DIN Standard Center Dowel Ejector Punches - Metric with XNAD Coating

This metric center dowel ejector punch variant is used in injection mold tooling where repeatable ejection alignment is critical. In automotive connector and sensor housing molds, the center-locating dowel geometry helps keep ejector travel stable during fast press cycling, reducing the risk of side loading as parts release.

It is also well suited for appliance and consumer electronics cavity tools that use ejector systems with multiple moving elements. The locating-focused layout supports consistent positioning across production runs, while the XNAD coating is intended to improve sliding behavior and limit galling/abrasion at contact surfaces.

• Supports precision ejection alignment for DIN-standard tooling
• Helps maintain repeatability under cycling load
• Coating helps protect wear-prone interfaces in ejector assemblies

For this product, the provided metadata emphasizes a DIN-standard tool steel construction and a XNAD coating aimed at improving wear and sliding performance. The exact steel grade and quantified heat-treatment state (e.g., quench & temper hardness in HRC, nitriding, carburizing) are not specified in the input data, so material selection and hardness targets should be confirmed with the manufacturing documentation for your build.

From a process perspective, the manufacturing route typically involves machining to DIN ejector tolerances, followed by surface treatment to establish the coating for improved tribological behavior. The coating trade-off is straightforward: higher surface hardness/low-friction behavior improves abrasion resistance, but final performance depends on interface fit and alignment to avoid concentrated loading.

• XNAD coating: intended to reduce galling and abrasion
• Steel grade/heat treatment: not specified in input—verify for HRC

Correct dimensioning starts with matching the ejector punch shank and working geometry to the mold’s ejector plate and guide system. Select the D (shank diameter) from 10, 13, 16, 20, 25, or 32 mm to suit the corresponding bore/guide in your moving plate and alignment features.

Next, choose the L (length) from 71–130 mm, ensuring you maintain sufficient engagement through the ejector assembly without bottoming. For the functional tip, select L1 (point length) from 19–25 mm or 25–30 mm, based on the required projection into the cavity and part release depth.

• Tip shape: pick from H, J, K, L, N, O, R, V, X, Y, Z to match the part’s ejection face
• P (4–16 mm) and W (4–10 mm): match to the mating clearance/geometry around the dowel hole system
• R: select the radius range (e.g., 0.2–4.975 up to 0.2–15.975 mm) consistent with the mold clearance requirements