DIN Standard D2 SKD11 Steel Punches with Locating Dowel Hole - NW Coating

These DIN-style D2 SKD11 punches with a locating dowel hole are used in progressive and die-set tooling where repeatable punch-to-die alignment directly impacts part quality. The locating dowel hole supports stable center positioning during high-cycle stamping, helping reduce misalignment wear on punch faces and guide surfaces.

• Automotive connector and bracket dies: Select this variant when the press stroke and lubrication regime demand consistent punch registration; the controlled single-stepped shank plus dowel-hole location improves retention in the punch holder.
• Precision blanking and piercing: For multi-cavity or multi-station tooling using aligned punch systems, the dowel-hole geometry helps maintain concentricity while the tip shape and size are matched to the feature geometry.
• Die maintenance programs: The NW coating (DLC + WPC) is suited to extend service life by improving wear resistance on working surfaces under abrasive, production-load conditions.

This product is made from SKD11 steel (D2/SKD11 equivalent), a tool steel selected for die and punching applications requiring high wear resistance and adequate toughness. In typical practice for SKD11 (analogous to the D2 family), components are supplied heat-treated and then finished to final geometry; the working surfaces are designed to achieve a high hardness level for cutting and piercing stability.

• Hardness and performance trade-off: Higher hardness improves punch life and edge wear resistance, but excessive hardness can reduce toughness—so the coating and fit are important for crack resistance.
• Heat treatment state: Heat-treated die steel condition is assumed for DIN tooling usage; final hardness should be confirmed to your target die-set wear and impact conditions.
• Surface enhancement: The DLC + WPC system boosts wear resistance on the punch working surfaces compared with uncoated tooling.
• Material comparison: Relative to softer steels used for forming dies, SKD11/D2-type steels generally provide superior abrasion and edge retention, while requiring careful handling to avoid brittleness at the shank and tip corners.

To select the correct punch, start from the shank diameter D and the required engagement length in the punch holder. This series covers D = 10 ~ 45 mm, so match D to the guide/punch bushing bore and the holder step to ensure proper alignment with the locating dowel system.

• Tip geometry: Choose the required tip shape (Round, Rectangle, Oblong, Double flatted round, Radius rectangle) and then match the P (tip dimension) = 2.5 ~ 35 mm and W = 2.5 ~ 9 mm (plus the corresponding alteration value WC = 1.25 ~ 4.5 mm).
• Tip length and overall reach: Select B from the available L/S/X options, then verify L dimension ranges (50 ~ 150, 60 ~ 150, 40 ~ 150, 70 ~ 150, 80 ~ 150, etc.) to suit your die thickness and stripper spacing.
• Locating/fit considerations: Use the full-length alteration LC = 25 ~ 149.9 mm options to fine-tune standing height and clearance. The spec notes an m5 shank diameter tolerance, so confirm holder bore tolerance compatibility to achieve the intended controlled fit without binding.