Lovejoy 68514411737 Flexible Coupling Hub 7/8 Inch Bore

Product Description

The LOVEJOY 68514411737 is a flexible coupling hub designed for use in mechanical power transmission applications where shaft misalignment, vibration damping, and torque transfer are required. This hub features a maximum bore diameter of 0.875 inches and a keyway measuring 3/16 inches wide by 3/32 inches deep, allowing secure shaft engagement under load. The outer diameter measures 3.31 inches with an overall length of 4.25 inches. Constructed from sintered iron, the hub offers good wear resistance and dimensional consistency for industrial drive applications. Note that one complete coupling assembly requires two hubs and one spider element, which are ordered separately.

This flexible coupling hub is suited for industrial and commercial mechanical drive systems including pumps, compressors, fans, and conveyor equipment where rotational power must be transferred between two shafts. The L110 coupling size code designates the hub series and governs spider compatibility. With a maximum rated speed of 5,000 RPM, the hub covers a broad range of motor and drive shaft applications encountered in HVAC, pump, and general mechanical service work. Technicians and millwrights working on belt-drive and direct-drive equipment will find this hub appropriate for standard motor shaft sizes in the 7/8 inch bore range.

Key Features

• Maximum bore diameter of 0.875 inches accommodates common motor and pump shaft sizes
• 3/16 inch wide by 3/32 inch deep keyway for positive torque transmission under load
• 3.31 inch outer diameter and 4.25 inch overall length for the L110 coupling series
• Sintered iron construction provides consistent dimensional tolerances and wear resistance
• Rated to 5,000 RPM for compatibility with standard single and three-phase motor speeds
• Two hubs plus one spider required for a complete coupling assembly

Compatibility

This hub is designated coupling size code L110 and is compatible with L110-series spider elements. Two hubs of matching size are required along with one spider to complete the coupling. Verify bore diameter and keyway dimensions against shaft specifications before ordering.

Installation Notes

Installation should be performed by a qualified millwright or mechanical technician. De-energize and lock out the motor per NFPA 70E and applicable OSHA lockout/tagout procedures before mounting hubs onto shafts. Ensure shaft surfaces are clean and free of burrs before pressing the hub into position, and confirm that both hubs and the spider are fully seated and aligned before returning the drive to service. Do not operate the coupling beyond its rated maximum speed.