DLC Coating Gas Release Single-Stepped Center Dowel Ejector Punches

Gas-release single-stepped center dowel ejector punches are used in injection mold tooling and progressive die sets where ejector force must be consistent and parts must release reliably. The center dowel hole provides positive locating inside the ejector system, helping prevent punch-to-cavity misalignment during high cycle operation.

• Thin-wall plastic housings & snap-fit parts: The DLC-coated surface supports smoother die ejection and helps reduce galling/adhesion on sliding interfaces, improving cycle-to-cycle repeatability.
• Automotive interior/exterior components: The single-stepped geometry stabilizes tool positioning under varying part stiffness, while the dowel locating improves alignment for multi-cavity or sequential ejector stages.
• High-cycle stamping/die casting auxiliaries: Hardened tool steel and wear-resistant coating are suited to frequent contact, where stable locating and reduced surface wear extend tool life.

Variant selection supports different ejector designs via standard or spring reinforced Jector types, enabling tuning for return behavior and load conditions.

The provided description specifies a D2 equivalent hardened tool steel (also referenced as SKD11 equivalent) with DLC (XCD) coating for improved wear performance. D2/SKD11 is typically selected for its balance of high wear resistance and adequate toughness, which is critical for locating punches that experience repeated sliding and ejection forces.

• Coating: DLC (XCD) forms a low-friction, wear-resistant surface to reduce galling and promote smoother ejection.
• Heat treatment state: The product is described as hardened tool steel for stable locating and production durability.
• Hardness/transition: The exact HRC value is not provided in the input data; however, hardened D2/SKD11 generally implies a high-hardness condition optimized for wear, with toughness traded against impact resistance.
• Material comparison: Within this family, choosing D2/SKD11 over softer tool steels improves wear life at the cost of requiring controlled feed/edge design to avoid chipping.

To select the correct gas-release ejector punch, start by matching the shank diameter D to your ejector bushing/guide and alignment stack. This product supports D = 10 ~ 45 mm, and the shank is indicated as m5 shank diameter tolerance, so your mating part should use an appropriate m5 fit strategy to ensure controlled guidance without binding.

Next, size the working end: choose the tip dimension P within 3 ~ 35 mm and select the tip shape (Round, Rectangle, Oblong, Double flatted round, Radius rectangle) to match cavity geometry. The tip length B is configurable as L, S, or X, and overall length is selected from the provided L range options (70–120, 60–120, 80–120, 100–120 mm) depending on the build-up required.

• Confirm LC (34 ~ 72 mm) and PC (2.8 ~ 30 mm) against your ejector travel and clearance requirements.
• Use the available corner radius R = 0.15 mm and tip width W (3 ~ 9 mm) to maintain consistent contact and avoid localized stress.
• If your design requires a specific height stack, select the matching full length alteration (LC) to maintain correct stand-off and part release timing.