САМОРЭДРУВАЛЬНЫЯ ВІНТЫ

Self-drilling screw is a kind of fastener which combines the functions of drilling and thread cutting, and is widely used in many fields such as architecture, furniture manufacturing, metal processing and so on. The following are the main advantages of self-drilling screws.

Convenient installation, time-saving and labor-saving: traditional screws need to be drilled before installation, while self-drilling screws can directly drill holes and tap on the surface of materials, greatly simplifying the construction steps. The use of extra tools is reduced, and the installation efficiency is improved.

 

No pre-drilling: Self-drilling screw has its own drill bit structure, which can be directly used on different materials such as metal, wood and plastic. The design without pre-drilling not only saves the construction time, but also reduces the trouble of tool switching.
Suitable for various materials: self-drilling screws are suitable for various materials, such as thin metal plates, wood, PVC plates and so on. Workpieces with different materials and thicknesses can be firmly connected by selecting appropriate screws.
Cost saving: Since tools and manual operation steps are reduced, self-drilling screws can effectively reduce the engineering cost. In addition, its high efficiency also reduces the waste of materials and processing errors that may occur in construction.
Strong corrosion resistance: many self-drilling screws have been specially treated, such as zinc plating or coating protection, which can effectively resist the corrosion of moisture, chemicals and other factors and prolong their service life.

  • HEX HEAD SELF DRILLING SCREW

    Самасвідравальны шруба мае наканечнік свердзела, які пазбаўляе ад асобных аперацый свідравання і наразання для больш хуткай і эканамічнай ўстаноўкі. Кропка свідравання дазваляе ўсталёўваць гэтыя свідравальныя шрубы ў сталёвую аснову таўшчынёй да 1/2 цалі. Самасвідравальныя шрубы даступныя ў розных стылях галоў, даўжыні разьбы і даўжыні канаўкі для шруб дыяметрам ад №6 да 5/ 16"-18.

  • TRUSS HEAD SELF DRILLING SCREW

    Самасвідравальныя шрубы з кроквеннай галоўкай звычайна выкарыстоўваюцца для мацавання шаф да сталёвых шпілек. Яны таксама выкарыстоўваюцца ў прыкладаннях, якія патрабуюць нізкага зазору над галавой. Нарэшце, шрубы Tek Screw выкарыстоўваюцца для зборкі металічных частак, якія будуць выкарыстоўвацца ў вільготным асяроддзі.

  • PAN HEAD SELF DRILLING SCREW

    Што такое шруба з круглай галоўкай? Адным з універсальных тыпаў шруб, якія выкарыстоўваюцца ў асноўным для прымянення метал-метал, з'яўляюцца шрубы з круглай галоўкай. Гэты ўтылітарны шруба мае шырокую галоўку з закругленымі бакамі, якую некаторыя параўноўваюць з перавернутай патэльняй, і патрабуе адтуліны з нарэзкай. Самасвідравальны шруба мае наканечнік свердзела, які пазбаўляе ад асобных аперацый свідравання і наразання для больш хуткай і эканамічнай ўстаноўкі. Кропка свідравання дазваляе ўсталёўваць гэтыя свідравальныя шрубы ў сталёвую аснову таўшчынёй да 1/2 цалі. Самасвідравальныя шрубы даступныя ў розных стылях галоў, даўжыні разьбы і даўжыні канаўкі для шруб дыяметрам ад №6 да 5/ 16"-18.

  • CSK HEAD SELF DRILLING SCREW

    Самасвідравальныя шрубы Csk Phillips з'яўляюцца высокатрывалымі і трывалымі мацаваннямі, якія выкарыстоўваюцца для прымянення ліставога металу. Каб забяспечыць ідэальную зборку, варыянт шрубы з крыжападобнай шайбай з патаемнай шайбай павінен выкарыстоўвацца ў спалучэнні з патаемным адтулінай. Выкарыстанне гэтых шруб патрабуе папярэдне прасвідраваных адтулін. Самі шрубы маюць разьбу з кручанай градацыяй, што дазваляе лёгка ўсталёўваць іх у накіравальную адтуліну. Гэта дазваляе выкарыстоўваць шрубы ў высокадакладных праграмах, такіх як зборка машын і электрычных кампанентаў

  • Painted Hex Flange Head Self Drilling Screw with EPDM Metal Bonded Washer

    Enamelled Hex Head Self Drilling Screw Color Painted Hex Head Self Drilling Screw is strong corrosion resistant on outside roofing sheets working.

