265mm Long Die Casting Core Pins | Custom Straight & Stepped Cooling Pins for Aluminum Casting

Why Choose Senlan Precision for Your Long Core Pins?

Engineering Stability into Extra-Length High-Pressure Die Casting

Manufacturing a 265mm core pin requires more than just a lathe; it requires mastery over thermal expansion and geometric stability. At Senlan Precision, we specialize in extra-long cooling pins designed for engine blocks, transmission housings, and structural automotive parts.

Our pins are engineered to withstand the brutal thermal shock of molten aluminum while maintaining micron-level straightness, ensuring your die casting cell runs without unscheduled interruptions.

Solving the Engineering Challenges of Extra-Long Core Pins

1. Precision Straightness Over 265mm

• The Issue: Long pins are prone to warping during heat treatment and bending during grinding.

• Our Solution: We utilize specialized stress-relief cycles and Swiss-made high-precision cylindrical grinding. We guarantee Total Indicator Reading (TIR) within ±0.01mm over the entire 265mm length, preventing core breakage and casting eccentricity.

2. Zero-Leakage Internal Cooling Channels

• The Issue: Deep-hole drilling deviations can lead to thin walls and high-pressure water leaks inside the die.

• Our Solution: Advanced Deep Hole Drilling (Gun Drilling) technology ensures the cooling channel remains perfectly centered. Every "Cooling Pin" undergoes a mandatory 1.5 MPa hydraulic leak test before shipment to guarantee operator safety and mold integrity.

3. Resistance to Heat Checking & Soldering

• The Issue: Rapid thermal cycling causes surface cracks (Heat Checking) and aluminum sticking (Soldering).

• Our Solution: We use Premium H13 (SKD61) ESR Steel, heat-treated to 48-52 HRC per NADCA #207 standards. Optional Ion Nitriding or PVD coatings (CrN/TiAlN) are applied to create a hard, anti-corrosive barrier that significantly extends pin life.

Technical Specifications & Manufacturing Capabilities

Core Application & Industry Expertise

Our 265mm Core Pins are mission-critical for:

• Automotive Powertrain: Engine blocks, oil pans, and gearbox housings.

• Structural Components: EV battery trays, shock towers, and sub-frames.

• Telecommunications: Large 5G base station heatsinks and enclosures.

• Heavy Machinery: High-strength aluminum alloy structural joints.

The 5 Strategic Advantages of Partnering with Senlan

As an OEM supplier for global Tier-1 die casters, we offer:

1. NADCA Standard Compliance: Full adherence to North American Die Casting Association material and heat-treat protocols.

2. DFM Review: We analyze your cooling channel design to ensure optimal wall thickness and flow efficiency.

3. Quality Documentation: Every shipment includes a Steel Origin Certificate, Heat-Treat Chart, and Dimensional Inspection Report.

4. Precision Threading & Sealing: Custom NPT/PT threads and O-ring grooves machined to a perfect finish for leak-free connections.

5. Reliable Logistics: Export-grade protective packaging with rust-preventive oil to ensure pins arrive in perfect condition.

FAQ – Expert Insights for Die Casting Engineers

Q: What is the maximum depth-to-diameter ratio for your cooling holes?

A: We can achieve a ratio of up to 30:1 with high concentricity, depending on the material and pin diameter.

Q: How do you handle the "Soldering" issue on the pin tip?

A: In addition to high-polish finishes, we recommend and provide Ion Nitriding or DLC coatings, which create a non-wetting surface against molten aluminum.

Q: Can you produce core pins based on DME, HASCO, or LKM standards?

A: Yes. While 265mm is often a custom length, we maintain full compatibility with all international mold base standards and tolerances.

Request a Technical Quote & Pressure Test Verification

Eliminate the risk of pin failure in your next project. Send your STEP or DWG drawings to the Senlan Precision engineering team for a Manufacturing Design Review.