Metric Ejector Punches XNA Coating

Metric ejector punches with an XNA coating are used in injection and forming tooling where repeatable part expulsion directly affects die life and dimensional consistency. The XNA surface is suited for automotive connector and bracket mold inserts, helping limit galling and abrasion on punch tips during frequent ejection cycles.

They are also a strong fit for appliance and consumer goods die sets that run at higher duty cycles, because the punch-and-die interface benefits from improved surface durability rather than relying solely on base hardness.

For medical device housing or precision components, stable ejection alignment reduces scuffing risk on fine features. Choose from the available tip shapes (H, J, K, L, N, O, R, V, X, Y, Z) to match the required contact geometry, and select the appropriate shank diameter (D = 5–32 mm) and length (L = 40–100 mm, depending on configuration) for your cavity/core layout.

This series is offered in M2 and PS base materials, selected to balance wear resistance and toughness for punch/die contact. While exact heat-treatment targets are not provided in the listing, M2 is commonly used as a high-speed steel with good hot-spot abrasion resistance; PS is typically chosen when a different toughness-to-wear balance is preferred for forming dies and ejector interfaces.

• M2: higher wear resistance tendency; best for applications where abrasive wear and repeated ejection justify a harder, wear-focused base.
• PS: alternative steel selection for tooling needs where toughness or machining behavior is prioritized alongside wear control.
• XNA coating: applied as a surface durability layer to reduce galling and improve service life at the contact zone.

Hardness (HRC) values are not specified in the provided data; final hardness is typically achieved via the supplier’s standard steel heat treatment for the selected grade prior to coating, with performance governed by both base steel condition and the XNA layer.

Correct sizing starts with matching the ejector punch to the die layout and the required point contact. Use the provided ranges to select the shank diameter (D = 5–32 mm) first, ensuring it fits the ejector guide and the mating bore without binding.

• Tip shape: pick the geometry (H, J, K, L, N, O, R, V, X, Y, Z) that matches your part contact area and prevents edge marking.
• Point length (L1): available as 13–19 mm, 19–25 mm, or 25–30 mm to control engagement depth at the cavity interface.
• P and W: select P = 1.3–16 mm and W = 1.6–10 mm to conform to your punch profile and supporting shoulder geometry.

Choose total length (L) from the available configurations (e.g., 40–80, 40–100, 50–100, or 63–100 mm) so the punch stroke reaches full ejection without overtravel. Tolerance/fit values are not provided here—apply standard die clearances for ejector guidance and ensure any interface tolerances are defined in your mold drawing.