Lovejoy 68514436078 Flexible Coupling Hub 5/8 in Cast Iron

Product Description

The LOVEJOY 68514436078 is a flexible coupling hub designed to transmit torque between shafts while accommodating minor misalignment in mechanical drive systems. This cast iron hub accepts a maximum bore diameter of 5/8 inches and features a 3/16 inch by 3/32 inch keyway width and depth for positive shaft engagement. The outer diameter measures 3-1/4 inches with an overall length of 2.88 inches. Rated to 7,600 RPM, it suits a wide range of industrial and HVAC mechanical drive applications. Installation is typically performed by millwrights, HVAC mechanics, or maintenance technicians working on coupled shaft assemblies.

This flexible coupling hub is used in applications where two shafts must be joined with some capacity for angular, parallel, or axial misalignment. Common install scenarios include fan drives, pump drives, and motor-to-shaft connections in light industrial and commercial mechanical systems. The cast iron construction provides durability in environments where moderate shock loads and vibration are present. The hub is part of the 6J coupling size family and is intended for use as one half of a complete flexible coupling assembly paired with a mating hub and spider insert.

Key Features

• Maximum bore diameter of 5/8 inches for compatibility with common shaft sizes
• 3/16 inch by 3/32 inch keyway provides positive, non-slip shaft engagement
• 3-1/4 inch outer diameter and 2.88 inch overall length in a compact profile
• Rated to 7,600 RPM for use in higher-speed drive applications
• Cast iron construction for durability under moderate shock and vibration loads
• Coupling size code 6J for use with matching LOVEJOY 6J series hubs and spider elements

Compatibility

This hub carries coupling size code 6J and is designed for use in LOVEJOY 6J series flexible coupling assemblies. A mating hub and spider insert of the same series are required to complete the coupling. No additional compatible model numbers or system families were specified in the product data.

Installation Notes

Installation is performed by a qualified mechanic or millwright. De-energize and lock out the drive motor before beginning any shaft or coupling work, following applicable OSHA lockout/tagout procedures. Ensure bore and keyway dimensions match the shaft before pressing or fitting the hub. Do not exceed the rated 7,600 RPM and verify alignment of both hubs after assembly to minimize load on the spider element.