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A thread insert is a tool in the shape of a coil that can be used to improve the strength of the screw or repair the screw by placing it in the screw.
To use threaded inserts, you need a internal thread to insert the threaded inserts. The internal thread is called the insert screw. In order to process insert screws, a special drill and screw Tap for Tap and Pilot hole are required. The processing procedure is carried out in the following order:
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| An insert screw is a internal thread for inserting a "screw insert". Compared to the original thread size, the outer diameter is large while the pitch remains the same. Requires special tools. It can also be processed with a thread mill. Pilot hole The diameter is different from that of ordinary screws. | A threaded insert is a coiled tool that reinforces a internal thread . It may also be expressed as an insert, helisert, or spruce. Using an insertion tool, hold the part called the tongue and place it in the insert screw. The image is a product called "E-Cert". There is also a product called a tongueless insert that does not have a tongue. |
(1) Drilling ( Pilot hole of insert threads)
Insert screws have a larger outer diameter than regular screws because the coil is inserted. The pitch is the same. The Pilot hole of the insert screw is different from the normal thread.
When drilling into aluminum or resin, we recommend the EX-SUS-GDS high-speed drill for stainless steel.
(2) Tap machining (cutting insert threads with Tap for insert threads)
The Tap of the insert screw has "HL" in the part name. (A-SFT HL) Insert threads can also be machined with thread mills. When calculating the cutting data of Tap , refer to the number () next to the thread size in the Pilot hole table for the Tap outer diameter.
(3) Tap Inspection (Inspect the insert screws.) Thread Tap is used for insert screws. ）
Tap Inspection should be performed using the Thread Precision Insert Thread Dedicated Thread Tap (HL-LG) in the drawing instructions before inserting the thread insert.
Pass/fail judgment: Pass if the through hole passes and the stop side does not enter more than 2 turns.
(4) Inserting the insert (insert)
You will need three things: an insert screw, an insertion tool, and a folding tool.
・ E-Cert insertion, folding, and extraction tools
Threaded inserts can be selected according to the thread length. Choose from the effective thread length in the drawing instructions. An insertion tool is required for each thread size. There are manual and electric types. The electric type can be equipped with a manual type insertion tool attached to the tip for efficient work. At the same time, a folding tool is also required to remove the tongue after insertion. Basically, it is not necessary, but if you want to extract it for some reason, you will need a special extraction tool.
Please note that depending on the insert manufacturer, the procedure may be different.
How to insert a threaded insert
(1): Insert on the insertion tool
(2): Insert
(3): Remove the insertion tool
(4): Remove the tongue with a folding tool
completion
