Lovejoy 69790400074 Rigid Coupling Hub 1.5 in Bore Carbon Steel

Product Description

The LOVEJOY 69790400074 is a rigid coupling hub designed to connect rotating shafts in mechanical drive systems. It features a 1-1/2 inch bore and a 4-3/4 inch outside diameter, machined from carbon steel for reliable torque transmission. A 3/8 inch wide by 3/16 inch deep keyway allows positive key engagement, preventing shaft slippage under load. This hub is a direct mechanical component installed by industrial maintenance technicians, millwrights, and mechanical contractors working on pumps, compressors, conveyors, and related rotating equipment.

This rigid coupling hub is suited for use in fixed-shaft applications where shaft alignment is precise and flex accommodation is not required. Typical installations include pump-to-motor couplings, gearbox connections, and conveyor drive assemblies in both commercial and light industrial environments. The carbon steel construction handles moderate to heavy torque loads in dry, indoor mechanical drive applications.

Key Features

• 1-1/2 inch bore diameter for direct shaft mounting
• 4-3/4 inch outside diameter provides robust hub body for torque loads
• 3/8 inch x 3/16 inch keyway for positive key-driven shaft engagement
• Carbon steel construction for strength and durability in mechanical drive service
• Rigid design requires precise shaft alignment prior to installation

Compatibility

Designed as an OEM-style replacement or direct-fit hub for rigid coupling assemblies requiring a 1-1/2 inch bore with a 3/8 inch x 3/16 inch keyway.

Installation Notes

Installation should be performed by a qualified millwright or mechanical technician. De-energize and lock out all power to the drive system before beginning work. Verify shaft alignment to manufacturer tolerances before tightening, as rigid couplings do not accommodate angular or parallel misalignment. Use appropriate hub-pulling and pressing tools to avoid damage to the bore or keyway during installation or removal.