
• Outside Diameter (OD): 5.9090 in (150.089 mm)
• Flange Outside Diameter (D1): 6.2170 in (157.912 mm)
• Cup Width (C): 1.4375 in (36.513 mm)
• Flange Width (C1): 0.3125 in (7.938 mm)
• Maximum Housing Fillet Radius: 0.130 in (3.300 mm)
• Housing Backing Shoulder Diameter – Frontface (Da): 5.64 in (143.260 mm)
• K Factor: 1.80
• e Factor: 0.33
• Y Factor: 1.84
• Geometry Factor (Cg): 0.0898
• Weight: 7.10 lb (3.20 kg)
• Compatible Bearing Cones: Timken 745A, 749
• Typical Applications: Industrial gearboxes, mining equipment, construction machinery, heavy-duty trailers, power transmission systems

Common Replacements:

• SKF 742-B
• NTN 742-B
• KOYO 742-B