Lovejoy 68514441459 Flexible Coupling Hub 20mm Bore

Product Description

The LOVEJOY 68514441459 is a flexible coupling hub designed for use in power transmission applications where shaft misalignment, vibration damping, and torque transfer are required. This hub features a 20mm maximum bore with a 6mm wide by 2.8mm deep keyway, allowing secure shaft engagement. The outer diameter measures 1.75 inches and the overall length is 2.12 inches. Constructed from sintered iron, the hub offers consistent dimensional tolerances and durability under rotational loads. A complete flexible coupling assembly requires two hubs and one spider insert, which are ordered separately. This component is suited for mechanical and industrial service work performed by millwrights, maintenance technicians, and mechanical contractors.

This flexible coupling hub is used in a wide range of light-to-medium industrial and commercial mechanical drive applications, including pump drives, compressor shafts, conveyor systems, and HVAC equipment shaft couplings. The L075 coupling size code designates the standard jaw-type flexible coupling series to which this hub belongs. The hub is compatible with standard spider inserts of the same coupling size designation. Typical installations involve pairing two hubs on respective drive and driven shafts with a spider element seated between the jaw faces to complete the flexible drive connection.

Key Features

• 20mm maximum bore accommodates metric shafting commonly found in industrial equipment
• 6mm x 2.8mm keyway provides positive rotational engagement between hub and shaft
• Sintered iron construction delivers consistent dimensional accuracy and durability
• 1.75 inch OD and 2.12 inch overall length fit standard L075 coupling envelope dimensions
• Rated up to 10,000 RPM maximum speed for high-cycle drive applications
• Sold individually — order two hubs and one spider insert for a complete coupling assembly

Compatibility

This hub corresponds to coupling size code L075 and is intended for use with matching L075-series flexible coupling hubs and spider inserts. Two hubs and one spider insert are required to complete the coupling assembly.

Installation Notes

Installation is typically performed by a millwright or qualified mechanical technician. De-energize and lock out the drive system before mounting or removing coupling components. Ensure shaft and bore surfaces are clean and free of burrs before pressing or fitting the hub. Confirm spider element condition and replace if worn before completing final assembly, as spider degradation can cause vibration and accelerated hub wear.