The Lovejoy DD-7 universal joint coupling is a double friction bearing universal joints, only capable of 1750 RPM. While more flexible than a standard uni joint it can only run at lower speeds
At Twin Spring we have a no greasing/bearing replacement. The Twin Spring design absorbs vibration and one ball bearing allows the coupling to flex to 45 degrees.
Offering high speed (Up to 7000 rpm) and high torque (up to 500ft lbs. nominal static torque)
The Twin Spring Coupling is a great maintenance free replacement for the Lovejoy DD-7
Industrial power transmission couplings
Lovejoy DD-7B -TSC300 3/4″ Block and Pin universal joint replacement
Lovejoy DD-7 block and pin universal joint replacement with a Twin Spring Coupling TSC300. Nominal Torque: 300ft lbs./295kw/3600 in lbs. Flexible: Up to 45°. High Speed: Up to 7000 RPM. No bearings to grease or replace when worn. Replaces Lovejoy, Belden, Ruland, Curtis, SKF, Spicer, Boston Gear, SIT and all other universal joint manufacturers.