Lovejoy 69790400098 Rigid Coupling Hub 2.25in Bore

Product Description

The LOVEJOY 69790400098 is a rigid coupling hub designed for direct shaft connections in industrial power transmission applications. It features a 2.25-inch inside bore and a 5.5-inch outside diameter, machined from carbon steel for strength and durability. The hub includes a keyway measuring 0.5 inches wide by 0.25 inches deep, allowing positive torque transfer to a keyed shaft. Rigid coupling hubs like this are installed by industrial mechanics and millwrights in pump, conveyor, compressor, and general rotating equipment assemblies where shaft misalignment is controlled at installation.

This hub is suited for use in commercial and industrial machinery where a solid, non-flexible shaft connection is required. It is typically paired with a mating hub and a rigid sleeve or disc element to form a complete rigid coupling assembly. Applications include pump-to-motor drives, gearbox connections, and other direct-drive configurations where shaft alignment is held within tight tolerances. The carbon steel construction handles moderate to high torque loads in both indoor and protected outdoor environments.

Key Features

• 2.25-inch inside bore for compatibility with standard shaft sizes
• 5.5-inch outside diameter providing a robust hub face
• Keyway slot (0.5 inches wide x 0.25 inches deep) for positive shaft engagement
• Carbon steel construction for high-strength torque transmission
• Rigid design maintains precise shaft alignment under load

Compatibility

Designed as an OEM-style rigid coupling hub for industrial power transmission assemblies requiring a 2.25-inch bore with a standard keyway configuration.

Installation Notes

Installation should be performed by a qualified millwright or industrial mechanic with equipment de-energized and locked out per OSHA lockout/tagout procedures. Shaft and bore surfaces should be clean and free of burrs before pressing or fitting the hub. Ensure shaft alignment is within the coupling manufacturer's specified tolerance before final assembly, as rigid couplings do not accommodate misalignment. Common installation tools include a hydraulic press or hub puller, feeler gauges, and a dial indicator for shaft alignment verification.