Metric Center Dowel Ejector Punches (SKD11 Equivalent)

These metric center dowel ejector punches are used in precision die sets where repeatable center alignment directly affects ejection timing and product geometry. The locating dowel hole supports stable positioning relative to the die base, reducing center drift during high-cycle punch and eject operations.

Common scenarios include:

• Automotive and appliance stampings: where consistent ejection strokes and part concentricity are required, especially with closely toleranced features.
• Connector and terminal tooling: the stepped shank and integrated dowel hole help maintain positional accuracy while ejecting parts from cores and carriers.
• General industrial forming: the SKD11-equivalent wear-resistant construction supports durability in punch operations with abrasive wear from repeated contact.

This variant is suited to metric tooling because its shank geometry and locating function are designed for controlled fit in die components, improving alignment repeatability across production runs.

This punch is specified as SKD11-equivalent steel (often treated as an AISI D2-type high-carbon, high-chromium die steel in industry cross-references). It is selected for high wear resistance to withstand repeated punch/extractor contact and sliding at the die face.

• Hardness & wear vs. toughness: SKD11-equivalent typically delivers high hardness for abrasion resistance, but as hardness increases, impact toughness can decrease. This trade-off is important when the process includes shock loading.
• Heat treatment state: die steels in this family are commonly quenched and tempered to achieve target hardness and dimensional stability for punch components.
• Manufacturing process: material is usually machined to shank/tip dimensions, then heat treated and finished to size for precise fit in die tooling.

If you require higher toughness at the cost of wear life, softer die steels can be used, but for punch wear-dominant applications this SKD11-equivalent selection is a strong match.

Select dimensions by matching the punch shank and tip to the die cavity/core and clearance requirements. The D (shank diameter) range is 10 ~ 45 mm; choose a diameter that fits the corresponding die guide/bushing bore while maintaining the intended clearance. The tip geometry is configurable (round, rectangle, oblong, double flatted round, radius rectangle), along with P (tip dimension) 2.5 ~ 35 mm, W (tip width) 2.5 ~ 9 mm, and tip corner radius R 0.15 mm.

• Tip length (B): pick from the available L/S/X variants to control penetration depth and engagement.
• Overall length (L): choose from the provided ranges (e.g., 50–150, 60–150, 40–150, 70–150, 80–150 mm) based on press stroke and die stack height.
• Length alterations: use LC 25 ~ 130.1 mm and PC 1.25 ~ 17.5 mm to tune reach and tip position.

Because the product description references an m5 shank diameter tolerance, ensure your die component opening and guides are specified to achieve the controlled fit needed for smooth centering and stable operation.