Precision Parts HM89249 Tapered Roller Bearing Cone Bore Bearings & Seals - 1.4375

The Precision Parts HM89249 is a single tapered roller bearing cone designed to handle both radial and axial loads in a wide range of automotive and industrial applications. The tapered geometry allows for efficient combined load management, delivering smooth operation with minimal friction across demanding duty cycles.

This cone (inner ring assembly) is the separable inner component of a tapered roller bearing set, designed to pair with a corresponding cup (outer ring, HM89210) to form a complete bearing assembly. It is typically mounted in opposing pairs on a shaft for optimal load distribution and alignment.

Key Specifications:

• Bore Diameter: 1.4375 in (36.51 mm)
• Cone Width: 1.135 in (28.83 mm)
• Outside Diameter: 2.3650 in (60.07 mm)
• Max Shaft Fillet Radius: 0.14 in (3.6 mm)
• Material: Case carburized steel
• Mating Cup: HM89210

Key Features:

• Tapered roller design efficiently manages combined radial and axial loads
• Precision machined to tight tolerances for reliable fit and performance
• Case carburized steel construction for enhanced surface hardness and core toughness
• Designed to pair with matching cup for optimized contact and load distribution
• Sold individually

The HM89249 bearing cone is a widely used industry-standard part number cross-referenced across major bearing manufacturers including Timken, NTN, National, and others. Common applications include automotive differentials, pinion shafts, wheel hubs, transmissions, trailer axles, and light industrial machinery.