Lovejoy 68514436053 Flexible Coupling Hub 3/4 in Bore

Product Description

The LOVEJOY 68514436053 is a flexible coupling hub designed for use in power transmission applications where shaft-to-shaft alignment and vibration dampening are required. Machined from cast iron, this hub accepts a maximum bore diameter of 3/4 inches and includes a 3/16 inches by 3/32 inches keyway for secure shaft engagement. With a 2.046-inch outer diameter and an overall length of 2.38 inches, it is sized for compact drive assemblies. Rated to 7,600 RPM, it is suited for motor-driven equipment across industrial and HVAC mechanical systems. Installation is handled by millwrights, HVAC mechanics, or general industrial technicians.

This flexible coupling hub fits into jaw-type or spider-style flexible coupling assemblies used in pump drives, fan drives, compressor connections, and similar rotating equipment. The cast iron construction provides rigidity and durability in both indoor mechanical rooms and light-duty industrial environments. The keyway configuration ensures positive torque transfer without shaft slippage under load. Coupling Size Code 4J identifies the hub family for matching with compatible coupling elements and elastomeric spiders of the same size class.

Key Features

• Maximum bore diameter of 3/4 inches for standard shaft sizes
• 3/16 inches wide by 3/32 inches deep keyway for positive shaft engagement
• 2.046-inch outer diameter fits Coupling Size Code 4J assemblies
• 2.38-inch overall length suits compact drive configurations
• Cast iron construction for rigidity and wear resistance
• Rated to 7,600 RPM for motor-driven rotating equipment

Compatibility

Designed for use in Coupling Size Code 4J flexible coupling assemblies. Mate with a compatible 4J coupling element and elastomeric spider insert. Consult the full coupling assembly requirements to confirm bore, keyway, and spider durometer match your application.

Installation Notes

De-energize and lock out the drive motor before removing or installing any coupling component. Verify shaft diameter and keyway dimensions against the hub bore and keyway before pressing or fitting the hub. Do not exceed the rated 7,600 RPM operating speed. Proper shaft alignment should be confirmed after installation to prevent premature hub or spider wear.