How to remove key locking insert safely and efficiently ?

Key locking inserts are widely used in industries to increase the durability and strength of threaded holes. However, there may be instances where it is necessary to remove these inserts, such as when repairing or modifying the assembly. In this article, we will discuss how to remove key locking inserts safely and efficiently.
Step 1: Identify the Type of Key Locking Insert
Before removing the insert, it is essential to identify its type correctly. There are two types of key locking inserts: self-locking and non-self-locking inserts. Self-locking inserts have locking keys that are bent inward, providing a tight grip on the thread. On the other hand, non-self-locking inserts have straight locking keys that can be removed with pliers.
Step 2: Remove Non-Self-Locking Inserts
Non-self-locking inserts are easier to remove, and you can follow the steps below:
– Insert a pair of pliers into the locking keyholes and gently twist the pliers to loosen the insert.
– Move the pliers in a circular motion while pulling out the insert.
– The insert should come out with relative ease, and you may need to use a tap wrench to get it out.
Step 3: Remove Self-Locking Inserts
Self-locking inserts require a bit more effort to remove, and we recommend following these steps:
– Use a suitable punch to drive the locking keys outward gently.
– Ensure that you hit each key at an equal distance from its center to avoid damaging the thread or insert.
– Once all the locking keys are removed, use a tap wrench to back out the insert.
Step 4: Remove Damaged Inserts
If the key locking insert is damaged or broken, you may need to follow these steps:
– Remove any remaining locking keys using pliers or a suitable punch.
– If the insert is stuck, apply heat using a torch or heat gun to expand the insert and break the bond with the hole.
– Apply a penetrating oil to the insert and allow it to soak for 10 to 15 minutes.
– Use a tap wrench and try to back out the insert.
Step 5: Inspect the Hole
After removing the insert, inspect the hole for any damages or debris. Clean the hole thoroughly with a tap or brush to remove any dirt, particles, or foreign objects.
Removing key locking inserts can be a challenging task, but with proper preparation, tools, and techniques, it can be done safely and efficiently. Whether you are working with non-self-locking or self-locking inserts, it is essential to identify their type and follow the appropriate steps to avoid any damage to the threads or holes. Remember to inspect the hole after removing the insert and clean it thoroughly before installing a new insert.