Lovejoy 68514417094 Dd-type Double Universal Joint

Product Description

The LOVEJOY 68514417094 is a DD-type double universal joint designed for mechanical drive applications requiring articulated torque transmission between shafts. It handles up to 768 inch-pounds of torque and features a 7/8-inch bore depth with a 0.38-inch boot inside diameter and a 0.75-inch boot outside diameter. The overall assembly length (OAL) is 5.375 inches. This joint is typically installed by mechanical, HVAC, or industrial service technicians working on drive shaft assemblies, positioning systems, or coupled equipment where angular misalignment must be accommodated across a double-jointed axis.

This double universal joint suits applications where a single Cardan-type joint would introduce cyclic velocity variation. The DD configuration cancels that variation by phasing two joints in series. Typical use cases include industrial machinery, pump drives, valve actuators, and equipment where compact articulated shaft connections are required. The 768 in/lb torque rating makes it appropriate for light-to-medium duty mechanical drive installations.

Key Features

• DD-type double universal joint construction cancels cyclic velocity error inherent in single universal joints
• 768 inch-pound torque capacity for light-to-medium duty drive applications
• 7/8-inch bore depth accommodates standard shaft sizing
• Boot inside diameter of 0.38 inches, outside diameter of 0.75 inches
• 5.375-inch overall assembly length in a compact envelope
• Sold as individual unit with a minimum order quantity of one

Compatibility

Designed as an OEM-style replacement or direct-fit double universal joint for mechanical drive assemblies requiring a DD-type configuration with a 768 in/lb torque rating and 7/8-inch bore depth.

Installation Notes

Installation should be performed by a qualified mechanical or service technician. Disconnect and lock out all power to the driven equipment before removing or installing the joint. Ensure shaft alignment and phasing of the two joint yokes are correct to achieve the velocity-canceling benefit of the DD configuration. Verify that operating angles and torque loads remain within the rated capacity of the joint during service.