Two-Step Core Pins Head T=4 mm

Two-step core pins are used in injection mold tooling where repeatable alignment between the core and mold base is critical. This variant’s stepped bearing head (T=4 mm) creates a stable guidance surface, helping maintain consistent positioning through repeated press cycles.

• Automotive connector and sensor molds: The configurable shaft diameter (D/P = 1 to 16 mm) lets designers match the pin to the core-block layout, improving core-to-cavity alignment and supporting reliable ejection repeatability.
• Medical device housing molds: Tight dimensional control using the specified L dimension (+0.02/0) supports accurate assembly fit, which is important when molded parts require stable geometry over high mold counts.
• General die and mold assemblies: The two-stage diameters provide improved core guidance stability, reducing the risk of misalignment during opening/closing.

Hardened steel options further suit environments with frequent contact and cyclic loading.

The core pin is offered in multiple hardened steels selected for wear resistance and dimensional stability under repeated mold cycles. Available materials include SKH51, SKD61, NAK80, DH2F, and MAS1C (exact grades and procurement state depend on the chosen SKU).

• SKH51: High-hardness tool steel commonly selected for abrasion resistance where sliding/bearing wear is significant.
• SKD61: Heat-check and toughness balanced for hot-work tooling applications.
• NAK80: Often chosen where surface stability and machining/finishing balance is required.
• DH2F / MAS1C: Variants typically selected for wear resistance and mold service life based on cavity/core contact conditions.

For each option, pins are manufactured from hardened steel stock and finished to control bearing surfaces. Hardness (HRC) and heat-treatment specifics are tied to the selected material variant; select the grade that best matches your expected wear vs. toughness trade-off.

Select dimensions by matching the pin’s stepped geometry to your core guidance and locating scheme. Start with D/P (shaft diameter) = 1 to 16 mm to ensure the pin fits the corresponding core-block hole. Then choose the required F (bearing bore length) = 10 to 98 mm (bearing contact length) to match the depth of your guidance feature.

• Choose the first-step style (CA, CB, CC, CD, CE) and first-step diameter type A = 0.5 to 5.1 mm, ensuring the upper step provides the intended alignment/bearing surface.
• Select the second-step shape (A, B, C, D, E) and related dimensions such as G (0.1 to 0.5 mm), J (0.5 to 5 mm), and V (0.5 to 5.1 mm) to match your stepped pocket profile.
• Verify the overall L dimension = 12 to 100 mm (or other listed ranges) for correct stack-up; when applicable, use the provided L tolerance (+0.02/0) for fit.
• Confirm G/Q/R chamfering/fillet features (e.g., Q = 0.2, R = 0.1 to 0.2 mm) to avoid interference at the pocket edges.

The shaft diameter is configurable, while geometry sets (step shapes) are fixed per selection.