Zero-backlash jaw couplings from Ruland have high dampening capabilities, can accommodate all forms of misalignment, and are highly customizable. They are well-suited for servo motors that are often used in precise positioning applications found in semiconductor, solar, medical and robotics. Zero-backlash jaw couplings are a three-piece design comprised of two lightweight aluminium hubs and an elastomeric insert “spider.” The spider is available in three durometers: 98 Shore A for the highest torque, 92 Shore A for a balance of stiffness and compliance, and 85 Shore A for the highest dampening capabilities. Inch, metric, keyed, and keyless hubs with clamp or set screw hardware can be combined to fit user shaft requirements.