How to install expansion screws

1. After driving the expansion screw into the hole on the ground or wall, use a wrench to tighten the nut on the expansion bolt, the bolt goes out, but the outer metal sleeve does not move, so the big head under the bolt will increase the metal sleeve. open, so that it fills the entire hole, at this time, the expansion bolt cannot be pulled out

2. The expansion screw is a special threaded connection used to fix the air duct support, hanger and bracket on the wall, floor and column. It consists of countersunk head bolts, expansion tubes, flat washers, spring washers and hexagon nuts. When using, you must first use an electric impact drill (hammer) to drill holes of the corresponding size on the fixed body, then install the bolts and expansion tubes into the holes, and tighten the nuts to expand the gaps between the bolts, expansion tubes, installation parts and the fixed body. tightly into one.

3. The fixation principle of the expansion screw: The fixation of the expansion screw is to use the slanted slope to promote the expansion to generate frictional gripping force to achieve the fixing effect. One end of the screw is threaded, and the other end has a vertebral degree. There is a sheet of iron on the outside, and half of the iron cylinder has several incisions. Put them into the hole made in the wall, then lock the nut, and Luo Mu pulls the screw out and pulls the vertebra into the iron cylinder. swelled, so firmly fixed to the wall,