Lovejoy 68514436165 Flexible Coupling Hub 2-1/8 in Bore

Product Description

The LOVEJOY 68514436165 is a cast iron flexible coupling hub designed for power transmission applications requiring a durable, high-torque connection between shafts and driven equipment. With a maximum bore diameter of 2-1/8 inches and a keyway measuring 1/2 inch wide by 1/4 inch deep, this hub accommodates a standard keyed shaft connection. The outer diameter measures 6.35 inches and the overall length is 5.06 inches. Rated to 3750 RPM, it is suited for moderate- to high-speed mechanical drive systems. HVAC, pump, and industrial equipment technicians install this type of coupling hub when connecting motors, compressors, or blowers to driven loads.

This flexible coupling hub is used in mechanical power transmission systems found in commercial HVAC equipment, pump stations, and industrial drive assemblies. It is appropriate for applications where shaft misalignment or vibration damping between driver and driven components is required. The coupling size code is 9S. Cast iron construction makes it a practical choice for indoor mechanical rooms and equipment rooms where corrosion exposure is limited. Installation is typically performed by millwrights, HVAC mechanics, or industrial maintenance technicians.

Key Features

• Maximum bore diameter of 2-1/8 inches for keyed shaft fitment
• Keyway dimensions: 1/2 inch wide by 1/4 inch deep for standard key stock
• 6.35 inch outer diameter and 5.06 inch overall length
• Rated to 3750 RPM for moderate- to high-speed drive applications
• Cast iron construction for durability in mechanical drive environments
• Coupling size code 9S for cross-reference and replacement selection

Compatibility

Designed as an OEM-style replacement or direct-fit flexible coupling hub for mechanical drive assemblies using a size 9S coupling with a maximum 2-1/8 inch bore and standard 1/2 inch by 1/4 inch keyway.

Installation Notes

Installation should be performed by a qualified millwright or mechanical technician. De-energize and lock out the motor or driver unit completely before removing the existing coupling hub. Ensure shaft and bore surfaces are clean and free of burrs before pressing or fitting the hub. Verify shaft alignment after installation to avoid premature coupling wear or failure.