Lovejoy 68514436122 Flexible Coupling Hub 1-1/8 in Bore

Product Description

The LOVEJOY 68514436122 is a cast iron flexible coupling hub designed to connect rotating shafts in mechanical drive systems. It accepts a maximum bore diameter of 1-1/8 inches and is machined with a 1/4 inch by 1/8 inch keyway to secure the hub to a keyed shaft. The hub measures 4-5/8 inches in outer diameter and 3.94 inches overall length, making it a mid-frame coupling component suited for industrial pumps, fans, compressors, and HVAC drive assemblies. Rated to a maximum of 5850 RPM, it handles moderate-to-high-speed shaft connections. Licensed mechanics, millwrights, and HVAC technicians typically specify this hub where shaft misalignment compensation is required alongside positive torque transmission.

This flexible coupling hub is used in a wide range of mechanical and HVAC applications including pump drives, blower assemblies, and compressor hookups in both light industrial and commercial settings. The size 7S coupling designation places it in a well-established coupling series, making it a straightforward drop-in for new installations and replacement jobs. It is particularly relevant to commercial HVAC and refrigeration systems where motor-to-pump or motor-to-blower shaft connections require a flexible element to absorb vibration and minor angular or parallel misalignment.

Key Features

• Maximum bore diameter of 1-1/8 inches for versatile shaft fitment
• 1/4 inch by 1/8 inch keyway provides positive rotational engagement
• 4-5/8 inch outer diameter for size 7S coupling series applications
• Rated to 5850 RPM for moderate-to-high-speed drive systems
• Cast iron construction for durability in industrial and HVAC environments
• 3.94 inch overall length suits standard mid-frame coupling assemblies

Compatibility

Designed as an OEM-style replacement or new-installation hub for size 7S flexible coupling assemblies in HVAC, pump, blower, and light industrial drive applications.

Installation Notes

Installation should be performed by a qualified millwright, mechanic, or HVAC technician. Disconnect and lock out all power to the drive system before handling any coupling components. Ensure the mating shaft is clean, burr-free, and within the specified bore tolerance before pressing the hub into position. Verify coupling element alignment after installation to prevent premature wear on the flexible insert.