In the market, you will find diverse types of Key Lock insert, solid cylindrical lining style inserts that are threaded internally and externally and have sections or “keys” close to the top of the insert. These outside threaded inserts are helpful to allocate loads and repair or support threads against failures due to seizing, stripping, or corrosion.

Moreover, these Key-locking inserts are beneficial in high rotation and high-temperature situations and tenders where fastenings are frequently detached and reconvened. Key Lock inserts are also known as Keenserts and Keyserts, which are listed trademarks for the most popular product names for this part. Usually, they are applicable for electronic equipment, transmission housings, and suspension units. Key-locking inserts are commonly present in aerospace assemblies.

Let’s look at some of these locking inserts’ work styles, sizes, and pros and cons.

How does it work?

You thread the Key-locking inserts into a pre-tapped hole, and then the keys are hit into trenches through the threads, enduringly locking the insert in the dwelling. These key inserts are highly versatile and drive down into the tapped threads and deliver a mechanical lock compared to rotation, especially when the mating stud or bolt is frequently detached.

What materials, sizes, and styles are accessible?

Key-locking inserts are available in four basic main styles and trends. These styles are Miniature, Heavy Duty Wall (general purpose), Thin Wall, and Extra Heavy Duty.

  • Small Key-locking inserts are applicable for electronic and aerospace applications where size and forte are serious. These inserts fit in sheet material as thin as 1/16″.
  • Thinwall inserts have slighter external threads than typical heavy-duty inserts and are perfect for tight spaces where less pull-out strength is suitable.
  • Heavy Duty inserts have a large, heavy-duty thread wall, appropriate for most tenders.
  • Extra-heavy duty inserts are beneficial in large and overly worn dumps.
  • Key-locking inserts can be within or non-locking (the normal is non-locking and is adequate for most shared applications).

Benefits of Key Inserts:

Key inserts are perfect for when a high degree of the pull-out strong point is essential or when a screw will move in and out frequently. Unlike Helicoils, key inserts do not need a unique installation device, and there is no tang to eliminate.

Drawbacks of Key Inserts:

Despite multiple benefits, there are some drawbacks to these inserts. Key inserts are an excessive substitute to Helicoils, but they do have their own set of problems. The most common defect is the size essential to install critical inserts. Unlike Helicoils with a slim shape, inserts are extensive and require a sizeable external thread for fitting. The second drawback of using them is the elimination process. Removal needs drilling out material, twisting the key insert, and applying a screw extractor to remove the insert. It can be a cumbersome process and may prove to be more thought-provoking than removing a Helicoil. We think inserts are more valuable and practical than helicoils, but it is mainly contingent on your application.

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