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TWIN WASHERS has developed a unique security system using tension method instead of friction. DIN 25201 is a norm of wedge-lock system. Twin-Washers cam height is greater than the bolt pitch. In addition, there are radial teeth on the opposite side. The both cams are faced each other. Radial teeth are used under the bolt and the connection surface.
TWIN WASHERS are tightened under the bolt and/or nut. TWIN WASHERS loosening happens too little through angle differences and wedge effect blocks it. Even a very low torque when tightening the bolt connection and it creates a wedge effect which can provide to be blocked connection.
How is resistant to be removed?
Cam angle of TWIN WASHERS u201cu03b8u201d is greater than the thread pitch angle u201cu03b3u201d. Both of slope angles are different. Since angle of the double washer system is larger than thread angle, for this reason it displays extra resistance to removing. When the TWIN WASHERS exposed to extreme vibration or dynamic loads bolt creates a wedge effect on the connection.