Expansion screw installation method

Expansion screw installation method
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 open the metal sleeve, Make it fill the whole hole, at this time, the expansion bolt cannot be pulled out
Expansion screw is a special threaded connection used to fix 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 impact drill (hammer) to drill holes of the corresponding size on the fixed body, then put the bolts and expansion tubes into the holes, and tighten the nuts to expand the bolts, expansion tubes, installation parts and the fixed body. tightly into one.​​
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. 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. Luo Mu pulls the screw out, and pulls the vertebra into the iron cylinder. When it is opened, it is tightly fixed on the wall. It is generally used for the fastening of guardrails, awnings, air conditioners, etc. on cement, bricks and other materials. However, its fixation is not very reliable. If the load has a large vibration, it may loosen, so it is not recommended for installing ceiling fans.
1. First prepare tools, such as electric drill, etc.
2. Select an alloy drill bit with the same diameter as the expansion screw expansion ring (tube), install it on the electric drill, and then drill the wall. The depth of the hole is preferably the same as the length of the bolt, and then put the expansion screw kit together into the hole. , Remember; do not unscrew the screw cap, to prevent the bolt from falling into the hole when the hole is drilled deeper, and it is not easy to take it out.
3. After tightening the screw cap by 2-3 buttons, feel that the expansion bolt is relatively tight and not loose, then unscrew the screw cap, and then align the fixing piece with the hole on the fixed item to the bolt and install the outer pad. A plate or a spring washer can be used to tighten the screw cap.
4. As shown in the picture, punch 10MM holes for 6MM; punch 12MM holes for 8MM, and punch wall holes according to the outer diameter of the expansion tube. If the brick wall is soft, choose a smaller drill bit. The expansion pipe part should all enter the wall, as long as the threaded part is long enough, the deeper the casing part is, the stronger it is.
5. The diameter of the drilled hole is as follows:
M6 series expansion screw drilling is 8mm;
M8 series expansion screw drilling is 10mm;
M10 series expansion screw drilling is 12mm;
M12 series expansion screw drilling is 14mm;
By analogy, the diameter of the belt hole is 2mm larger than the diameter of the screw
Extended information:
1. Drilling depth: The relevant information describes the length of the expansion pipe, but I found that this depth is not enough in the specific construction, which may be related to the residual amount of debris in the hole, so you'd better be 5 mm deeper than the length of the expansion pipe about. As long as you are greater than or zinc alloy anchor factory equal to the length of the expansion pipe, the length of the expansion bolt left in the ground is equal to or less than the length of the expansion pipe.
2. The requirement of expansion bolts on the ground is, of course, the harder the better, which also depends on the stress of the objects you need to fix. Installation in concrete (C13-15) is five times stronger than in brick.
3. After a M6/8/10/12 expansion bolt is correctly installed in the concrete, its least ideal maximum static force is 120/170/320/510 kg, respectively.