Center Dowel Regular Punches - Metric, XNM Coating

Center dowel punches with controlled friction are used to lock die-to-die positioning in progressive and transfer press tooling, where alignment repeatability directly affects strip feeding, blank registration, and formed part tolerances. These regular center punches support stable locating through repeated strokes by providing a consistent shank bearing surface and a controlled tip contact profile.

• Automotive and appliance forming lines: Select the appropriate point length and tip shape to match the die contact area, helping maintain die alignment during high-cycle forming and blanking operations.
• Electrical connector and terminal tooling: Use the metric dowel geometry and XNM coating variant to promote smooth stroke performance, reducing stick-slip that can shift registration over long runs.
• Packaging and thin-gauge stamping: The varied tip shapes (H, J, K, L, N, O, R, V, X, Y, Z) and configurable dimensions help tune point engagement for the specific die pocket profile and wear behavior.

The XNM coating is suited for production environments where stable, repeatable contact supports consistent part positioning.

The provided data specifies an XNM coating variant for these metric center dowel regular punches, intended to support controlled friction and wear behavior during press operation. However, the dataset does not list the underlying steel grade, hardness, or heat treatment state, so those properties cannot be stated accurately for this specific SKU.

• Coating function: The XNM coating is designed to help reduce wear and maintain smooth stroke performance, which supports stable die alignment over repeated cycles.
• Tip geometry impact: Selecting the correct tip shape (H, J, K, L, N, O, R, V, X, