Lovejoy 68514436059 Flexible Coupling Hub 3.25in Od Cast Iron

Product Description

The LOVEJOY 68514436059 is a cast iron flexible coupling hub designed to connect rotating shafts in mechanical drive systems. It accepts a maximum bore diameter of 0.75 inches and includes a keyway measuring 3/16 inches wide by 3/32 inches deep for positive key engagement. The hub has an outer diameter of 3.25 inches and an overall length of 2.88 inches. Rated to 7,600 RPM, it is suited for moderate- to high-speed power transmission applications. Installation is typically performed by mechanical contractors, millwrights, or HVAC technicians working on belt-drive or direct-drive equipment.

This flexible coupling hub is used in a range of mechanical power transmission setups including HVAC fan assemblies, pump drives, and light industrial equipment. The cast iron construction provides durability in environments where moderate vibration and torque loads are present. It is appropriate for both residential and commercial mechanical systems where shaft misalignment compensation and vibration dampening are required. The coupling size code for this hub is 5J, which is used to match compatible spider inserts and mating hubs.

Key Features

• Maximum bore diameter of 0.75 inches accommodates a range of shaft sizes up to 3/4 inches
• Keyway dimensions of 3/16 inches wide by 3/32 inches deep for standard key stock fitment
• Rated to 7,600 RPM for moderate- to high-speed drive applications
• Cast iron construction provides strength and resistance to mechanical wear
• Coupling size code 5J for matching with compatible hubs and spider elements
• Compact profile with 3.25 inches OD and 2.88 inches overall length

Compatibility

Designed as an OEM-style replacement flexible coupling hub for mechanical drive systems using size 5J coupling components. Compatible hubs and spider inserts must match the 5J coupling size code.

Installation Notes

Installation should be performed by a qualified millwright, mechanical contractor, or licensed technician. Disconnect and lock out all power to the drive system before beginning shaft coupling work, following OSHA lockout/tagout procedures. Ensure the shaft diameter and keyway dimensions are confirmed before pressing or sliding the hub onto the shaft. Do not exceed the rated maximum RPM of 7,600 for this hub.