Metric Center Dowel Ejector Punches | XN DayTride Coating

Metric center dowel ejector punches are used inside injection mold tooling where punch-to-plate alignment must remain stable across high-cycle ejection. The built-in center dowel geometry helps maintain concentric guiding of the ejector punch during repeated strokes, reducing side load and improving consistency of part release.

• Automotive connector and housing molds: suited for die cavities that require repeatable ejection timing and accurate alignment, especially when the ejector system sees continuous duty cycles. The center dowel guidance and XN DayTride® wear-focused coating help preserve performance under friction and abrasive contact.
• Consumer electronics enclosure molds: for thin-wall or precision inserts where punch wandering can create surface defects. Selecting the appropriate tip shape (X, R, K, O, H, L, J, N, V, Y, Z) allows matching contact geometry to the gate/parting load profile.
• Medical device housings: for stringent dimensional stability requirements in production runs. The guiding function supports smooth ejection while the coating supports long service life in abrasive wear environments.

Material and heat-treatment details are not provided in the supplied specifications for this center dowel ejector punch series. However, the product variant explicitly features an XN DayTride® coating, which is intended to improve wear resistance at the sliding/impact interface during ejection.

• Coating role: reduces abrasive wear and helps maintain punch dimensions and guiding performance over long production cycles.
• Wear vs. toughness trade-off: coated tool surfaces generally improve surface durability, while bulk toughness is primarily governed by the underlying base steel (not specified here).
• Material comparison: no alternate steel grades are listed for this item, so hardness (HRC) and specific heat-treatment state (e.g., quench & temper, nitriding) cannot be stated from the provided data.

Selection starts by matching the shank diameter D and the overall L to your ejector system clearance and stroke geometry. This series offers D = 10, 13, 16, 20, 25, or 32 mm, and a fixed L = 71 to 130 mm range depending on the selected configuration.

• Point engagement: choose L1 (Point Length) as 19–25 mm or 25–30 mm to control how far the punch tip enters the part or insert region.
• Tip geometry: select the correct tip shape (H, J, K, L, N, O, R, V, X, Y, Z) to match the required contact area and load path.
• Dowel-related clearance features: confirm P = 4–16 mm and W = 4–10 mm against your punch guide/bushing and locating design constraints.
• Radius/edge profile: ensure the specified R dimension (multiple ranges: 0.2–4.975 up to 0.2–15.975 depending on build) matches the desired contact smoothness.

Tolerance and fit values are not specified in the provided data; engineers should apply their standard ejector/punch fit and verify clearance against the guide and ejector plate machining limits.