VINACNC - Expert in High-Precision 40Cr and SKD61 Ejector Pins and Sleeves

In the mould industry, the ejector pin and ejector thimble (sleeve) are core components that determine the precision and efficiency of the part ejection process. VINACNC is proud to supply high-quality 40Cr ejector pins and SKD61 sleeves with a diameter of 20mm, 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 ejector sleeves in plastic injection moulds.

• Technical Properties:

  • Dimensions: The pins and sleeves have a diameter of 20mm. These dimensions can be customized according to customer requirements.

  • Hardness: After heat treatment, the materials achieve a stable hardness (typically around HRC 45-54°), 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 plastic leakage, and guaranteeing the accuracy of the final product.

  • Wear Resistance: The SKD61 thimble is surface-hardened, giving it superior wear resistance, making it especially suitable for components that endure high friction.

• Applications: 40Cr ejector pins and SKD61 thimbles are indispensable components in plastic injection molds and stamping dies for part ejection and hole punching. They are widely used in industries producing automotive parts, electronic device housings, and precision machinery.

Product Advantages

• Superior Durability and Performance: With high-quality materials, the ejector pins and sleeves resist repetitive force and pressure, 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 material leakage and product defects.

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

• High Wear Resistance: The surface-hardened SKD61 thimble provides high wear resistance, allowing it 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