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federnfabrik fasteners: Locking washers are a type of fastener with a flat, ring-like shape. Placed between the bearing surface of a bolt, screw, or nut and the surface of the connected part, they increase the contact area, reduce pressure per unit area, and protect the connected part's surface from damage. Another type, elastic washers, also prevents nuts from loosening. The locking washer consists of two pieces. Its unique embedded structure changes the traditional method of relying primarily on friction for locking, instead adopting the most advanced international locking technology, utilizing the tension between the two washers to achieve both locking and tightening effects. It prevents loosening caused by vibration and dynamic loads, is easy to disassemble, and the loosening torque is greater than the tightening torque. The locking effect is not affected by lubrication; increased lubrication improves the locking effect. It has the same temperature characteristics as standard bolts/nuts and can be reused a limited number of times.

federnfabrik fasteners functions

Locking washers bring convenience to the mechanical industry by preventing thread loosening. There are many varieties of locking washers, including butterfly washers, saddle washers, spring washers, and wave spring washers, collectively known as locking washers. These types of locking washers rely on increasing static friction to achieve their locking effect, which meets enterprise needs under conditions of low vibration, light load, and uniform speed. However, under strong vibration, high load, and rapid motion, they do not achieve complete locking, only extending the time before the nut and bolt spontaneously loosen. This breaks away from the traditional method of using increased "preload" and enhanced "friction" for locking. The latest locking principle is applied not only in washers but also in nuts and bolts, solving the problem of fastener loosening in heavy industry enterprises and eliminating the need to reference tightening and loosening torques during installation.

federnfabrik fasteners installation requirements

Locking washers are characterized by simple installation. Simply place the two washers with their inner inclined tooth surfaces facing each other between the nut and the connected material. After the nut is tightened, the outer radial cam surface of the locking washer bites into the contact surfaces on both ends, and the angle of the inner inclined tooth surface is greater than the thread angle of the bolt. When the bolt is elongated due to mechanical vibration, the nut rotates and loosens. Since the friction on the outer radial cam surface of the locking washer is greater than the friction between the inner inclined tooth surfaces, relative movement is allowed only between the inner inclined tooth surfaces, generating a certain lifting tension. When the bolt contracts, the inclined tooth surfaces of the washer return the nut to its original position, thereby achieving a 109% locking and tightening effect. The washers are suitable for relatively flat and smooth surfaces. If the connected material is non-metallic, a metal plate can be fixed to the connected material to allow the use of locking washers.

federnfabrik fasteners applications

Due to different environments, the material requirements for locking washers vary. They are characterized by a wide variety of specifications, diverse performance and uses, and a high degree of standardization, serialization, and generalization. Some refer to locking washers that meet national standards as standard fasteners or simply standard parts. Stainless steel locking washers have inherent corrosion resistance; when the surface is damaged, a thin oxide layer forms on the metal surface to prevent further corrosion. Typically, this series of actions—blocking, shearing, adhering, and seizing—occurs within just a few seconds, so correct understanding and use of these fasteners are essential to prevent this phenomenon. Locking washers are suitable for equipment subject to frequent vibration, such as in the automotive industry, compressors, construction, wind power generation equipment, agricultural machinery, casting industry, drilling equipment, shipbuilding industry, mining equipment, oil drilling rigs (onshore or offshore), public utilities, rail transit, transmission systems, and metallurgical equipment.

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