Lovejoy 68514441925 Flexible Coupling Hub 20mm Bore

Product Description

The LOVEJOY 68514441925 is a flexible coupling hub designed for use in mechanical power transmission systems. With a 20mm maximum bore and a 6mm wide by 2.8mm deep keyway, this hub accepts keyed shafts and secures positive torque transfer between connected components. The outer diameter measures 2.11 inches and the overall length is 2.12 inches. Constructed from sintered iron, the hub offers reliable wear resistance in industrial drive train applications. A complete flexible coupling assembly requires two hubs and one spider insert, sold separately. Licensed mechanics and millwrights working on pump drives, compressors, fans, and similar rotating equipment will find this hub a straightforward OEM-style replacement or new-installation component.

This hub suits light to medium-duty industrial and commercial applications where shaft misalignment damping is needed. The jaw-style flexible coupling design accommodates minor angular, parallel, and axial misalignment between driver and driven shafts. Common installation scenarios include HVAC fan assemblies, pump sets, and general industrial machinery operating at speeds up to 9000 RPM. The L090 coupling size code identifies the correct mating hub and spider for a complete assembly. Technicians should verify bore size and keyway dimensions against the shaft specification before ordering.

Key Features

• 20mm maximum bore with 6mm x 2.8mm keyway for keyed-shaft installations
• 2.11-inch outer diameter and 2.12-inch overall length for compact fitment
• Sintered iron construction for durability and wear resistance
• Rated to 9000 RPM maximum shaft speed
• L090 coupling size code for straightforward hub and spider matching
• Sold individually — order two hubs and one spider for a complete coupling assembly

Compatibility

Designed for use in LOVEJOY L090 series flexible jaw coupling assemblies. A complete coupling requires two 68514441925 hubs and one compatible L090 spider element. Verify bore, keyway, and coupling size code against the driven and driver shaft specifications before installation.

Installation Notes

Installation is typically performed by a licensed millwright or mechanical technician. De-energize and lock out the drive system before mounting coupling hubs on their respective shafts. Align driver and driven shafts as closely as possible before final tightening to minimize spider wear and extend coupling service life. Do not exceed the rated 9000 RPM operating speed for this hub.