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How to install a solid externally threaded insert?

How to install a solid externally threaded insert?

Shop for Threaded Inserts
installing solid externally threaded inserts There are two main methods for installing externally threaded inserts, they can either be threaded into a pre-tapped hole, or the insert can be self-tapping. These methods have several steps in common.

For all solid externally threaded inserts:

clear the threads with drill

Step 1 – Clear damaged threads

Find the correct size drill bit for the hole, fix it to a drill and use it to clear the existing damaged threads or create a new hole to be threaded.

For inserts requiring a countersink:

countersunk hole and chamfer tool

Step 2 – Countersink hole

Use a chamfer drill bit to countersink (create a dipped edge) around the hole, which houses the lip on the insert.

For none self-tapping inserts:

tapping the hole

Step 3 – Thread hole

Use the correct size tap and a tap wrench to thread the hole. Taps are wound in a clockwise direction to create the threads and unwound in an anti-clockwise direction to remove the tool.

It is vital to ensure you have the correct tap size. This also means knowing if you need regular or STI tap (Screw Thread Insert taps have a larger diameter to house inserts).

For all solid externally threaded inserts:

threaded insert on installation tool

Step 4 – Place insert on driver

Place the insert on an appropriate driver tool. This may be included with the inserts or available for purchase at the same time. It is also possible to use a nut and bolt with a spanner, on the self-tapping variety. All solid externally threaded insert are threaded onto the installation tool.

For non-self-tapping threaded inserts:

installing the threaded insert

Step 5 – Install insert

To install the insert, rotate the driver (with insert), in a clockwise direction into the hole. The threads on the insert will interlock with the newly tapped threads of the hole. Ensure the insert is wound just below the surface of the hole.

For self-tapping threaded inserts:

self-tapping threaded insert with bolt and nut driving tool

Step 6 – Install insert

The self-tapping insert is installed in a similar manner to the non-self-tapping one. The driver (or spanner) is rotated clockwise to install the insert. However, because the hole is not pre-threaded, a much greater force is required to form the threads as the insert is driven in.

For all solid externally threaded inserts:

 removing the installation tool from insert

Step 7 – Remove installation tool

The installation tool must be removed from the insert. To do so, rotate it in an anti-clockwise direction until free.

For externally threaded inserts with keys:

hammering in the keys on a threaded insert

Step 8 – Secure insert

The keys must be driven down to secure the insert. If a driver tool is included with the inserts, this will often have a feature which works as buffer between the keys and the hammer used to push them down. The keys are lightly tapped to finish.

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