Lovejoy 68514441333 Flexible Coupling Hub 28mm Bore

Product Description

The LOVEJOY 68514441333 is a flexible coupling hub designed for use in power transmission applications where shaft-to-shaft connection and vibration damping are required. With a 28mm maximum bore and an 8mm wide by 3.3mm deep keyway, this hub accepts a keyed shaft and transfers torque through a spider element. The outer diameter measures 3.31 inches and the overall length is 4.25 inches. Constructed from sintered iron, the hub provides durable service in industrial and mechanical drive systems. A complete coupling assembly requires two hubs and one spider, sold separately.

This flexible coupling hub is suited for mechanical drive systems in light industrial, HVAC equipment, pump drives, and general-purpose power transmission setups. It is rated up to 5000 RPM, making it appropriate for moderate-speed motor and shaft couplings. The hub is sized to the L110 coupling size code, which identifies the compatible spider and mating hub. Installation is handled by mechanical contractors or maintenance technicians working on rotating equipment.

Key Features

• 28mm maximum bore accommodates a wide range of shaft diameters up to 28mm
• 8mm x 3.3mm keyway secures the hub to a keyed shaft for positive torque transfer
• 3.31-inch outer diameter and 4.25-inch overall length for compact installation
• Sintered iron construction provides strength and wear resistance in industrial environments
• Rated up to 5000 RPM for moderate-speed drive applications
• L110 coupling size code — order two hubs and one spider for a complete assembly

Compatibility

Designed for use with L110 series flexible coupling spiders and mating hubs. A complete coupling requires two hubs and one compatible L110 spider element. Consult the LOVEJOY L-jaw coupling selection guide to confirm spider durometer and torque rating for the specific application.

Installation Notes

Installation is performed by qualified mechanical or maintenance technicians. De-energize and lock out the drive motor before mounting or removing any coupling components. Press or slide the hub onto the shaft, aligning the keyway, and secure with a setscrew or retaining hardware as required by the application. Do not operate the coupling without the spider element seated between both hubs, as metal-to-metal contact will occur.