Lovejoy 68514436138 Flexible Coupling Hub 1-1/4 in Bore

Product Description

The LOVEJOY 68514436138 is a flexible coupling hub designed for power transmission applications in mechanical and industrial drive systems. It accepts a maximum bore diameter of 1-1/4 inches and features a keyway measuring 1/4 inches wide by 1/8 inches deep for positive rotational drive engagement. The hub has an outer diameter of 5.45 inches and an overall length of 4.44 inches. Constructed from cast iron, it provides the rigidity and wear resistance expected in shaft coupling assemblies. This hub is one half of a flexible coupling set, typically installed by mechanical technicians or millwrights on pumps, fans, compressors, and similar rotating equipment.

This flexible coupling hub suits applications in HVAC mechanical rooms, commercial pump systems, industrial fan drives, and general power transmission setups. The size code 8S designation identifies its coupling series, making it straightforward to match with the correct spider element and mating hub. It is appropriate for both new installations and replacement work on existing drive trains where the original hub has worn or failed. Maximum rated speed is 4500 RPM, making it suitable for a wide range of motor-driven loads in both light commercial and industrial settings.

Key Features

• 1-1/4 inch maximum bore diameter accommodates common shaft sizes in pump and fan applications
• Keyway slot at 1/4 inches wide by 1/8 inches deep ensures positive keyed shaft engagement
• 5.45 inch outer diameter and 4.44 inch overall length for size code 8S coupling assemblies
• Cast iron construction provides durability and resistance to wear in rotating drive applications
• Rated to 4500 RPM for compatibility with standard motor-driven equipment

Compatibility

Designed as an OEM-style replacement or new-installation flexible coupling hub for size code 8S coupling assemblies in mechanical power transmission systems. Match with the corresponding mating hub and spider element of the same coupling size code for a complete assembly.

Installation Notes

Installation is typically performed by a qualified millwright or mechanical technician. Disconnect and lock out all electrical power to the drive motor before beginning any coupling work, following applicable NFPA 70E lockout/tagout procedures. Ensure the shaft and bore are clean and free of burrs before pressing the hub into position, and confirm the keyway and key dimensions match before final assembly. Do not operate the coupling hub without the spider element properly seated between both hubs.