Center Dowel Ejector Punches - Metric XNAP Coating

These center dowel ejector punches are used in injection molds where precise alignment during ejection is critical. They guide ejector motion through the mold assembly, helping maintain stable positioning and reducing side-load stress that can lead to stick-slip or uneven wear.

• Automotive connector and housing molds: For high-cycle production, the XNAP-coated bearing surfaces help improve sliding wear resistance, supporting consistent ejector travel over repeated cycles.
• Appliance and enclosure tooling: In molds with long ejector runs (fixed L = 71–130 mm), the metric shank options (D = 10–32 mm) support reliable fit-up with standard ejector guide hardware.
• Thin-wall parts with tight assembly tolerances: Use selectable tip shapes (H/J/K/L/N/O/R/V/X/Y/Z) to match the punch-to-dowel hole geometry and achieve repeatable ejection performance.

Choose this variant when you need both centered ejection and enhanced wear behavior for demanding production conditions.

The provided data specifies the coating concept (DAYTON XNAP coating) but does not list the underlying steel grade or heat treatment condition. Therefore, material properties, hardness (HRC), and heat treatment states cannot be confirmed from the given specification.

• Coating function (XNAP): Intended to improve sliding wear resistance for repeated mold cycles, supporting stable performance under production abrasion.
• Wear vs. toughness trade-off: Coatings generally enhance surface wear behavior while leaving the substrate to carry impact and bending loads; select geometry and fit to manage side-loads.
• Comparing available variants: The catalog options offered here are primarily tip shapes (H/J/K/L/N/O/R/V/X/Y/Z) and size ranges (D, L1), while no alternate steel/coating materials are stated in the input.

For a complete technical selection (HRC, nitriding/quench-temper, substrate wear/toughness), request the steel grade and heat treatment datasheet for series code 250301826468.

Select the punch dimensions by matching your mold’s ejector guide layout and the required engagement geometry for the dowel hole.

• Shank diameter (D): Choose from 10, 13, 16, 20, 25, 32 mm to fit the corresponding guide/bushing bore and maintain centered motion.
• Total punch length (L): Use the fixed range L = 71–130 mm to ensure correct protrusion through the mating ejector plate and full engagement without bottoming.
• Point length (L1): Match the available engagement length using L1 = 19–25 mm or 25–30 mm, depending on how deep the tip must enter the receiving pocket/hole.
• Tip geometry and offsets: Select the required tip shape (H/J/K/L/N/O/R/V/X/Y/Z). Then verify the cross features P (4–16 mm), W (4–10 mm), and R (0.2–4.975 to 0.2–15.975 mm) per your drawing.

Because only dimensional ranges are provided (no tolerance values), confirm final fit/clearance against your mold shop drawings and bushing/ejector hole tolerance stack before machining or assembly.