Lovejoy 69790405238 Flexible Coupling Hub Series 1090

Product Description

The LOVEJOY 69790405238 is an alloy steel flexible coupling hub designed for use in grid-style coupling assemblies. It accepts bore diameters from 1.062 inches up to 3.5 inches and features an outside diameter of 3.88 inches. Rated at 33,000 inch-pounds of torque, this hub is built for demanding power-transmission applications in industrial and mechanical drive systems. It belongs to the Series 1090 coupling family. Installation requires two hubs, one grid, and one cover to form a complete coupling assembly. Mechanical contractors and industrial maintenance technicians are the primary installers.

This hub is suited for shaft-to-shaft coupling applications in industrial machinery, pumps, compressors, and similar rotating equipment. The Series 1090 designation identifies the coupling size class, which governs grid and cover selection. Because a complete coupling requires two matching hubs, technicians should confirm both hubs are the same series before ordering grids and covers. This part ships as a single hub. It is appropriate for applications where misalignment absorption and shock-load dampening are required in the drivetrain.

Key Features

• Alloy steel construction for high torque and wear resistance
• Bore range of 1.062 to 3.5 inches accommodates a wide range of shaft sizes
• Outside diameter of 3.88 inches, Series 1090 size class
• Rated torque of 33,000 inch-pounds for heavy-duty drive applications
• Grid-style coupling design provides misalignment tolerance and vibration dampening
• Sold as a single hub — two hubs, one grid, and one cover required for a complete assembly

Compatibility

Designed for use within the LOVEJOY Series 1090 grid coupling system. A complete coupling assembly requires two Series 1090 hubs, one matching grid, and one Series 1090 cover. Verify series compatibility for all components before assembly.

Installation Notes

Installation should be performed by a qualified mechanical technician. De-energize and lock out all connected equipment before beginning shaft work, following applicable LOTO procedures. Confirm shaft diameter falls within the 1.062 to 3.5 inch bore range before fitment. Do not force or impact the hub onto the shaft in a manner that could damage the grid seat or bore surface.