Lovejoy 68514436124 Flexible Coupling Hub Cast Iron

Product Description

The LOVEJOY 68514436124 is a cast iron flexible coupling hub designed for use in mechanical power transmission systems where shaft misalignment compensation and vibration damping are required. This hub accepts a maximum bore diameter of 1-1/4 inches and is machined with a 1/4 inch wide by 1/8 inch deep keyway for secure shaft engagement. With an outer diameter of 4-5/8 inches and an overall length of 3.94 inches, it is sized for medium-duty industrial and commercial drive applications. Licensed mechanical technicians and millwrights typically install this component as part of a complete flexible coupling assembly.

This coupling hub is suited for pumps, fans, compressors, and other rotating equipment found in commercial HVAC systems, industrial process lines, and general mechanical drive setups. It carries a size code of 7S and is rated to a maximum of 5,850 RPM, making it appropriate for moderate-speed drive trains. It is intended to mate with a compatible spider insert and mating hub to form a complete jaw-style flexible coupling. Always verify that the mating hub and spider element share the same coupling size code before installation.

Key Features

• 1-1/4 inch maximum bore diameter with a 1/4 inch x 1/8 inch keyway for positive shaft engagement
• Cast iron construction for durability in industrial and commercial drive environments
• 4-5/8 inch outer diameter and 3.94 inch overall length for medium-duty shaft coupling assemblies
• Rated to 5,850 RPM maximum operating speed
• Coupling size code 7S for straightforward matching with compatible mating hubs and spider elements

Compatibility

Designed as an OEM-style replacement or direct-install jaw-style flexible coupling hub for mechanical drive assemblies using coupling size code 7S components. Confirm bore size, keyway dimensions, and coupling size code against the existing assembly before ordering.

Installation Notes

Installation is typically performed by a licensed millwright or mechanical technician. Disconnect and lock out all power to the drive system before handling any rotating components. Ensure the shaft and bore are clean and free of burrs before pressing or sliding the hub into position, and confirm keyway alignment before final seating. Do not exceed the rated maximum RPM, and always install a compatible spider insert between mating hubs before returning the drive to service.