Ejector Punches with Locating Dowel Holes - NW Coating

Ejector punches with locating dowel holes are used inside injection mold tooling where consistent alignment between the punch, stripper plate, and cavity side is critical. This NW-coated variant helps reduce wear on sliding/impact surfaces, supporting stable ejection over long production runs.

• Automotive and industrial component molds: Common in die and mold cavities for housings, brackets, and connector parts where repeated ejection cycles demand dimensional stability. The stepped shank and locating dowel holes improve assembly repeatability, reducing misalignment-driven wear.
• Die casting and stamping tooling: Suitable for standard and spring reinforced configurations where shock loads and frequent cycling can accelerate abrasion. DLC + WPC surface protection supports improved wear resistance under high-contact conditions.
• Multi-cavity precision builds: When assembly tolerance stack-up is a concern, the locating dowel hole design helps maintain punch position relative to the die set.

Use the specified shank diameter range (D = 10–45 mm) and compatible tip geometries to match your ejection layout and required footprint.

This product is based on SKD11 equivalent (D2) steel, selected for good wear resistance and adequate toughness for ejection applications. D2 family tool steel is typically hardened by quenching and tempering to achieve a hardened martensitic structure; exact hardness is not provided in the supplied data.

• Wear resistance: The NW coating system (DLC + WPC) is specified to improve sliding/abrasion performance at the punch tip and working surfaces.
• Toughness trade-off: Hardened D2-class steels can offer higher hardness and edge durability, but toughness may decrease as hardness increases; spring reinforced configurations can help manage shock loading (depending on your ejector style selection).
• Heat treatment state: Best performance is typically achieved after quench & temper for the D2/SKD11 class; coating is then applied for the final surface property.

If you compare alternatives, higher-alloy wear steels may improve surface durability, while lower-alloy grades may offer better toughness—however, this listing specifically targets the D2/SKD11 equivalent with NW coating.

Select dimensions by matching the ejector punch to the corresponding core/cavity ejection features and the stripper plate support geometry. Start with D (shank diameter) = 10–45 mm to ensure the punch fits the bore/guide and maintains proper concentricity with the locating dowel hole arrangement.

• Choose the tip profile: Available tip shapes include Round, Rectangle, Oblong, Double flatted round, Radius rectangle, with tip dimensions P = 3–35 mm and W = 3–9 mm.
• Confirm working reach: Use L = 70–120, 60–120, 80–120, or 100–120 mm depending on the required stroke clearance. The provided LC (full length alteration) = 34–72 mm and PC (tip dimension alteration) = 2.8–30 mm allow tailoring to your ejector layout.
• Check shank tolerance and fit: The description references an m5 shank diameter tolerance—match your mating guide/bore to an m5-compatible fit to avoid binding while preventing excessive clearance.
• Length variants: Some configurations reference different L bands; select the one that satisfies your die height stack-up without overtravel.