DIN Standard Steel Center Dowel Ejector Punches

Center dowel ejector punches are used in die sets and progressive tooling where repeatable part release and stable alignment are critical. During die opening, the center dowel guidance helps maintain coaxial alignment between moving components, reducing mis-ejection and scuffing on the part.

• Automotive and industrial connector housings: use the center guidance effect to keep ejection forces aligned across the cavity, improving consistency over high production cycles.
• Consumer appliance components: selectable tip shapes allow engineers to tailor contact and penetration behavior to thin-wall or textured surfaces, supporting controlled ejection reliability.
• Electronics and enclosure parts: the metric configuration is suited for standard die set assemblies, helping integration with metric tooling dimensions and die layout.

This variant supports controlled guidance through its selectable tip geometry and durable steel construction (M2 or A2), making it well-suited for reliable ejector actuation in production environments.

This series is available in M2 or A2 steel, both commonly specified for precision punch and ejector elements requiring good wear resistance in die operations. In typical practice, M2 is an HSS grade (commonly associated with AISI M2 performance), while A2 is a tool steel (often referenced as AISI A2 equivalent). Material choice is selected based on the balance of wear resistance and toughness needed for your ejection loads and cycle rate.

• M2: favored where higher abrasion/wear resistance is prioritized for longer production runs.
• A2: selected when a different toughness-to-wear balance is preferred for the specific die set conditions.

These steels are typically manufactured as precision-cut punches and then heat treated to achieve the target hardness for punch stability and repeatable guidance performance. Select the material based on expected wear mechanisms and the load profile during ejection.

Use the specified shank diameter (D) to match the locating and bearing requirements of your die set. Available D values are 10, 13, 16, 20, 25, and 32 mm; choose the diameter that aligns with your ejector plate bore and the center guidance system design.

Overall length is given as L = 71 to 130 mm (range). Match L and the tip engagement using L1 (point length), available in 19–25 mm and 25–30 mm, so the point provides the required contact during ejection without bottoming in the cavity.

• For the specific workpiece interaction, select the tip shape from H, J, K, L, N, O, R, V, X, Y, Z.
• Verify the P (4–16 mm) and W (4–10 mm) dimensions against your tool pocketing/clearance constraints.
• Check the R (0.2–12.475 mm range depending on variant) radius requirement for controlled penetration/contact.

Confirm fit and clearance in the ejector and guide system; while tight guidance is expected, ensure your die layout tolerances can accommodate the chosen punch geometry.