Expansion bolt specifications
The customized specifications of expansion bolts mainly include the diameter and length of the bolt, as well as the size and tolerance zone number of the thread. ‌
The diameter of the expansion bolt is usually marked with the letter M, such as M6, M8, M10, etc., which indicates the nominal diameter of the bolt. Length specifications include 50, 60, 65, 80, 100 and other options. The specific length can be customized according to needs‌12.
In addition, the strength grade of the expansion bolt is also very important. Common grades include 3.6, 4.8, 6.8, 8.8, 9.8, 12.9, etc. These grades indicate the tensile strength and yield strength of the bolt. For example, a grade 8.8 bolt has a tensile strength of 800MPa and a yield strength of 640MPa‌34.
When customizing expansion bolts, you also need to consider the type of material. Common materials include carbon steel and stainless steel. The grades of carbon steel bolts are divided into 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc., while stainless steel expansion screws have specific specifications and sizes. Supports customization of various sizes and mod
Main features of our expansion bolts
‌Expansion performance‌: The expansion bolt consists of a steel pipe and a built-in piston. Clay or cement is poured into pre-drilled holes in the solid foundation to expand it, thereby fixing the connection between the bolt and the foundation‌.
‌Stable performance‌: The performance of expansion bolts is very stable and is not affected by environmental factors such as temperature and humidity, and can be used safely for a long time‌.
‌Easy installation‌: The installation process of expansion bolts is very simple. You only need to drill the holes and insert the bolts into the holes‌.
‌Strong adaptability‌: Expansion bolts can be used as long as they meet the thread size requirements of the workpiece, and they have stronger adaptability‌.
‌High success rate‌: The installation success rate of expansion bolts is high, and problems such as installation tilt will not occur‌.
‌Novel design‌: The design of the expansion bolt is relatively novel and its aesthetics has been improved‌.
‌Widely used‌: Expansion bolts are widely used in buildings, roads, bridges, etc., and are a very common connecting element‌.
‌The working principle of expansion bolts‌ is to achieve a fixing effect by generating friction through the slope. When the nut is tightened, the screw moves outward through the thread, and the expansion tube and the peripheral composite cable generate positive pressure, and the three parts of the wall, expansion tube and cone achieve a fixed effect.
‌Application scenarios of expansion bolts‌
‌Construction‌: Used for fixed connections of concrete floors, columns, walls, etc.
‌Road and bridge engineering‌: used for installation in roads, bridges, tunnels and other projects‌.
‌Mechanical equipment‌: used to fix the connection between the base and the equipment to ensure the stability and safety of the equipment‌.
‌Glass Curtain Wall‌: Rear-expanded bottom anchors are suitable for connecting and fixing glass curtain walls. They are high temperature resistant and weldable, and the anchoring effect is safe and reliable‌.
‌Industrial plants, lifting systems, conveyor systems‌: used for the installation and fixation of various large-scale equipment‌.
‌Civil Construction‌: Used for fastening and installation of various pipes, anti-theft doors and windows, fire doors, etc.
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Expansion bolt production process
1. Material preparation
The production of implosion expansion screws first begins with high-quality material preparation. High-strength, corrosion-resistant alloy steel is usually selected as the raw material to ensure strong endurance and long service life. Materials undergo stringent quality checks before being put into storage to ensure they are free of flaws and internal defects.
2. Processing and forming
1. Cutting and shaping: The inspected steel material is accurately cut according to the designed size, and then preliminary shaped through professional mechanical equipment to shape the basic shape of the screw.
2. Thread processing: The formed steel will be threaded. This step requires high-precision machine tools and skilled operating techniques to ensure the accuracy and durability of the threads.
3. Heat treatment
In order to enhance the strength and hardness of implosion expansion screws, heat treatment is an essential link. Through quenching, tempering and other processes, the internal structure of the material can be adjusted to improve its mechanical properties and service life.
4. Surface treatment
In order to improve the corrosion resistance and aesthetics of the screws, surface treatment is performed at the end. Common treatment methods include galvanizing, chromium plating or spraying anti-rust paint, etc., which can effectively extend the service life of screws in harsh environments.
5. Quality inspection and packaging
The completed implosion expansion screws will undergo strict quality inspection, including tests on dimensional accuracy, material strength and corrosion resistance. Only screws that pass all inspection standards will be packaged and shipped to the market.
Customized expansion bolts
Applications: Designed for specialized applications requiring unique specifications.
Installation method: Customized installation according to specific application requirements.
Benefits: Customized specifications to meet unique project needs, ensuring optimal performance.
Custom Sizes: We offer bolts in standard and custom sizes to meet specific project requirements. Our advanced processing capabilities ensure a perfect fit for your application.
Material selection: Depending on the application and environmental conditions, we offer expansion bolts made of stainless steel, galvanized steel, carbon steel and other specialty materials.
Surface Treatments: For enhanced corrosion resistance and durability, we offer a variety of surface treatments including galvanized, galvanized and custom coatings.