Lovejoy 68514417026 Dd-type Double Universal Joint

Product Description

The LOVEJOY 68514417026 is a DD-type double universal joint designed to transmit rotational motion between shafts that are misaligned or require angular articulation. Double universal joints cancel the velocity variation inherent in single U-joints by using two joints in series, making them well suited for applications where smooth, constant-velocity output is required. This joint features a 1 inch bore depth, accepts a 1/2 inch inside diameter shaft and 1 inch outside diameter, and has an overall length of 6-3/4 inches. Rated at 1,560 in/lb torque, it is built for demanding mechanical drive applications. Mechanical contractors, millwrights, and industrial maintenance technicians typically install this type of component.

This double universal joint is used in mechanical power transmission systems where two shafts must connect across an angle or offset. Typical install scenarios include pump drives, conveyor systems, HVAC equipment linkages, and industrial machinery where a rigid coupling is not practical. The DD-type configuration allows for greater angular misalignment than a single joint while maintaining more uniform rotational output. It is appropriate for both light industrial and commercial mechanical systems requiring a compact, articulating drive connection.

Key Features

• DD-type double universal joint design cancels velocity variation for smoother output
• 1,560 in/lb torque rating for demanding drive applications
• 1 inch bore depth accommodates common shaft sizes
• 1/2 inch inside diameter by 1 inch outside diameter shaft interface
• 6-3/4 inch overall length fits compact drive system envelopes
• Single-piece packaging with a minimum order quantity of 1

Compatibility

Designed as an OEM-style replacement or direct-fit universal joint for mechanical power transmission systems requiring a DD-type double universal joint with a 1/2 inch inside by 1 inch outside shaft diameter and 1,560 in/lb torque capacity.

Installation Notes

Installation is typically performed by a millwright, mechanical contractor, or qualified maintenance technician. Disengage and lock out all power to the drive system before removing the existing joint or installing this component. Verify shaft diameter, bore depth, and angular alignment requirements before installation to ensure proper fit and avoid premature wear. Follow applicable ANSI and machinery manufacturer guidelines for coupling installation torque and shaft retention methods.