Types of Thread Inserts
Thread inserts provide permanent, high-quality, wear-resistant internal threads mainly designed to get installed in drilled holes or molded forms in a simple and quick way. In-fact there are many advantages of using thread inserts.
Depending on the application, Thread insert comes in various types and varieties.
Captive Nut: It comes into two basic styles, cage nut or clip-on nut. It is generally used to attach screws to sheet metal-parts too thin to be threaded. They can be attached, removed and reused with simple hand tools.
Externally Threaded Inserts: They have threads in the inside and outside of the insert. The insert is threaded into a pre-tapped hole or few inserts tap their own threads in a drilled or molded hole. Those inserts that are lock-via-friction or self-tapped are most commonly known by the trademarked names Tap-lock or Speedserts.
Helical Inserts: It is an insert made of coiled wire. These inserts are used to offer stronger threads in soft materials such as zinc die castings, magnesium, wood, aluminum etc. and provides a convenient means of repairing stripped-out threads.
Mold-in Inserts: They are internally threaded and have specially shaped outer diameter to anchor the insert in plastic. They can be heated and pressed into premade thermoplastics.
Press-fit Inserts: These are internally threaded and have knurled outer diameter. These are pressed into plain hole with an arbor press.
Potted Inserts: It refers to the application of epoxy to fix it to a panel like a sandwich panel or honeycomb which are often used in commercial aircraft.
Reasons to use Thread Insert:
Thread inserts are typically used for soft materials, however driving a screw or bolt directly into an object can cause lot of damage. Thread insert is placed inside the object after which threaded fastener is driven into the insert, making it easy for a screw or bolt to be driven all the way into it.
Depending on the application, Thread insert comes in various types and varieties.
Captive Nut: It comes into two basic styles, cage nut or clip-on nut. It is generally used to attach screws to sheet metal-parts too thin to be threaded. They can be attached, removed and reused with simple hand tools.
Externally Threaded Inserts: They have threads in the inside and outside of the insert. The insert is threaded into a pre-tapped hole or few inserts tap their own threads in a drilled or molded hole. Those inserts that are lock-via-friction or self-tapped are most commonly known by the trademarked names Tap-lock or Speedserts.
Helical Inserts: It is an insert made of coiled wire. These inserts are used to offer stronger threads in soft materials such as zinc die castings, magnesium, wood, aluminum etc. and provides a convenient means of repairing stripped-out threads.
Mold-in Inserts: They are internally threaded and have specially shaped outer diameter to anchor the insert in plastic. They can be heated and pressed into premade thermoplastics.
Press-fit Inserts: These are internally threaded and have knurled outer diameter. These are pressed into plain hole with an arbor press.
Potted Inserts: It refers to the application of epoxy to fix it to a panel like a sandwich panel or honeycomb which are often used in commercial aircraft.
Reasons to use Thread Insert:
Thread inserts are typically used for soft materials, however driving a screw or bolt directly into an object can cause lot of damage. Thread insert is placed inside the object after which threaded fastener is driven into the insert, making it easy for a screw or bolt to be driven all the way into it.
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