Industry News

What is the purpose of a lock washer?

2024-09-27

A lock washer is a component used with a fastener and is designed to prevent loosening of a threaded connection due to vibration, temperature cycling and wear.Lock washers effectively prevent this loosening by increasing the friction and locking capabilities of fasteners. Their design and material selection ensure they stay in place even under harsh conditions, providing additional stability, especially in applications where safety and reliability are critical.

lock washer


The elastic lock washer increases the friction between the bolt and the nut by providing elastic support between the nut and the base to prevent loosening. When the nut or bolt is subjected to vibration or external impact, if the bolt and nut loosen, the elastic lock washer will release the stored energy and tighten them again.


Friction lock washers are generally toothed or corrugated, with a surface that is roughly similar to splines. This structure increases friction between the threads, thereby preventing bolts and nuts from loosening. When the nut and bolt are subjected to vibration or external impact, the friction will increase, thus preventing the bolt and nut from loosening.


Lock washers are widely used in mechanical equipment and industrial equipment that need to be shock-resistant and anti-loosening, such as engines, ships, machine tools, etc. Especially in occasions with frequent vibrations and low friction coefficients, it is even more necessary to use lock washers.


As an important part of mechanical connectors, lock washers can prevent loosening, disperse loads, protect threads, and increase friction coefficients. When selecting lock washers, factors such as size, material, shape, and roughness need to be considered. Correct understanding and use of lock washers can improve the reliability and safety of machine or equipment connections and avoid unnecessary consequences caused by connection failure.


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