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Angular Transmission 4R Mechanism 1

This is the double Cardan.

Angle between the input and output is A = 90 deg. The orange S-link has a virtual axle.

Angle between the virtual axle of the orange S-link and the input shaft is B = A/2 = 45 deg. This condition makes the mechanism a constant-velocity joint.

The orange link rotates without fixed bearing.

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