JIS Standard SKD61 Steel Straight Center Pins with Tip, Nitrided

Straight center pins with tip are used in injection mold tooling to ensure repeatable alignment between moving die components and the ejector-side interfaces during every cycle. The nitrided SKD61 steel surface helps maintain dimensional stability and wear resistance in high-count molds where centering accuracy must remain consistent over time.

• In automotive connector molds, the tip geometry supports controlled location during mold closure, reducing misalignment risk and improving part-to-cavity consistency.
• For consumer electronics housings, the pin tip is used to register ejector sleeves and guide smooth ejection, where cycle-heavy operation demands durable surface performance.
• In medical device housings and precision inserts, the reference/locating function improves setup repeatability, helping maintain stable positioning between assembly cycles.

Because this variant specifies JIS SKD61 with nitriding, it is suited for long-running die sets that prioritize alignment reliability and reduced tip wear under frequent mechanical contact.

This product uses JIS SKD61 steel, a hot-work die steel commonly selected for tooling requiring toughness under repeated thermal and mechanical loading. The nitrided surface treatment improves wear resistance at the tip/contact area while keeping the bulk steel properties suitable for shock tolerance during mold operations.

• Heat treatment state: nitrided (surface-treated) SKD61, providing a hard, wear-resistant top layer.
• Hardness & trade-offs: nitriding increases surface hardness and abrasion durability, while the core remains more impact-tolerant than a fully hardened, uniformly very high-hardness state.
• Wear vs toughness: optimized for repeated contact and sliding/locating at the tip; performance prioritizes surface durability with acceptable toughness for ejector alignment tasks.

Compared with non-nitrided tool steels, the nitrided SKD61 variant typically offers longer service life at the locating surface where wear would otherwise accumulate.

Select the center pin size to match the ejector sleeve and die locating requirements using the provided ranges for shaft diameter and overall length. The D/P (shaft diameter) is 1.5 ~ 16 mm; choose the diameter that matches the sleeve bore/guide feature so the reference tolerance can be maintained for stable fit.

• Confirm shaft diameter tolerance: -0.01 / -0.02 (reference tolerance). This indicates how tight the fit must be relative to the mating bore.
• Choose L (length) based on the required projection and engagement depth: available options include 50~500, 50~600, 50~700, 50~250, and 50~400 mm.
• Select tip shape and geometry to match your registration method: B, C, G, R, T. Tip chamfering parameters are C = 0.1 (0.1~0.1), R = 0.2 (0.2~0.2), S = 0.1 (0.1~0.1), and taper angle K = 45~89° or 1~45°.

Also verify head thickness per the JIS configuration (6 mm or 8 mm) or T4 = 4 mm, since head size affects seating and assembly alignment.