Metric Steel Center Dowel Ejector Punches XNT DayTiN® Coating

These center-dowel ejector punches are used in injection molding and precision die tooling where repeatable centering and smooth stroke-to-stroke ejection are critical. The keyed shank and center-dowel geometry help maintain alignment through the ejection phase, reducing side loading on the guide components.

• Automotive connector and bracket molds: In high-cycle tooling, the XNT DayTiN® coated surface supports consistent ejection with improved resistance to scuffing and abrasive wear from repeated contact during cycling.
• Electronics housings and enclosures: The stable centering reduces misalignment-related flash risk in thin-wall parts by keeping the ejector action coaxial during opening.
• General forming and progressive die sets: Available tip shapes (H, J, K, L, N, O, R, V, X, Y, Z) and metric sizing make it easier to match existing die layouts while supporting reliable punching/ejection in dependable forming operations.

The product data provided specifies the XNT DayTiN® coating focus for stable ejection and tool durability, but it does not list the underlying steel grade or a corresponding heat-treatment state (e.g., quenched & tempered, nitrided). For selection at the tooling level, treat the coating as the primary functional specification available here.

• XNT DayTiN® coating: Designed to enhance surface wear resistance and help maintain low friction during repeated punch/dowel contact.
• Wear vs. toughness trade-off: Coatings generally improve abrasion/scuff resistance at the surface while relying on the base steel’s toughness for impact and bending performance; since base hardness and grade are not provided, verify with the supplier’s technical datasheet for critical load cases.
• Heat treatment & hardness: Not specified in the provided information—confirm hardness (HRC) and heat treatment state for tool-life calculations.

Select the ejector punch dimensions by matching the shank diameter and working length to the guide system, then tune the point geometry to the cavity/core clearance and ejection requirement.

• Shank diameter (D, mm): choose from 10, 13, 16, 20, 25, 32 to fit the die guide and dowel hole sizing.
• Overall length (L, mm): fixed range 71 ～ 130—select based on shut height, stroke envelope, and clearance to the back plate.
• Point length (L1, mm): options 19 ～ 25 or 25 ～ 30 to control penetration depth and contact area at ejection.
• Other geometry controls: match P (4 ～ 16 mm), W (4 ～ 10 mm), and R (0.2 ～ 4.975 up to 0.2 ～ 15.975 mm depending on configuration) to the required profile and clearance to reduce edge stress.

Confirm tolerances and fit using your die designer’s standard (e.g., guide hole and dowel clearance). The only fixed dimension stated is the overall length range (L), while D, tip shape, L1, P, W, and R are variable by configuration.