Wire thread insert installation steps and use of wire thread inserts

The installation method of wire thread inserts mainly includes the following four steps: First, drill hole two, tapping three, install four, go tail handle four steps. The strict installation procedure of wire thread inserts is also required after the second step of tapping, with the special wire thread insert bottom hole plug gauge to test the bottom hole of the tapping tooth, and the pass can be made through The next step is to install the wire thread inserts. In addition, the poorly installed wire thread inserts can be removed by using a special removal tool—the unloader.
1 Drilling

Steps for installing wire thread inserts Step 1 - Drill holes Drill holes using the standard drills listed in the table. The drilling depth is greater than or equal to the mounting depth of the wire thread inserts. Take care not to drill the holes into cones and do not drop them. After drilling, the boring hole should not exceed 0.4 pitch depth, because too large boring hole is not conducive to thread screw threading.
Use the standard drill bit listed in the table to drill a hole with a depth greater than or equal to the depth of the wire bushing installation; be careful not to drill the hole into a cone and do not drop the chip. After drilling, the boring hole should not exceed 0.4 pitch depth, because too large boring hole is not conducive to thread screw threading.

Thread size drill diameter (mm)
Thread size drill diameter (mm)

M2x0.4
2.1
M8x1
8.3

M2.5x0.45
2.6
M10x1
10.3

M3x0.5
3.1
M10x1.25
10.3

M4x0.7
4.2
M12x1.25
12.3

M5x0.8
5.2
M12x1.5
12.4

M6x1
6.3
M12x1
12.3

M7x1
7.3
M13x1.25
13.3

M8x1.25
8.3
M14x1.5
14.4

M10x1.5
10.4
M14x1.25
14.3

M11x1.5
11.4
M16x1.5
16.4

M12x1.75
12.4
M18x1.5
18.4

M14x2
14.5
M20x1.5
20.4

M16x2
16.5
M20x2
20.5

M18x2.5
18.6
M22x2
22.5

M20x2.5
20.6
M22x1.5
22.4


2 tapping

The second step of the wire thread insert installation step is the tapping of the wire thread inserts marked with the specified thread specifications. The length of the tapping must exceed the length of the wire thread inserts. For the through holes, all tapping must be performed; the tapping accuracy To determine the tolerance range of the screw hole in the final standard, the user should select the tapping method and lubrication appropriately. The blind hole tapping should be used with proper force to avoid breaking the tap. After tapping, the tapped hole should be cleaned and generally blown with a compressed air gun. When using the blind hole, a long gun with a radial hole should also be used to clean it from bottom to top, or the tapped hole can be cleaned by cleaning. When the precision of the threaded hole is high, the special wire thread insert bottom hole plug gauge is used for inspection.


3 Installation

The third step of the wire thread insert assembly operation is to use a special wrench for wire thread inserts to install the wire thread inserts under normal circumstances. Insert the wire thread insert into the installation tool, insert the handle into the guide rod groove, rotate the handle of the installation tool, screw the wire thread insert into the screw hole, and leave 0.25-0.75 laps of empty thread from the surface. When installing a small amount of wire thread inserts and M14×2 or more coarse tooth wire thread inserts, simple tools such as “T”-type notch or thread head can be used for installation. Be careful not to apply large axial force on the wire insert sleeve. To prevent "disordered buckle." After the wire thread insert is installed, in order to check the accuracy level of the standard internal thread hole formed, the corresponding level plug gauge can be used for inspection.

4 to handle

The fourth step of the wire thread insert assembly operation is to remove the tail thread on the wire thread insert with broken groove. After screwing in the screw hole, the mounting handle should be removed. The handle tool is needed. When the through hole is to be broken, it is necessary to break the wire thread sleeve mounting shank. Normally, use a punch to align the mounting shank. Use about 200g of boring head and tap it to remove. For M18×2.5 or larger coarse teeth thread inserts and M14×1.25 The above fine thread thread inserts can be broken by bending the mounting handle up and down with needle-nose pliers, and then the broken mounting handle can be removed from the screw hole.

