Rod Diameter 9mm 40Cr & SKD61 Ejector Pins for Industrial Injection Moulds

In the mould industry, the ejector pin is a core component that determines the precision and efficiency of the part ejection process. VINACNC is proud to supply 40Cr and SKD61 ejector pins with a rod diameter of 9mm, along with high hardness and tight tolerances, ensuring superior performance and durability even under harsh production conditions.

Technical Specifications, Materials, and Applications

• Materials: The products are crafted from high-quality tool steels:

  • 40Cr Steel: A high-quality alloy steel with good strength and hardness after heat treatment, often used for ejector pins.

  • SKD61 Steel (JIS): A widely used tool steel known for its hardness, strength, and good heat resistance, suitable for plastic injection and die-casting moulds 

• Technical Properties:

  • Dimensions: The pins have a rod diameter of 9mm. These dimensions can be customized according to customer requirements.

  • Hardness: After heat treatment, the materials achieve a stable hardness (typically around HRC 45° for 40Cr and HRC 48-54° for SKD61), allowing the pins to withstand high pressure and friction during continuous operation.

  • Precision: The products are machined with extremely tight diameter tolerances, ensuring a perfect fit with the mold, preventing material leakage, and guaranteeing the accuracy of the final product.

• Applications: 40Cr and SKD61 ejector pins are indispensable components in plastic injection molds and die-casting molds for complex, high-durability parts such as automotive components, electronic device housings, and industrial products.

Product Advantages

• Superior Durability: By using high-quality steel and advanced heat treatment processes, our ejector pins can withstand repetitive force and pressure during production, extending the mould's lifespan.

• Absolute Precision: Dimensions are strictly controlled down to the micrometre level, ensuring the components operate in perfect conjunction, minimizing the risk of plastic leakage and product defects.

• Optimized Performance: The smooth operation helps to reduce the molding cycle time and enhances overall production efficiency.

• High Wear Resistance: The ultra-precise surface finish gives the components high wear resistance, allowing them to withstand millions of production cycles.

Post-Machining Product Inspection Process

1. Hardness Test: We use a professional hardness tester to verify the hardness of the heat-treated material, ensuring it meets technical specifications.

2. Dimensional and Tolerance Check: We use a Coordinate Measuring Machine (CMM) or other high-precision measuring instruments to check the diameter, length, and concentricity.

3. Surface Inspection: We use a surface roughness tester and visual inspection to ensure there are no cracks, scratches, or other defects.

4. Functionality Test: The components are test-fitted with related parts to ensure a perfect fit and smooth operation.

Packaging and Storage Process

• Cleaning and Rust Prevention: The components are cleaned and coated with a specialized anti-rust oil to protect their precision surfaces.

• Secure Packaging: Products are carefully packed in rigid plastic boxes or cardboard crates with foam to prevent damage during transport.

• Information Labeling: The packaging is clearly labeled with the product code, weight, dimensions, and handling instructions.

• Storage Instructions: We recommend storing the products in a dry, cool environment, away from high humidity and corrosive chemicals.

Contact Information:

• VINACNC - Precision CNC Machining Expert

• Hotline: +84 904609889

• Email: vinacnc.us@gmail.com

• WhatsApp/Zalo/Wechat: +84 904609889