The installation of expansion bolts is one of the most complicated of all threaded fasteners, so why use expansion bolts?Application of expansion bolts, pipe support as well as a variety of equipment can be fixed to the wall or on the top, and this kind of installation mode, is other bolts cannot be achieved, because thread fasteners only is to wear in the past, then tighten the nut using it can achieve the effect of locking, and the wall to form internal thread cannot directly to wear, and the bolts can be directly embedded within the walls, exposed part can directly tighten can achieve the purpose of locking.

Material of expansion bolt

There are two kinds of materials for expansion bolts: carbon steel, galvanized steel and stainless steel. Generally speaking, carbon steel expansion bolts are not classified, and there is only one kind of material, that is, conventional Q235 steel. If you really want to calculate the level, it is equivalent to about 6.8.And the most stainless steel expansion bolt is just SUS304 this kind of material, SUS316 stainless steel expansion is used less, so the major companies basically will not have a large amount of inventory.

Principle of expansion bolt

Expansion bolt is a theory of reverse force. Its design makes it very convenient to disassemble and assemble in bolt environments that are impossible to apply.

Its tapered end can turn the expansion pipe up slowly, bear the weight of the fundamental need to tighten reverse nut, so an expansion bolt quality, with the expansion pipe material and the thickness has a lot to do, why we often say that national standard, the national standard here is actually want to explain.

we use the expansion pipe material and thickness are in strict accordance with national standards for production, but also is the diameter of the thread can pass check gauge testing, and some unscrupulous vendors in order to save the cost, the materials used are substandard.

Bolts can be removed at any time, when installation, choose a like expansion pipe specifications of the drill bit, on the wall a length and expansion bolt hole deep, clean up the dust within the hole, into the expansion bolt, and then will need parts on the exposed screw thread, then plain washers, spring washers and nuts in turn mount, then tighten the nut.

In some installation environments, the wall is used with hollow bricks, so in this case, it is not suitable for this operation process, because the reverse force of the hollow brick is not large enough, and the brick body is directly crushed when the nut is tightened.

So when we meet the wall of hollow brick, we need to change the installation steps. After the drill hole is made, fill the hole with some quartz mortar of high viscosity and high hardness, and then put the expansion bolt into it and install it after it solidifies.