DIN Standard SKD61 Steel Nitrided Taperless One-Step Center Pins with Cooling Hole

Taperless one-step center pins are used in injection mold assemblies to establish repeatable alignment between the cavity side and core side during press closure. Because they are taperless and designed as a one-step locating element, they help maintain stable centering even when tooling is cycled at high frequency.

• Automotive connector and sensor housing molds: The nitrided SKD61 surface supports scuff and wear resistance at the alignment interface, while the integrated location geometry reduces positional drift over long runs.
• Medical device housings and thin-wall components: Consistent alignment improves cosmetic and dimensional quality around shut-off lines; the built-in cooling hole option supports more controlled local temperature near the locating region.
• Electronics packaging and precision inserts: Engineers can match the pin length range (e.g., up to L 70–250 mm) to achieve correct engagement depth with sleeve interfaces.

This variant is suited for applications that require tight positioning and optional thermal management without relying on a taper for alignment.

This product uses DIN Standard SKD61 steel, a hot-work tool steel commonly treated as an H13/AISI equivalent for tooling applications. SKD61 provides a balance of wear resistance and toughness, making it suitable for locating components that experience repeated sliding/impact during mold closing.

• Surface treatment: The pins are nitrided, which increases surface hardness and wear/scuff resistance for the high-contact alignment area.
• Heat treatment state: Expected condition is quenched & tempered prior to nitriding, followed by a nitrided surface layer to improve durability.

Nitriding typically improves resistance to abrasion while slightly reducing core ductility compared with an untreated condition—so the underlying SKD61 toughness from its tempered state remains important for fatigue performance.

Selection starts with the shaft diameter (D/P) because it must interface with the sleeve-hole reference. Choose among the available D/P values: 6, 7, 8, 10, 12, 16 mm to match your locating sleeve and center-hole system.

• Engagement length: Match the available F (shaft diameter length) and L (overall length) to ensure correct seating without bottoming. F is available across ranges including 70–149.5, 70–199.5, 70–249.5, and 50–149.5 mm, while L is available as 70–150, 70–200, and 70–250 mm.
• Head thickness: Confirm head thickness options of 4 mm (T4) or 6/8 mm (JIS) to fit your tooling plate stack-up.
• Cooling hole diameter: Select W from 3, 4, 5–6.5, 6–8.5, or 6–12.5 mm based on desired thermal performance.

Use design references that accommodate standard fit practices (e.g., the product notes H7-compatible sleeve-hole reference) and validate clearance to prevent binding at maximum thermal expansion.