Lovejoy 68514436084 Flexible Coupling Hub 1.125in Bore

Product Description

The LOVEJOY 68514436084 is a flexible coupling hub designed for use in power transmission applications where shaft misalignment, vibration damping, or torque transfer between rotating components is required. This hub accepts a maximum bore diameter of 1.125 inches and features a keyway measuring 0.25 inches wide by 0.125 inches deep for positive key-driven shaft engagement. The hub has an outer diameter of 4 inches and an overall length of 3.5 inches. Constructed from cast iron, it offers the rigidity and wear resistance expected in industrial and mechanical drive assemblies. It is sized to the 6J coupling code and is rated for speeds up to 6,000 RPM.

This coupling hub is used in mechanical and industrial power transmission setups where two shafts must be connected with a degree of flexibility to accommodate minor angular, parallel, or axial misalignment. Typical applications include pump drives, compressor drives, conveyor systems, and general industrial machinery. The hub is one half of a complete flexible coupling assembly and is paired with a mating hub and a flexible spider insert element. Installation is typically performed by millwrights, maintenance technicians, or mechanical contractors working on rotating equipment.

Key Features

• Maximum bore diameter of 1.125 inches for shaft fitment
• Keyway dimensions of 0.25 inches wide by 0.125 inches deep for positive drive engagement
• 4 inches outer diameter and 3.5 inches overall length
• Cast iron construction for rigidity and durability in industrial environments
• Rated to 6,000 RPM for compatibility with moderate- to high-speed drive applications
• Coupling size code 6J for matching with compatible mating hubs and spider elements

Compatibility

Designed as an OEM-style flexible coupling hub sized to the 6J coupling code. Pairs with a corresponding 6J mating hub and a compatible flexible spider insert to form a complete jaw-type flexible coupling assembly.

Installation Notes

Installation is typically performed by a millwright or qualified mechanical technician. Always de-energize and lock out the drive system before installing or removing coupling components. The bore should be finish-machined to the required shaft tolerance before installation, and the keyway must be aligned with the shaft key before pressing or securing the hub. Do not exceed the rated 6,000 RPM speed limit for this coupling size.