Lovejoy 68514417078 Dd-type Double Universal Joint

Product Description

The LOVEJOY 68514417078 is a DD-type double universal joint designed to transmit rotational motion between shafts that are misaligned or require angular flexibility. The double-joint configuration allows for greater angular deflection than a single universal joint, making it well-suited for drive linkages, actuator assemblies, and mechanical motion transfer applications in HVAC damper controls, industrial equipment, and related systems. It is rated at 378 inch-pounds of torque and features a 5/8-inch bore depth with a 1/4-inch inside diameter and 1/2-inch outside diameter, with an overall length of 4 inches. Installation is typically performed by mechanical technicians and HVAC service professionals.

This double universal joint is used in applications where a rigid shaft coupling is not practical due to angular misalignment between drive and driven shafts. Common installation scenarios include HVAC damper actuator linkages, valve control assemblies, and light-duty mechanical drive systems in both residential and commercial settings. Its compact overall length makes it a practical fit in tight mechanical spaces where standard couplings cannot accommodate offset shaft angles.

Key Features

• DD-type double universal joint design allows angular shaft misalignment in drive linkage applications
• Rated torque of 378 inch-pounds for reliable mechanical power transmission
• 5/8-inch bore depth with 1/4-inch inside diameter and 1/2-inch outside diameter
• 4-inch overall length fits compact mechanical assemblies
• Lightweight construction at 0.23 pounds for easy handling and installation

Compatibility

Designed as an OEM-style replacement or direct-fit universal joint for mechanical drive and linkage assemblies requiring a DD-type double universal joint with a 5/8-inch bore depth and 378 inch-pound torque rating.

Installation Notes

Installation is performed by qualified mechanical or HVAC technicians. Before servicing any drive linkage or actuator assembly, de-energize the equipment and lock out the power source per applicable safety procedures. Ensure shaft alignment is within the angular capacity of the joint and that bore dimensions match the mating shaft before final assembly. Do not exceed the rated torque specification during operation.