Lovejoy 68514436126 Flexible Coupling Hub 1-3/8 in Bore

Product Description

The LOVEJOY 68514436126 is a flexible coupling hub designed for power transmission applications in mechanical and industrial drive systems. This cast iron hub accepts a maximum bore diameter of 1-3/8 inches and features a 5/16 inch wide by 5/32 inch deep keyway for positive shaft engagement. With a 4-5/8 inch outer diameter and an overall length of 3.94 inches, it is sized for mid-range shaft coupling assemblies. Rated to a maximum of 5,850 RPM, it suits moderate- to high-speed drive configurations. Installation is typically performed by mechanical contractors, millwrights, or HVAC equipment technicians working on motor-to-load connections.

This coupling hub is used in flexible jaw-style or jaw-and-spider coupling assemblies commonly found in commercial HVAC equipment, pumps, compressors, and general power transmission setups. It pairs with a mating hub and a flexible elastomeric spider insert to transmit torque while accommodating minor shaft misalignment. The cast iron construction holds up in demanding mechanical environments where vibration and repetitive loading are present.

Key Features

• Maximum bore diameter of 1-3/8 inches for shaft engagement
• Keyway dimensions of 5/16 inch wide by 5/32 inch deep for positive drive retention
• 4-5/8 inch outer diameter suits mid-range coupling assemblies
• Overall length of 3.94 inches
• Cast iron construction for durability in industrial and mechanical environments
• Rated to 5,850 RPM maximum speed

Compatibility

Designed as an OEM-style replacement or serviceable component for flexible jaw coupling assemblies using a Size 7S coupling designation.

Installation Notes

Installation is performed by qualified millwrights or mechanical technicians. Disconnect and lock out all power to the drive system before removing or installing any coupling component. Verify that bore diameter, keyway dimensions, and coupling size code match both the shaft and the mating hub before pressing or fitting the hub onto the shaft. Torque all fasteners per the equipment manufacturer specifications and confirm shaft alignment before returning the drive system to service.