The installation method of wire thread inserts mainly includes the following four steps: First, drill hole two, tapping three, install four, go tail handle four steps. The strict installation procedure of wire thread inserts is also required after the second step of tapping, with the special wire thread insert bottom hole plug gauge to test the bottom hole of the tapping tooth, and the pass can be made through The next step is to install the wire thread inserts. In addition, the poorly installed wire thread inserts can be removed by using a special removal tool—the unloader.
1 Drilling

Steps for installing wire thread inserts Step 1 - Drill holes Drill holes using the standard drills listed in the table. The drilling depth is greater than or equal to the mounting depth of the wire thread inserts. Take care not to drill the holes into cones and do not drop them. After drilling, the boring hole should not exceed 0.4 pitch depth, because too large boring hole is not conducive to thread screw threading.
Use the standard drill bit listed in the table to drill a hole with a depth greater than or equal to the depth of the wire bushing installation; be careful not to drill the hole into a cone and do not drop the chip. After drilling, the boring hole should not exceed 0.4 pitch depth, because too large boring hole is not conducive to thread screw threading.

Thread size drill diameter (mm)
Thread size drill diameter (mm)

M2x0.4
2.1
M8x1
8.3

M2.5x0.45
2.6
M10x1
10.3

M3x0.5
3.1
M10x1.25
10.3

M4x0.7
4.2
M12x1.25
12.3

M5x0.8
5.2
M12x1.5
12.4

M6x1
6.3
M12x1
12.3

M7x1
7.3
M13x1.25
13.3

M8x1.25
8.3
M14x1.5
14.4

M10x1.5
10.4
M14x1.25
14.3

M11x1.5
11.4
M16x1.5
16.4

M12x1.75
12.4
M18x1.5
18.4

M14x2
14.5
M20x1.5
20.4

M16x2
16.5
M20x2
20.5

M18x2.5
18.6
M22x2
22.5

M20x2.5
20.6
M22x1.5
22.4


2 tapping

The second step of the wire thread insert installation step is the tapping of the wire thread inserts marked with the specified thread specifications. The length of the tapping must exceed the length of the wire thread inserts. For the through holes, all tapping must be performed; the tapping accuracy To determine the tolerance range of the screw hole in the final standard, the user should select the tapping method and lubrication appropriately. The blind hole tapping should be used with proper force to avoid breaking the tap. After tapping, the tapped hole should be cleaned and generally blown with a compressed air gun. When using the blind hole, a long gun with a radial hole should also be used to clean it from bottom to top, or the tapped hole can be cleaned by cleaning. When the precision of the threaded hole is high, the special wire thread insert bottom hole plug gauge is used for inspection.


3 Installation

The third step of the wire thread insert assembly operation is to use a special wrench for wire thread inserts to install the wire thread inserts under normal circumstances. Insert the wire thread insert into the installation tool, insert the handle into the guide rod groove, rotate the handle of the installation tool, screw the wire thread insert into the screw hole, and leave 0.25-0.75 laps of empty thread from the surface. When installing a small amount of wire thread inserts and M14×2 or more coarse tooth wire thread inserts, simple tools such as “T”-type notch or thread head can be used for installation. Be careful not to apply large axial force on the wire insert sleeve. To prevent "disordered buckle." After the wire thread insert is installed, in order to check the accuracy level of the standard internal thread hole formed, the corresponding level plug gauge can be used for inspection.

4 to handle

The fourth step of the wire thread insert assembly operation is to remove the tail thread on the wire thread insert with broken groove. After screwing in the screw hole, the mounting handle should be removed. The handle tool is needed. When the through hole is to be broken, it is necessary to break the wire thread sleeve mounting shank. Normally, use a punch to align the mounting shank. Use about 200g of boring head and tap it to remove. For M18×2.5 or larger coarse teeth thread inserts and M14×1.25 The above fine thread thread inserts can be broken by bending the mounting handle up and down with needle-nose pliers, and then the broken mounting handle can be removed from the screw hole.