Hexagon Socket Set Screws with Cone Point

The hexagon socket set screw with cone point is a common fastener. The following will introduce it to you from aspects such as standard specifications, structural features, specification dimensions, application fields, materials and surface treatments, installation and disassembly:

1. Standard Specifications of Hexagon Socket Set Screws with Cone Point

National Standard: The national standard of China for hexagon socket set screws with cone point is GB/T 78-2007. This standard was implemented on December 1, 2007, replacing old standards such as GB/T 78-1985. It specifies the technical conditions, marking methods, and other contents of hexagon socket set screws with cone point.

International Standard: The international standard number is ISO 4027:2003, and the adopted standard name is Hexagon Socket Set Screws with Cone Point. The degree of adoption is usually MOD (Modified Adoption). This provides a unified reference basis for the production and trade of related products in various countries.

2. Structural Features of Hexagon Socket Set Screws with Cone Point

Hexagon Socket Design: Similar to the hexagon socket flat point set screw, the head has a hexagon socket groove. By using a hexagon wrench of the corresponding size for operation, it can provide a large torque transmission, making installation and disassembly convenient, and effectively preventing the wrench from slipping, ensuring the accuracy and convenience of operation.

Cone Point Design: The end of the screw head is conical. This design enables the cone point to embed into the surface of the connected part when the screw is tightened, forming a good positioning and fastening effect. It is especially suitable for occasions that require precise position fixing and can withstand a certain shear force, such as the positioning of shaft parts.

3. Specification Dimensions of Hexagon Socket Set Screws with Cone Point

Thread Diameter: Common thread diameters include M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M16, M18, M20, etc. Different application scenarios can select appropriate thread diameters according to actual needs to meet the requirements of connection strength and space.

Screw Length: The length specifications are relatively diverse, generally including 2, 3, 4, 5, 6, 8, 10, 12, 16, 18, 20, 25, 30, 35, 40, 45, 50, 60, etc. (unit: mm). Users can select appropriate lengths according to factors such as the thickness of the connected parts to ensure that the screws can be effectively fastened.

4. Application Fields of Hexagon Socket Set Screws with Cone Point

Mechanical Manufacturing: In various mechanical equipment, it is often used for the connection between shafts and hubs, the fixing of gears to shafts, etc. The hexagon socket set screw with cone point can accurately fix the relative position between parts, prevent displacement or loosening, and ensure the stability and accuracy of mechanical transmission.

Mold Manufacturing: In the mold structure, it is used to fix some small parts, such as ejector pins, inserts, etc. Its cone point can accurately position the parts to ensure that these parts can be accurately reset and operate during the mold opening and closing process.

Automotive Industry: For example, it is applied in the connection of some parts of automobile engines and the fixing of chassis components. It can withstand a certain amount of vibration and impact loads during the vehicle's driving process to ensure the reliability of the connection of parts.

5. Material Types of Hexagon Socket Set Screws with Cone Point

Carbon Steel: It has high strength and hardness and a relatively low cost. It is suitable for occasions with general strength requirements and non-corrosive environments, such as the fastening connection of some non-critical parts in ordinary mechanical equipment.

Alloy Steel: It has better strength and wear resistance than carbon steel and can withstand greater loads and impact forces. It is often used in occasions with high requirements for strength and durability, such as large mechanical equipment and high-speed rotating mechanical parts.

Stainless Steel: It has good corrosion resistance and oxidation resistance and is suitable for corrosive environments such as wet and acidic or alkaline conditions. In fields such as food processing equipment, medical devices, and marine engineering equipment, where screws need to maintain stable performance in harsh environments, hexagon socket set screws with cone point made of stainless steel are more applicable.

6. Surface Treatments of Hexagon Socket Set Screws with Cone Point

Electroplating: Metals such as zinc, nickel, and chromium are plated on the surface of the screw through the electroplating process. It can improve the corrosion resistance and aesthetics of the screw. Common electroplating colors include blue-white zinc, multicolored zinc, bright nickel, black chromium, etc., to meet the requirements of different application scenarios for appearance and anti-corrosion performance.

Hot Dip Galvanizing: Immerse the set screws made of carbon steel or alloy steel in a galvanizing bath with molten zinc at about 510°C, so that an iron-zinc alloy layer is formed on the surface of the steel parts. This treatment method can significantly improve the corrosion resistance of the screws and is suitable for occasions such as outdoor equipment and building structures that are exposed to the natural environment for a long time.

Blackening Treatment: Also known as bluing treatment, a black oxide film is formed on the surface of the screw through a chemical reaction. It can not only improve the rust resistance of the screw but also make the appearance more beautiful and solemn. It is often used in some products that have certain requirements for appearance and need a certain rust resistance.

Phosphating Treatment: A phosphate film is formed on the surface of the screw, which can improve the wear resistance, corrosion resistance, and lubricity of the screw. It is beneficial for subsequent assembly operations, reduces friction, and in some occasions where coating is required, phosphating treatment can improve the adhesion of the coating.

7. Installation and Disassembly of Hexagon Socket Set Screws with Cone Point

Installation: First, select a suitable hexagon socket wrench according to the screw specification, insert the wrench into the hexagon socket groove, and rotate the wrench clockwise to tighten the screw. When tightening, control the torque. Tools such as a torque wrench can be used to achieve an appropriate tightening degree according to specific application scenarios and requirements, avoiding damage or deformation of parts due to over-tightening.

Disassembly: Just rotate the screw counterclockwise with a hexagon socket wrench. If the screw is rusted or too tightly fastened, you can first spray a rust remover on the surface of the screw, wait for a while for the rust remover to take effect, and then try to disassemble it; or use the method of local heating to make the screw expand due to heat, reduce the friction force, and facilitate disassembly.