Lovejoy 68514441331 Flexible Coupling Hub 28mm Bore

Product Description

The LOVEJOY 68514441331 is a flexible coupling hub designed for use in mechanical power transmission applications. This hub accepts a maximum bore of 28mm and features an 8mm wide by 3.3mm deep keyway for positive shaft engagement. With a 2.54-inch outer diameter and a 3.5-inch overall length, the hub is constructed from sintered iron for durability under rotational load. It is rated to 7000 RPM and carries a coupling size code of L100. Two hubs and one spider insert are required to complete a full flexible coupling assembly.

This coupling hub is suited for industrial and commercial mechanical drive systems where shaft-to-shaft flexibility and vibration dampening are required. Typical applications include pump drives, compressor connections, conveyor systems, and general-purpose equipment found in HVAC mechanical rooms, light industrial facilities, and process equipment installations. The sintered iron construction makes it appropriate for moderate-load, high-speed rotating shaft connections where a keyed bore is specified.

Key Features

• 28mm maximum bore with 8mm x 3.3mm keyway for secure shaft fit
• 2.54-inch outer diameter and 3.5-inch overall length
• Rated to 7000 RPM for high-speed drive applications
• Sintered iron construction for wear resistance and dimensional stability
• Coupling size code L100 for straightforward replacement sourcing
• Sold individually — order two hubs and one spider for a complete coupling assembly

Compatibility

Designed as an OEM-style replacement flexible coupling hub for mechanical power transmission assemblies using L100 series jaw-type flexible couplings requiring a 28mm bore with an 8mm keyway.

Installation Notes

Installation should be performed by a qualified millwright or mechanical technician. Always de-energize and lock out the drive system before removing or installing coupling components. Ensure shaft and bore surfaces are clean and free of burrs before pressing or sliding the hub into position. Verify alignment of coupled shafts after assembly to minimize vibration and extend spider insert service life.