DIN Standard SKD11 Steel Gas Release Single-Stepped Ejector Punches

This gas release, single-stepped ejector punch is used in injection mold tooling where stable ejection and reliable alignment are critical. The locating dowel hole improves centering inside the die set, helping prevent punch-to-bushing misalignment during repeated press cycles.

Automotive connector and housing molds benefit from the consistent shank positioning, especially when thin-wall parts require controlled knockout to avoid surface marking. The single-stepped geometry supports repeatable placement through normal production wear cycles.

Consumer electronics and appliance housings often require uniform ejection across multiple cavities. This punch’s DIN-standard form factor and wear-resistant SKD11 (D2) steel help maintain dimensional stability in die assemblies that run high cycle counts.

Thermoplastic medical device housings and other precision parts can use the locating hole for repeatable alignment, supporting clean part release without dwell-related drift in guided systems.

• Single-stepped shank + locating dowel hole for repeatable centering
• SKD11 (D2) wear resistance for stable die operation
• DIN-standard suitability for typical ejector punch layouts

The punch is manufactured from SKD11 steel, commonly associated with AISI D2 tool steel. SKD11 is selected for its high wear resistance in die and punch environments where sliding contact and abrasive action can gradually degrade tool surfaces.

In tooling practice, SKD11 is typically supplied in a hardened and tempered state for balanced performance. After heat treatment, the material targets high hardness (commonly around the mid-50s HRC range for D2-class steels) to resist edge rounding and surface wear during ejection cycles.

Hardness provides durability, but it can reduce toughness compared with softer grades; therefore, the single-stepped support and proper fit in the guide system are important to limit bending and chipping risk.

• SKD11 (D2 equivalent): high wear resistance; hardened & tempered
• Trade-off: higher hardness may lower toughness versus lower-alloy alternatives
• Best use: die setups needing long service life in punching/ejection locations

Select the ejector punch by matching the shank diameter (D) and overall length features to the mold’s guide and ejector stroke geometry. This series provides D = 10 ~ 45 mm, so choose the diameter that matches your guide bushing or fitted bore for stable alignment.

Match the working end geometry to the part and ejector clearance. Tip shape options include Round, Rectangle, Oblong, Double flatted round, Radius rectangle, with P (tip dimension) = 3 ~ 35 mm and W (tip dimension) = 3 ~ 9 mm. Tip length is defined by B (tip length) = L, S, X and the corresponding tip-length alteration parameters PC = 2.8 ~ 30 mm and WC = 2.8 ~ 8 mm depending on variant.

For overall travel and clearance, use L = 60 ~ 100 mm and LC = 34 ~ 72 mm (full length alteration). The listed values should be verified against your die layout drawing; where a guide interface is involved, maintain the intended fit using the available m5 shank diameter tolerance guidance to ensure smooth, repeatable centering.

• Choose D within 10–45 mm for guide compatibility
• Choose P within 3–35 mm for contact/clearance
• Verify L (60–100 mm) against ejection stroke and safe clearance
• Use LC (34–72 mm) and tip alteration ranges to fit cavity/core spacing