Precision Parts HM88649 Tapered Roller Bearing Cone Bearings & Seals

The Precision Parts HM88649 is a single-cone tapered roller bearing designed for high-load, moderate-speed applications across automotive, agricultural, industrial, and powersports drivetrain systems. This is the cone (inner ring) component of a separable tapered roller bearing assembly, engineered to pair with a compatible cup such as the HM88610 or HM88611.

The HM88649 features a 1.3750" bore diameter and 1.000" cone width, with an outer diameter of approximately 2.8438". Its tapered geometry allows it to efficiently handle both radial and axial (thrust) loads simultaneously, making it well-suited for differential pinion, axle, and wheel bearing applications.

Key Features:

• Bore Diameter: 1.3750 in (34.925 mm)
• Outer Diameter: 2.8438 in (72.233 mm)
• Cone Width: 1.000 in (25.4 mm)
• Material: Chrome steel construction for durability and wear resistance
• Series: HM88000 Series
• ABMA Precision Rating: Class 2 (Pinion) Tolerance
• Operating Temperature Range: -65°F to +250°F
• Compatible Cups: HM88610, HM88611, HM88611AS
• Handles combined radial and thrust loads with tapered roller geometry
• Sold individually — cone only (cup sold separately)

The HM88649 is a widely cross-referenced bearing number used by multiple manufacturers including Timken, National, Koyo, NTN, and others. It is a direct-fit replacement for OEM and aftermarket applications in differentials, pinion assemblies, trailer axles, and light industrial equipment.