Lovejoy 69790400099 Rigid Coupling Hub 2.375in Bore

Product Description

The LOVEJOY 69790400099 is a rigid coupling hub designed for direct shaft-to-shaft power transmission in mechanical drive systems. With a 2.375-inch inside bore and a 5.5-inch outside diameter, this hub is built for high-torque applications where zero backlash and solid mechanical alignment are required. Machined from carbon steel, it provides the strength and durability demanded in industrial and commercial drive train assemblies. A 0.625-inch wide by 0.3125-inch deep keyway is cut into the bore, securing the hub to a keyed shaft and preventing rotational slip under load. Licensed millwrights, maintenance mechanics, and industrial technicians are the typical installers.

This rigid coupling hub is suited for fixed-speed shaft coupling applications in industrial machinery, pumping systems, compressor drives, and commercial HVAC equipment where shaft misalignment is not present or has been corrected prior to assembly. The keyway configuration is compatible with standard inch-series keyed shafts. It is sold as a single hub unit, intended to be paired with a corresponding mating hub and coupling element appropriate to the drive system design.

Key Features

• 2.375-inch inside bore accommodates standard inch-series keyed shafts
• 5.5-inch outside diameter for robust torque transmission capacity
• Carbon steel construction provides high tensile strength and wear resistance
• Integral keyway — 0.625 inches wide by 0.3125 inches deep — prevents rotational slip on keyed shafts
• Rigid design eliminates backlash and maintains precise shaft alignment
• Single-unit packaging allows replacement or custom coupling assembly builds

Compatibility

Designed as an OEM-style replacement or new-installation rigid coupling hub for standard inch-series keyed shaft applications in industrial and commercial mechanical drive systems.

Installation Notes

Installation is typically performed by a licensed millwright or qualified maintenance mechanic. Always de-energize and lock out the drive system before removing or installing any coupling component, following OSHA lockout/tagout procedures. The shaft and bore should be cleaned and inspected for burrs before assembly; a proper hub installation tool or hydraulic press is recommended to avoid damage to the bore or shaft. Verify shaft alignment to manufacturer tolerances before final assembly, as rigid couplings do not compensate for angular or parallel misalignment.