  • Drilling Point #5 Self Drilling Screw for 15mm thick metal sheets

    Drilling Point #5 Self Drilling Screw for 15mm thick metal sheets

  • Enamelled Hex Head Self Drilling Screw

    Enamelled Hex Head Self Drilling Screw Color Painted Hex Head Self Drilling Screw 

  • Nylon Hex Head Self Drilling Screw

    Colorful Plastic Cap Nylon Hex Flange Head Self Drilling Screw Roofing Screw Sheet Metal Screw Standard DIN 7504K Inside Diameter ST3.5-ST6.3 Material C1022A

  • Ruspert Coated Hex Flange Head Self Drilling Screw

    Ruspert coated self drilling screws work in high corrosion environment. It can be compliant with ASTM B117, ASTM B695, DIN50018, DIN50021 and AS3566.2.Ruspert color covers Silver, Grey, Blue, Brown, White, etc.500 hours, 1000 hours and 1500 hours hours can be selected for Salt Spray Test.5 cycles, 15 cycles and 20 cycles are available for Kesternich Test.

Strength of Self-Drilling Screws 

 

Axial tensile strength: the axial tensile strength of self-drilling screws depends on many factors, including its material, thread design and anchorage after drilling into the material. Generally speaking, self-drilling screws are made of carbon steel, stainless steel and other materials. For example, high-quality carbon steel self-drilling screws can withstand a certain degree of axial tension after drilling into metal plates. In the field of architecture, when used to fix the color steel plate on the roof, the self-drilling screws with normal specifications can withstand large wind suction. If it is screwed into a metal plate with appropriate thickness according to the correct installation process (such as 0.61.0mm thick color steel plate), it can resist the wind suction of at least 1.01.5kN per square meter and ensure that the color steel plate will not be lifted under normal wind conditions.

Shear strength: the shear strength of self-drilling screws is also very important to ensure the stability of the connection structure. Its shear strength is related to the diameter and material of the screw and the friction between the thread and the connected material. In automobile manufacturing, self-drilling screws are used to fix some thin plate structures in non-critical parts, such as the fixing of automobile interior panels. When the vehicle is subjected to vibration, collision, etc. during driving, these self-drilling screws can bear a certain shear force at the joint. Taking a self-drilling screw with a diameter of 4mm as an example, the shear strength can reach about 35kN in the connection of suitable materials (such as fixing plastic interior panels and thin metal brackets), which effectively prevents the interior panels from shifting due to external force.

 

Durability of Self-Drilling Screws 

 

Corrosion resistance: If the self-drilling screw is made of stainless steel, it has good corrosion resistance. For example, 304 stainless steel self-drilling screws can be used for many years without rusting in general outdoor environment (such as environment with high humidity and a little acid rain). This is because stainless steel contains alloying elements such as chromium, which can form a dense oxide film on the surface to prevent oxygen and moisture from further corroding the screw. In the building facilities in coastal areas, such as the awning on the seashore and the simple railing of the wharf, the use of stainless steel self-drilling screws can effectively resist the corrosion caused by seawater and sea breeze.

Wear resistance: the wear resistance of self-drilling screws is mainly reflected in its drill tip and thread part. Because the drill tip will rub with the material when drilling into it, it needs good wear resistance. The drill tips of many self-drilling screws are made of cemented carbide, which has high hardness and good wear resistance. In the industrial environment where self-drilling screws are frequently used, such as the prefabrication factory of steel structure, even if they are installed and used for many times, their drill tips can maintain a good sharpness and can effectively penetrate materials. At the same time, the wear resistance of the thread is also very important. Good thread wear resistance design can ensure that the thread will not be damaged by vibration, friction and other factors during long-term use, thus ensuring the fastening of the connection. For example, the thread self-drilling screw with special surface treatment (such as hard chromium plating) will obviously reduce the thread wear speed and prolong its service life by about 30% to 50% in the connection environment with certain friction (such as the connection between wood and metal).

Anti-loosening performance: after drilling into the material, the thread of the self-drilling screw is closely combined with the material, which has good anti-loosening performance. Especially in the environment with vibration, such as fixing the shell of mechanical equipment, installing the outdoor unit of air conditioner, etc. In these application scenarios, self-drilling screws can keep the connection relatively stable under long-term vibration environment through the friction between their own threads and materials and possible mechanical occlusion. Some self-drilling screws will also adopt special anti-loosening design, such as adding nylon washers or using coatings with thread locking agents to further improve their anti-loosening performance and make the connection structure durable and reliable under complex working conditions.

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