TWIN WASHERS® DIN 25201 (locked washers)

TWIN WASHERS®

DIN 25201 STANDARD

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.

are tightened under the bolt and/or nut. 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.

security system uses geometrically to lock bolted connections in the most critical applications. This offers a unique wedge locking system following advantages:

• Providing maximum safety,

• Provides superior resistance to loosening due to vibration and dynamic loads,

• Ease of assembly and disassembly,

• The locking function is not affected by lubrications,

• Low and high preloads positive locking,

• Preload Control,

• The same temperature characteristics as standard nut & bolt,

• Reusability.

How is resistant to be removed?

Cam angle of “θ” is greater than the thread pitch angle “γ”. 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 exposed to extreme vibration or dynamic loads bolt creates a wedge effect on the connection.