One-Step Core Pins T4 Head Thickness

One-step core pins are used to lock down precision core location inside an injection mold while maintaining stable ejection alignment. This T4 head thickness variant is suited to molds where core-to-cavity spacing must remain repeatable after multiple cycles.

• Automotive connector housings: Use for stepped core positioning to help keep fine features aligned during ejection, reducing mismatch that can cause flash or misfit to mating parts. The selectable steel grades support tailored wear resistance for long production runs.
• Consumer appliance vents and housings: The one-step geometry simplifies mold layout and installation while preserving consistent fit. Tight L dimension tolerances (+0.02/0, 0/-0.1) support controlled stack-up across the mold cavity/core system.
• Medical device component molds: Stepped round core pins benefit from controlled tip and gradient tolerances when locating precision cores for thin-wall geometries. Diameter control within the provided shaft tolerances helps maintain predictable alignment.

This core pin series is available in multiple steels to match different wear and dimensional stability needs. Options include SKH51, SKD61 (H13 equivalent), NAK80, STAVAX ESR, DH2F, SUS440C, MAS1C, and PROVA400, allowing selection based on hardness, toughness, and corrosion resistance requirements.

• SKD61 (H13 equivalent): Commonly selected when a balance of toughness and hot-work wear resistance is needed.
• SKH51: Typically chosen for high wear resistance where maintaining edge integrity is critical.
• NAK80 / STAVAX ESR: Often selected for improved dimensional stability and surface performance in precision tooling applications.

Because exact hardness values and heat-treatment states are not specified in the provided data, final hardness (HRC), quenched & tempered level, and any surface treatments (e.g., nitriding) should be confirmed for the selected grade in your quote build.

Select the one-step core pin dimensions to match the mold’s core positioning stack-up and bearing surfaces. Start by choosing the required D/P (shaft diameter) in the range 0.8–16 mm and verify the provided shaft diameter tolerance (-0.01/-0.02 or 0/-0.005) aligns with your hole/bore tolerance strategy.

• Match the locating height (L): The L dimension is available in multiple ranges (e.g., 12–100, 30–120, up to 12–150). Use the tight L tolerance (+0.02/0, 0/-0.1) to control core-to-cavity spacing.
• Confirm the step geometry: Select the first step shape (1A–1E) and the A (step diameter) range 0.4–5 mm. Ensure C (step type taper width) (0.1–4 or 0.1–1) matches your receiving pocket geometry.
• Tip fit details: Choose the tip shape (e.g., no processing, B/C/G/R/T) and set the V (tip diameter) range 0.5–5 mm so the tip engages as intended without over-constraining.

While most dimensions are selectable within the stated ranges, the tolerance class (shaft and L) is defined per variant; align these with your mold’s reamed hole or EDM pocket tolerances to avoid assembly interference.