Lovejoy 68514436140 Flexible Coupling Hub 1.375in Bore

Product Description

The LOVEJOY 68514436140 is a flexible coupling hub designed for mechanical power transmission in industrial and commercial drive systems. With a maximum bore diameter of 1.375 inches and a 5/16 inch by 5/32 inch keyway, this hub accepts a keyed shaft for positive torque transfer. The overall diameter measures 5.45 inches and the overall length is 4.44 inches. Constructed from cast iron, it delivers the rigidity and wear resistance required in demanding rotating-equipment applications. This hub is sized to the 8S coupling series and is rated to 4500 RPM. Installation is typically performed by millwrights, industrial mechanics, or HVAC equipment technicians working on belt or direct-drive systems.

This flexible coupling hub is suited for use in pumps, fans, compressors, and similar rotating equipment where shaft misalignment must be accommodated and vibration damping is required. The cast iron construction makes it appropriate for moderate-duty industrial environments. It pairs with a mating hub and a flexible insert element to complete the coupling assembly. Verify shaft diameter, keyway dimensions, and coupling size code against the driven and driving equipment before installation.

Key Features

• 1.375 inch maximum bore diameter accepts a wide range of shaft sizes up to that dimension
• 5/16 inch wide by 5/32 inch deep keyway for positive shaft engagement and torque transmission
• 5.45 inch outer diameter and 4.44 inch overall length for the 8S coupling size family
• Rated to 4500 RPM for compatibility with standard motor and pump speeds
• Cast iron construction provides strength and dimensional stability under load
• Part of a three-piece flexible coupling system requiring a mating hub and spider insert

Compatibility

Designed as an OEM-style replacement or new-installation flexible coupling hub for rotating equipment applications using the 8S coupling size code. Confirm bore diameter, keyway dimensions, and coupling series with the application before ordering.

Installation Notes

De-energize and lock out all power to the drive system before beginning coupling installation or removal. A qualified millwright or mechanical technician should perform the work, using appropriate bore and keyway measurement tools to confirm fit before pressing or securing the hub to the shaft. Do not hammer directly on the hub face; use a hub puller or press as appropriate to avoid damage to the bore or keyway. Verify coupling alignment after installation per the equipment manufacturer's specifications.