Lovejoy 68514417108 Dd-type Double Universal Joint

Product Description

The LOVEJOY 68514417108 is a DD-type double universal joint engineered for applications that require angular misalignment correction across two planes in a single compact assembly. With a rated torque of 1,560 in/lbs, a bore depth of 1 inch, an inside diameter of 1/2 inch, an outside diameter of 1 inch, and an overall length of 6-3/4 inches, this joint delivers reliable power transmission in tight drive configurations. It is typically installed by mechanical contractors, HVAC technicians, or industrial maintenance professionals working on shaft-driven equipment that demands consistent torque transfer despite angular offset.

This double universal joint is suited for use in shaft coupling assemblies where a single Cardan joint would be insufficient to maintain constant velocity or where compound angular misalignment is present. Typical applications include HVAC damper drive shafts, fan and blower drive linkages, and general industrial drive train systems requiring compact double-joint geometry. The DD-type configuration allows the two joint planes to cancel velocity variation, resulting in smoother rotational output compared to a single universal joint at the same operating angle.

Key Features

• DD-type double universal joint design compensates for compound angular misalignment in a single assembly
• 1,560 in/lbs rated torque capacity for demanding drive train applications
• 1 inch bore depth with 1/2 inch inside diameter and 1 inch outside diameter for straightforward shaft fitment
• 6-3/4 inch overall length suits installations with moderate shaft spacing requirements
• Sold as a single unit with no minimum order quantity above one piece

Compatibility

Designed as an OEM-style replacement or direct-fit universal joint for shaft-driven assemblies requiring a DD-type double universal joint with a 1 inch bore depth and 1,560 in/lbs torque rating.

Installation Notes

Installation should be performed by a qualified mechanical or HVAC technician. Disconnect and lock out all power to the drive system before removing or installing any shaft coupling components. Verify that shaft diameters, bore depth, and alignment angles are within the joint's rated specifications before final assembly. Do not exceed the rated torque during operation, and inspect set screws or fastening hardware for proper engagement before returning the equipment to service.