Q:How much is a screw?

If the inside of the screw is not the same specifications, the same material, even if not how much money out of a.

Q:I am a trainee apprentice, recently encountered a problem, that is, some screws are screwdriver screwdriver or hexagon turned no thread. Can not buckle, only in the inside idle. What is the general use of this situation to open it? Thank you, more urgent.

Next time do not move do not stand with stupid. Dripping hair dynamic ah. As for how to do bad bad. Others have already said

Q:There are some screws, is installed in the electrical, power, electronic products on the material, ask how to correctly install the screws?

After we understand the characteristics of the screw, we can proceed to the next step. For example, we use the hands of a 8.8-wide hexagonal screws, then we have mastered the 8.8 hexagonal screws, the use of screws can be used to wipe some of the oil, so that we can protect the screws, in the invisible Which extended the life of the screw. And we have to use the 8.8-grade hexagon screw in the process, we will be able to know that we need to properly protect the screw head inside the hexagon, to prevent 8.8 grade hexagon screw skid, because we know 8.8 grade hexagon screw More difficult to take out. Then we can think of this screw should be used in what place? We can not put a small number of digital screws on the large industrial above, so that the screws can not withstand the pressure of large industrial above, so we need is to help the screw to choose a suitable place, so the screw on the matter The value of the.

Q:Is the tail screw? If it is mainly used in what place? If not what are they different?

This kind of screw called what I really do not know its name, the use of the place to see really not much, I see the place are generally used in machinery and equipment above, as you said what role, my personal point of view is To prevent slipping, because it is the head of a large slip wire, need to hand to adjust to the correct position to fall off, know that so much, not professional, Oh ~ hope to help you! The

Q:What is the meaning of the 8.8 on the screw

Alina: refers to the strength of the thread level, the decimal point in front of the tensile strength, 8 is 800MPa, 10 is 1000MPa, the decimal point behind the value of the yield limit and the tensile limit ratio, .8 is 0.8.

Q:How is the screw produced

Annealing: the wire heated to the appropriate temperature, to maintain a certain time, and then slowly cooling to adjust the crystal structure, reduce hardness, improve the room temperature processing. Pickling: Remove the oxide film on the surface of the wire and form a layer of phosphate film on the metal surface to reduce the wire drawing and cold pier or forming process. To the required diameter. Practical for some products can be divided into coarse pumping (shelling) and fine pumping two stages. Molding: The wire is forged by cold forging (or hot forging) to achieve the shape and length (or thickness) of the finished product. The finished semi - finished product is rolled or tapped to achieve the desired thread. Practical for the bolt (screw) known as the rolling teeth, teeth known as the rolling teeth, nuts called tapping. Heat treatment: according to the object and the purpose of different different heat treatment can be used. Quenched and tempered steel: quenched high temperature tempering (500-650 ℃) spring steel: quenched after tempering temperature (420-520 ℃) ??carburizing steel: carburizing after quenching and then low temperature tempering (150-250 ℃) low carbon and In the carbon (alloy) steel quenched into martensite, with the tempered temperature rise, the general rule is the strength decreased, while the plasticity, toughness rise. Surface treatment: surface treatment that is through a certain method in the workpiece surface coating process, the purpose is to give the product surface appearance, anti-corrosion effect.

Q:Also known as screw nails, I want to nail on the board, but there is no way to nail into the hard, how nail?

1, first clear the broken screw on the surface of the sludge with the center of the center of the gun will be killed by the center of the drill and then drill with a diameter of 6-8 mm drill bit in the center of the drill hole drilling, pay attention to the hole must drill through. After the hole is drilled, remove the small drill bit and replace the drill with a diameter of 16 mm. Continue to expand the hole of the bolt and drill it through. 2, take the diameter of 3.2 mm below the use of small and medium current in the broken bolt in the drilling from the inside to the outside of the surfacing welding site to take the beginning of the bolt half of the length of the bolt can not start too long So as to avoid breaking the outer wall of the broken bolt. Surfacing to the upper end of the broken bolt and then continue to pile out a diameter of 14-16 mm high 8-10 mm cylinder. 3, after welding with a hand hammer hammer its end point so that the broken bolt along its axial vibration.As the previous arc heat and subsequent cooling coupled with the vibration at this time will break the bolt and the body of the thread Between the resulting loosening. 4, carefully observed when you find a trace of rust after the break from the fracture when you can take the M18 nuts in the surfacing stigma and the two welding. 5, after welding with a cool hot plum wrench on the nut around the back and forth twist can also be back and forth twist side with a small hammer hammer the end of the nut so that you can remove the bolt off. 6, remove the broken bolt with the appropriate tap to the fabric within the rack to remove the hole to remove the rust and debris.

Q:Why a screwdriver can suck the screw

Because the top of the screwdriver with magnetic junior high school there

Q:Engineering argument, usually referred to as the M3 screw, M refers to what is the meaning? The Please instruct the engineering staff.

M is the large diameter of the screw, the diameter of the screw top of the bolt, or the diameter of the screw bottom of the nut

Q:What is a self-tapping nail? Is it used? What are the characteristics of the shape? What is the difference with ordinary screws?

Self-tapping screw head shape with round head, flat head, semi-countersunk head and countersunk head and so on. Materials generally carburized steel, heat treatment after the surface hardness of not less than 45HRC.