Dicoat Treatment SKD11 Steel Center Dowel Ejector Punches - Metric

Guided die-set ejection:

Use this locating dowel center punch in injection and stamping tooling where the punch must stay coaxial under high cycling. The locating dowel hole improves repeatable alignment between the punch and die set, helping reduce side-load and maintaining stable ejection force over time.

Automotive and industrial components:

For automotive connector housings, brackets, and other thin-to-moderate wall parts, precise center guidance helps prevent scoring of the punch and mating bushing. The Dicoat surface treatment supports smoother sliding and improved wear control in long-run production.

Metric tooling for insertable die mechanisms:

This metric variant is suited to die designs that use standardized shank guidance and controlled tolerances. Select the appropriate shank diameter and tip geometry (round, rectangle, oblong, or flatted forms) to match cavity/core features and ensure consistent ejection behavior.

Steel and functional intent:

The SKD11 steel center ejector punch is an SKD11-grade equivalent of D2 steel, selected for balanced hardness and toughness in guided punch applications. The Dicoat surface treatment is applied to improve wear resistance and reduce friction during punch travel.

Hardness and wear/toughness trade-off:

In typical mold punch service, higher hardness increases wear resistance for guided ejection, while slightly lower toughness can reduce resistance to chipping under misalignment or shock loading. With a locating dowel hole, the intended benefit is to minimize side loading so the steel hardness can be used effectively.

• Wear resistance: enhanced by Dicoat, supporting long-cycle stability.
• Toughness: maintained by the SKD11/D2-equivalent base steel under normal guided operation.
• Heat treatment state: material is supplied as an SKD11-based punch steel suitable for die/tooling performance after standard quench-and-temper practice (exact HRC not provided in the data).

Start with shank guidance:

Select the punch shank diameter D (10 ~ 45 mm) to match the die set’s guiding structure (e.g., the corresponding clearance/bushing system). Ensure the provided m5 shank diameter tolerance aligns with your precision guidance requirements for stable center alignment.

Match tip geometry to the cavity/core feature:

• Choose tip shape: Round, Rectangle, Oblong, Double flatted round, Radius rectangle.
• Select P (2.5 ~ 35 mm) and the tip width W (2.5 ~ 9 mm) to fit the mating ejector interface without forcing contact.
• Confirm corner radius R (0.15 ~ 0.15 mm) if your design requires a defined edge condition.

Verify travel length and alignment:

Select L (40 ~ 80 mm) for overall engagement, then check LC (27 ~ 99.9, 27 ~ 119.9, 32 ~ 99.9, 32 ~ 119.9 mm) and PC (1.25 ~ 30 mm) to match your press stroke and any required full-length alteration. Prefer configuring by selecting the spec combination that maintains the intended clearance in your mold stack-up.