DongGuan ShiYi Metal manufacturing LTD
Expansion Bolts are made of countersunk head bolts, expansion tubes, flat washers, spring mats and hex nuts.
Expansion of the expansion of the screw principle: the expansion of the screw is fixed using the pull out of the slope to promote the friction caused by friction, to achieve a fixed effect. The screw is a thread, one has a vertebral degree. Outside the package a metal, metal cylinder half of a number of incision, put them together thrown into the hole on the wall, and then lock the nut, the nut pulled out the screw, the vertebral pull into the metal cylinder, metal cylinder was up Open, so tightly fixed on the wall, generally used for fence, rain Peng, air conditioning and other cement, brick and other materials on the fastening. But its fixation is not very reliable, if the load has a greater vibration, may be loose, it is not recommended for the installation of ceiling fans and so on.
Expansion of the bolt is the principle of the expansion bolts hit the hole in the ground or wall, with a wrench to tighten the nuts on the expansion bolts, bolts to go out, while the outside of the metal sleeve is not moving, so the bolt under the bulk of the put Metal sets up to make it full of holes, this time, the expansion bolts on the pumping out.