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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-7-TSC300 3/4″


Lovejoy DD-7 universal joint with TSC300 300 ft lbs replacement for mechanical power transmission couplings and universal joint in any industrial power transmission application

Couplings in an industrial power transmission setup have a number of issues to contend with, annual maintenance, fundamental design flaws coming from a century old technology, industry has evolved but the technology that makes up the standard coupling and uni joints has not. Twin Spring Coupling offers something different. Industrial power transmission is broken into two main areas, high speed low angle of misalignment and lower speed higher angle of misalignment. Traditionally these two needs have been service by two different couplings. Motion control couplings like beam, bellows, jaw, elastomeric type couplings and the universal joint. No bearings to grease or replace. Flexible as a universal joint. Torsionally rigid for high speed applications. One piece design. Replaces Spicer                         KTR                          SIT. Huco                           Altra                         Belden. Tsubaki                       R+W                         Lovejoy. TB Woods                  Guardian Couplings  Ruland. Helical                        McMaster Carr          Boston Gear. Neapco                      Moog                          SKF.