The Curved jaw design has a radial curvature to the jaw face and both radial and axial curvature (crowning) to the spider element. This provides better torsional softness and an angular misalignment capability. 

The curved jaw type coupling gives reliable service for light, medium, and heavy duty electrical motor and internal combustion engine power transmission applications. Common applications for curved jaw type couplings include connecting power sources to pumps, gear boxes, compressors, blowers and fans, mixers, conveyors and generator sets.

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Curved Jaw Couplings