How to reduce the probability of car screws loosening

Car screws are mainly used to connect internal components and structures of a vehicle. Since the use of a car is closely related the personal safety of its passengers, it is extremely dangerous if a car screw loosens without any preventive measures. Therefore, for car designers and manufacturers, reducing the impact caused by loosening screws is something they must do before bringing every car model to the market.

First: Ensure elasticity

Screws used on cars are always used in conjunction with spring washers. most basic requirement for them is to have good elasticity and appropriate dimensions. This way, if a screw loosens, the degree and impact of the loosening can be mitigated through the between the screw and the spring. Although spring washers are relatively inexpensive, their function is immense, especially in car manufacturing, where they are an indispensable part. Their good elastic deformation capability is prerequisite for ensuring that screws do not loosen easily. Therefore, when installing screws and spring washers, in addition to checking whether the screw threads are intact, the elasticity of the spring washer must be checked to ensure it is effective.

Second: Use of cotter pins

The use of cotter pins is also to prevent car screws from loosening or even falling off., not all car screws can use cotter pins. Generally, cotter pins are more commonly used for large-head screws in the engine area. When using cotter pins, appropriate length must be selected. Because the engine is in a high-speed rotating state while the car is driving, if the cotter pin is too long, it will collide with crank arm and then be sheared off. If this situation is not discovered in time, the cotter pin will fall off completely after a short while, causing the screw to lose its and eventually loosen over time. Therefore, when using cotter pins, on one hand, the length must not exceed the width of the screw by too much, and on the other, it must be inserted into the cotter pin hole of the screw and secured with a tool. Only in this way can it be guaranteed that the screw will not loosen even under-speed operation.