The Timken Company HM803110 Pinion Bearing Cup

Description:

The Timken HM803110 tapered roller bearing cup is a precision single cup (outer ring) designed for use with a matching tapered roller bearing cone to support combined radial and axial loads in heavy-duty industrial rotating equipment. Commonly installed in differential pinion assemblies, industrial gearboxes, conveyors, mining equipment, construction machinery, agricultural equipment, and power transmission systems where reliable bearing performance and long service life are essential. Maintenance teams, OEMs, and system integrators use this pinion bearing cup for equipment repair, bearing replacement, machine rebuilds, and drivetrain retrofits.

Applications:

The Timken HM803110 tapered roller bearing cup is engineered for demanding industrial applications requiring high load capacity, precise shaft alignment, and dependable operation under combined radial and axial loads. It is widely used in industrial gear reducers, differential pinion assemblies, heavy-duty conveyors, mining and aggregate equipment, agricultural machinery, construction equipment, and other power transmission equipment when paired with compatible Timken HM803145, HM803149, or HM803146 tapered roller bearing cones.

Technical Specifications:

• Manufacturer: Timken
• Manufacturer Part Number (MPN): HM803110
• Product Type: Tapered roller bearing cup
• Bearing Type: Single cup (outer ring)
• Series: HM803100
• Design Series: TS (tapered single)
• Outside Diameter (OD): 3.5000 in (88.900 mm)
• Outer Ring Width (C): 0.9063 in (23.020 mm)
• Material: High-grade bearing steel
• Load Type: Combined radial and axial loads
• Maximum Housing Fillet Radius: 0.130 in (3.30 mm)
• Housing Backing Shoulder Diameter (Da): 3.39 in (85.10 mm)
• Housing Backing Shoulder Diameter (Db): 2.91 in (73.91 mm)
• Weight: 1.9 lb (0.8 kg)
• Compatible Cones: Timken HM803145, HM803146, HM803149

Common Replacements:

• Timken HM803145/HM803110 bearing set
• Timken HM803149/HM803110 bearing set
• NTN HM803110 equivalent