Key Locking Insert Application: What it is and Why it's Important
Key locking inserts are mechanical solutions designed for preventing unwanted rotation or loosening of bolts, screws, or studs even in extreme environments. These inserts are used in a wide variety of applications ranging from aerospace, military, and automotive industries to marine and offshore applications.
The key locking insert application involves the use of an insert which is first drilled and tapped into a pre-threaded hole. The insert is then installed with a special tool equipped with a locking key, engaging with the threads of the insert to create a positive torque lock preventing the fastener from backing out. The locking key is what gives key locking inserts their distinct name, and helps to ensure secure fastening even in high-vibration or high-temperature environments.
Key locking inserts are important for many reasons. One of the main advantages of using these inserts is that they provide a permanent solution to thread wear and stripping, and can even be used in materials with low thread strength such as aluminum and magnesium alloys.
Other benefits include:
1. Enhanced fatigue strength due to locking function
2. Consistent clamp load distribution resulting in improved joint quality
3. Improved thread seal preventing fluid or gas leaks
4. Reusability
The application of key locking inserts can be done through either an in-situ installation method or an insert assembly method. In-situ installation involves installing the insert directly into the pre-threaded hole where it will remain permanently, whereas the insert assembly method involves installing the insert into a sleeve and subsequently inserting the assembly into the pre-threaded hole.
Some of the most common applications of key locking inserts include:
1. Aerospace applications: Key locking inserts are often used in aerospace applications to provide secure, permanent fastening in high-vibration environments. They are also used to reinforce damaged threads.
2. Military applications: Key locking inserts are used in military applications to prevent loosening of fasteners and to allow for easy repair in the field.
3. Automotive applications: Key locking inserts are used to improve the reliability of automotive fasteners, particularly in areas such as engine blocks and transmission housings.
4. Marine and offshore applications: Key locking inserts are often used in marine and offshore applications to prevent unforeseen loosening of bolts and screws in harsh saltwater environments.
In conclusion, key locking inserts are essential mechanical solutions for ensuring secure and reliable fastening in a variety of applications. Whether it be aerospace, military, automotive, marine or offshore applications, key locking inserts offer resilient, permanent and effective solutions to the challenges of fastening in extreme environments.