Lovejoy 68514436128 Flexible Coupling Hub 1.5 in Bore

Product Description

The LOVEJOY 68514436128 is a flexible coupling hub designed for power transmission applications requiring a reliable, torque-transferring connection between shafts. Cast from iron, this hub accepts a maximum bore diameter of 1.5 inches and a keyway measuring 0.375 inches wide by 0.1875 inches deep. With an outer diameter of 4.625 inches and an overall length of 3.94 inches, it fits within a size 7S coupling assembly. Licensed mechanics, millwrights, and HVAC technicians install this type of component to connect driver and driven shafts while accommodating minor misalignment and reducing shock load transmission.

This flexible coupling hub is suited for industrial and commercial mechanical drive systems where rotational power must be transferred between two shafts. Typical applications include pump drives, fan assemblies, compressor shafts, and motor-to-gearbox connections in both light industrial and HVAC mechanical rooms. The cast iron construction handles demanding duty cycles. It is rated to 5,850 RPM, making it appropriate for a wide range of motor-driven equipment operating at standard industrial speeds. It is sold individually and is intended for use with a matching hub and flexible insert or spider element.

Key Features

• Maximum bore diameter of 1.5 inches accommodates common shaft sizes in industrial and HVAC drives
• Keyway dimensions of 0.375 inches wide by 0.1875 inches deep provide positive rotational engagement
• Cast iron construction offers durability under continuous mechanical load
• Rated to 5,850 RPM for compatibility with standard AC motor speeds
• Outer diameter of 4.625 inches and overall length of 3.94 inches in a size 7S coupling profile

Compatibility

Designed as an OEM-style replacement or new-installation flexible coupling hub for size 7S coupling assemblies used in industrial and commercial mechanical drive systems.

Installation Notes

Installation is typically performed by a licensed millwright, mechanical contractor, or HVAC technician. De-energize and lock out the drive motor before mounting or removing any coupling component. The bore and keyway must be deburred and cleaned before pressing or sliding the hub onto the shaft. Verify hub-to-hub gap and angular alignment per the coupling manufacturer's assembly guidelines before returning the system to service.