Metric Center Dowel Regular Punches XNP Coating

These center dowel regular punches are used in precision injection and die tooling where repeated part positioning must remain stable over long production runs. They are typically installed in automotive connector and small hardware molds to maintain consistent alignment of inserts, pins, and ejector-related features. The regular center punch profile helps guide workpieces during closing, supporting accurate locating before cavity fill and during ejection.

In medical device housings and other high-mix, tight-tolerance assemblies, the XNP surface finish supports long tool life under frequent impact and sliding contact. This makes the punch suitable for die sets that cycle rapidly or handle textured/abrasive components where wear can degrade centering accuracy.

• Automotive connector molds: supports consistent centering to reduce variation across multi-part runs.
• Medical device housings: XNP coating improves wear resistance for reliable locating over many cycles.
• Die sets with ejector/inserts: point and shank geometry with selectable tip shapes enables process-fit for different part interfaces.

The provided configuration specifies the coating state rather than the underlying steel grade. As a result, material properties are described in terms of the functional surface treatment: the XNP coating is intended to improve wear resistance at the punch point and along the contacting shank area.

For heat treatment, the specific tempering condition (e.g., quenched & tempered, nitrided) is not listed in the input data. In general die-punch tooling, hardness and toughness are balanced so the punch withstands repeated loads without chipping or plastic deformation, while the surface finish controls abrasive wear.

• Wear resistance: prioritized by the XNP surface, supporting longer tool life during high-cycle locating.
• Toughness trade-off: higher surface hardness can reduce impact toughness if the base steel is too brittle—select a grade/process aligned to your press/load profile.
• Material comparison: not selectable from the provided data; when alternate steels are offered, choose based on impact vs. wear emphasis.

Select dimensions by matching the punch’s shank and working point to the die block features that house the locating function. The shank diameter D is available at 10, 13, 16, 20, 25, or 32 mm; choose the D that fits your mating bore in the die set with the appropriate clearance for insertion and guidance.

The overall length L is fixed within the range 71 to 150 mm. Use this to ensure the punch reaches the required engagement depth without bottoming in the component pocket.

• Point length L1: choose from 19–25 mm or 25–30 mm depending on the required penetration and locating contact area.
• P and W: these dimensions are variable (P: 4–16 mm, W: 4–10 mm) and should align with your part interface geometry and clearance envelopes.
• R radius: available at multiple ranges (e.g., 0.2–4.975 up to 0.2–15.975)—select based on tip contact stress and edge durability needs.

Tip shapes are configurable via H, J, K, L, N, O, R, V, X, Y, Z; confirm the chosen profile mates with the part surface to achieve stable locating.