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1. Drilling depth: It is best to be about 5 millimeters deeper than the length of the expansion pipe

2. The requirement for expansion bolts on the ground is, of course, the harder the better, which also depends on the force situation of the object you need to fix. The stress strength installed in concrete (C13-15) is five times higher than that in bricks.

3. After correctly installing an M6/8/10/12 expansion bolt in concrete, its ideal maximum static stress is 120/170/320/510 kilograms, respectively. (Note that vibration can cause bolts to loosen)

Installation steps

1. Select an alloy drill bit that matches the outer diameter specification of the internal expansion bolt, and then drill according to the length of the internal expansion bolt. Drill the hole to the depth you need for installation, and then clean the hole thoroughly.

2. Install the flat washer, spring washer, and nut, rotate the nut to the bolt and end to protect the thread, and then insert the inner expansion bolt into the hole.

3. Turn the wrench until the washer is flush with the surface of the fixture. If there are no special requirements, tighten it by hand and then use the wrench for three to five turns.

matters needing attention

1. Drilling depth: It is best to have a depth of about 5 millimeters deeper than the length of the expansion pipe during specific construction. As long as it is greater than or equal to the length of the expansion pipe, the length of the internal expansion bolt left underground is equal to or less than the length of the expansion pipe.

2. The requirement for internal expansion bolts on the ground is, of course, the harder the better, which also depends on the force situation of the object you need to fix. The stress strength installed in concrete (C13-15) is five times higher than that in bricks.

3. After correctly installing an M6/8/10/12 internal expansion bolt in concrete, its ideal maximum static stress is 120/170/320/510 kilograms, respectively.

The installation method of internal expansion bolts is not very difficult, and the specific operation is as follows:; Firstly, select an alloy drill bit with the same diameter as the expansion screw tightening ring (pipe), install it on the electric drill, and then drill holes on the wall. The depth of the hole should be the same as the length of the bolt, and then insert the expansion screw kit into the hole together, making sure to remember; Do not unscrew the screw cap to prevent the bolt from falling into the hole and making it difficult to take it out when drilling deeper. Then tighten the nut 2-3 times and feel that the internal expansion bolt is relatively tight and not loose before unscrewing the nut.