SKD61 Steel One-Step Center Pins with Cooling Hole

This SKD61 one-step center pin variant is used inside injection mold toolsets where repeatable alignment between moving and fixed components is critical. Its one-step geometry supports stable locating during assembly and operation, helping reduce misalignment-related flash and dimensional drift.

• Automotive connector and bracket molds: Use the locating pin to maintain concentricity across cycles while the integrated cooling hole supports heat management near the reference feature.
• Electronics housings and insulating parts: The nitrided surface is suitable for molds that see high wear from repeated ejection/closing actions, improving abrasion resistance on the locating interface.
• Thin-wall plastic components: Consistent positioning helps the core/cavity stay aligned, supporting uniform part thickness; the cooling feature can help stabilize local temperatures around the pin.

These design choices—one-step locating plus a cooling hole and nitrided wear surface—make it well-suited for precision injection molding where alignment and tool longevity both matter.

SKD61 is a hot-work tool steel commonly used in injection mold tooling; it is selected here for its balance of wear resistance and toughness under cyclic thermal and mechanical loading. The meta description indicates a nitrided surface treatment, which forms a hard, wear-resistant surface layer to reduce abrasion from repeated contact.

• Surface performance: Nitriding improves resistance to wear at the locating interface, supporting longer service life in high-cycle molds.
• Core behavior: The underlying SKD61 steel provides toughness so the pin can withstand operational loads without excessive brittleness.
• Heat treatment state: The specified key process is nitriding; the part is supplied as a hardened steel base with a nitrided wear surface (exact HRC is not provided in the input data).

Compared with untreated or softer surface conditions, nitriding trades some processing cost/lead time for substantially improved surface durability. Directly comparing hardness (HRC) or alternative grades is not possible from the provided specifications.

Select the one-step center pin size by matching the D/P (shaft diameter) and the length (F or L) to your mold’s core/cavity locating requirements. From the provided ranges, the shaft diameter D/P is 6 ~ 16 mm, and the shaft diameter length F is available in ranges such as 70 ~ 149.5, 70 ~ 199.5, 70 ~ 249.5, 50 ~ 249.5, and 50 ~ 240. The overall L dimension is offered as 70 ~ 150, 70 ~ 200, and 70 ~ 250 variants.

• Step and tip geometry: Choose the Step Shape (A, B, C, D, E) and Tip Shape (No processing, B, C, G, R, T) to match the mating locating feature and desired engagement.
• Cooling hole fit: Verify the W (cooling hole diameter) option (e.g., 3, 4, 5 ~ 6.5, 6 ~ 8.5, 6 ~ 11.5, 6 ~ 12.5) is compatible with your tool’s heat-management design.
• Tolerance/fit: The input does not provide tolerance values; use your standard center-pin clearance/spec for the corresponding D/P size and mating bore geometry.