KernalCoil wire-thread inserts are the optimum solution in the field of standard applications. The range of use extends from connections repeatedly disconnected to the reconstruction of damaged threads. This threaded insert simplifies installation considerably for the user. Thanks to its optimised conception the KenalCoil Thread Insert  is very easy to turn in and install.

Restoring Stripped Threads
They are used to reinstate threads that have become damaged or stripped. This is crucial in maintaining the functionality of components that rely on threaded connections.

Creating Sturdier Threads in Weak Materials
Wire thread inserts are especially beneficial when creating more robust threads in relatively weak materials such as aluminium. Aluminium is widely used in various industries due to its low weight, but its inherent softness can make the original threads prone to damage. By installing wire thread inserts, the strength of the threaded area is significantly enhanced.

Wire thread inserts are most commonly employed to reinforce the threads in OEM (Original Equipment Manufacturer) castings and machined parts made from lightweight yet intrinsically weak materials. Aluminium is by far the most frequently used material in this context.

They are also sold in the form of thread repair kits, which come complete with installation tools, drills, and taps. These kits offer an all - in - one solution for restoring threads, enabling the component to once again accept the original bolts. These products are highly popular in the automotive aftermarket and the mechanical industry for thread repairs.

Using them can help avoid the high costs associated with replacing entire components, making them a cost - effective and practical choice for maintaining machinery and vehicles.

When a wire is wound into a helical coil and installed into a threaded hole, it forms a permanent and wear - resistant thread within the base material. Generally, the strength of this new thread is 20% higher than that of the original thread.

The designed diameter of the insert is larger than the tapped hole. During installation, the insert is compressed. This allows for maximum surface contact area with the tapped thread, ensuring the insert is securely and permanently fixed in place. The compensating effect of the insert enables the entire bolt and hole to share the load, thereby enhancing the pull - out and torque output strength. With Recoil inserts, the load and stress can be more evenly distributed across the entire component.

As a result, the stress concentration issues that typically occur when using solid inserts in the parent material no longer exist. Recoil inserts can adjust their radial and axial dimensions in response to any expansion or contraction of the parent material.

Normally, threads generated directly in the material can lead to the following problems:

· Limited contact points

· Poor side contact between the bolt and the parent thread

· Uneven distribution of bolt load on the engaged threads

· Failure of threaded components under stress (especially in aluminum and other weaker metals)

1. Drilling
Drill holes with a drill bit of the size specified in the wire thread insert parameter table. Pay attention not tdrill the counterbore into a conical shape. The chips generated during drilling should be blown out withcompressed air. After drilling, the depth of the counterbore should not exceed 0.4 pitches. An over-sizedhole is not conducive to the screwing in of the wire thread insert.

2. Tapping
Use a special tap for wire thread inserts to tap the thread. The tapping depth must exceed the installationlength of the wire thread insert. For the threaded hole after tapping, use a compressed air spray gun toblow out the chips. When high precision of the thread is required, use a special bottom hole plug gauge for wire thread inserts to check the tapped thread.

3. Installation

Put the wire thread insert into the installation wrench. insert the installation tailshank of the wire thread insert into the quide rod groove of the installation wrench. Rotate the handle of theinstallation wrench to screw the wire thread insert into the threaded hole. For the installation of coarse-pitchwire thread inserts with a specification of M14x2 and above, a simple "T"-shaped slotted tool can be used forinstallation.
Note: During the process of screwing in the wire thread insert, there should be no pressing action in thevertical direction to prevent thread skipping and cross-threading. The correct method is to slowly screw it inalong the direction of thread rotation.

4. Removal Tang

Use a staking tool to break off the installation tail shank. Strike the staking tool with a hammer weighing about 200 grams instantaneously, and the tail shank can be removed. Do not reverse the installation wrench to break off the installation shank. In this case, it is very likely to cause the broken part of the tail shank to deform and produce burrs, and in some cases, the wires may even be pulled out, which will affect the passage of the thread plug gauge or the bolt.

5. Remove harness

When installation problems occur during the installation of wire thread inserts (such as thread skipping), and it is necessary to remove the insert, a special insert extractor should be used to perform the removal operation on the wire thread insert.