Torque limiters in which the torque is transmitted by the balls/rollers. The torque limit value is regulated by adjusting the pressure exerted by the springs.
Once the torque limit value is reached , the moving part of the limiter rotates causing the leak of the balls/rollers connecting the fixed par to the moving one.
This produces an axial movement that activates the release switch and stops the machine/plant instantaneously. 

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