Lovejoy 68514410773 Flexible Coupling Hub 3/4 Inch Bore

Product Description

The LOVEJOY 68514410773 is a flexible coupling hub designed for use in mechanical power transmission systems where shaft misalignment, vibration dampening, and torque transfer are required. Machined to accept a maximum bore diameter of 3/4 inches with a keyway measuring 3/16 inches wide by 3/32 inches deep, this hub provides a secure, keyed connection to the drive or driven shaft. The hub measures 2.11 inches in outer diameter and 2.12 inches in overall length, constructed from sintered iron for durable, consistent performance. It is rated for speeds up to 9000 RPM and carries the coupling size code L090. Licensed HVAC, mechanical, and industrial technicians regularly install these hubs in motor-to-pump and motor-to-blower drive assemblies.

This flexible coupling hub is used in residential and light commercial mechanical systems, including HVAC equipment, pumps, compressors, and general-purpose rotating machinery. It is suited for applications where a jaw-style flexible coupling is required to connect two shafts in close proximity. Note that a complete coupling assembly requires two hubs and one spider insert - order components accordingly. This hub is sold individually and is appropriate for both new installations and direct replacement of worn or damaged coupling hubs in the field.

Key Features

• Maximum bore diameter of 3/4 inches with a 3/16 inches x 3/32 inches keyway for secure shaft engagement
• Coupling size code L090, rated to 9000 RPM for high-speed drive applications
• 2.11 inches outer diameter and 2.12 inches overall length for compact inline shaft coupling
• Sintered iron construction for wear resistance and dimensional stability
• Sold as a single hub - two hubs plus one spider required for a complete flexible coupling assembly

Compatibility

Designed as an OEM-style replacement or new-installation hub for jaw-style flexible coupling assemblies using L090 series components. Verify bore diameter, keyway dimensions, and coupling size code against existing hardware before installation.

Installation Notes

Installation should be performed by a qualified mechanical or HVAC technician. Disconnect and lock out all power to the drive system before removing or installing coupling components. Ensure shaft and bore surfaces are clean and free of burrs before pressing the hub onto the shaft. Confirm spider elastomer condition and hub-to-hub gap spacing per the coupling manufacturer's assembly guidelines before returning the system to service.