How to correctly install and use expansion screws

1. Expansion screws to the ground or wall holes, with a wrench to tighten the expansion bolts on the nut, bolts outward, but the outside of the metal sleeve is not moving, so the bolt under the big head of the metal sleeve rose open, so that it rises full of holes, at this time, the expansion bolts can not be pumped out

2. Expansion screws are to make the air duct support, hanging, brackets are fixed to the wall, floor, columns, a special threaded connectors. A special threaded connector. By countersunk head bolts, expansion tube, flat washers, spring washers and hexagonal nuts. When used, the first impact drill (hammer) in the fixed body of the corresponding size of the hole, and then the bolt, expanding the tube into the hole, tighten the nut can make the bolt, expanding the tube, the mounting parts and the fixed body between the expansion of the body as a whole.

3. Expansion screws of the principle of fixing: expansion screws of the fixed is to use the slope to promote the expansion of the friction generated by the friction grip, to achieve the fixed effect. One end of the screw is threaded, one end of the vertebrae. Outside the bread a tin, tin cylinder half of a number of cuts, thia them together into the wall into a good hole, and then lock the nut, the mother of the screws to pull outward, the vertebral degree pulled into the tin cylinder, tin cylinder was open, and then firmly fixed in the wall,