Threaded inserts are ideal for reinforcing threads when a bolt or stud is frequently installed and removed. Using a threaded insert does not diminish a hole's hold strength.
When used correctly, threaded inserts provide a strong, durable solution for threads within weaker materials. The use of threaded inserts can extend the life of a hole by using metal threads.
Threaded inserts can be installed with special installation tools, which come in handy to ensure a perfect installation. These installation tools serve both as a wrench to quickly thread the insert into its tapped hole as well as an impact tool for driving lock keys.
Learn how to install these tooling components with or without these tools in this guide. Just follow the step-by-step instructions below.
Threaded Inserts Installation Process
Drill Out Internal Threads
The first step is to drill the right sized hole to support the threaded insert. If this is a new workholder, you will need to drill the correctly sized hole. If you are replacing old internal threads with a threaded insert, you will want to drill out those threads.
Carr Lane Mfg. product pages provide tables specifying the correct tap drills to use for your threaded inserts.
Countersink to Correct Diameter
Countersink diameter refers to the final diameter of the hole after drilling measured from the top of the service. This can range from 1/3 of an inch for a thinwall threaded insert to nearly two inches for a heavy duty threaded insert. You will want to refer to product tables to determine the correct countersink diameter for your application.
Tap New Threads Using A Standard Tap
Standard taps are used to cut threads into the drilled hole.
Screw In The Threaded Insert
Screw in the insert until its body is slightly (.010 to .030 inches) below the surface. This is performed either by hand or using the installation tool. Installation Keys act as a depth stop.
Drive the keys down with several light hammer taps using the installation tool. If no installation tool is available, use a drive tool directly on the keys.
How to Remove Threaded Inserts
Just like installing, removing our threaded inserts is also a simple process. Below shows the steps of removing threaded inserts.
Drill Out Locking Keys
Use the specified drill diameter and depth to drill out the locking key. Refer to product information to determine the correct drill size.
Deflect Keys Inward and Break Off
This will loosen the threaded insert and make it easier to remove.
Remove The Insert
Use an E-Z type tool to slowly remove the threaded insert.
Screw Replacement Into Pilot Holes
If done correctly, the parent material will not be damaged.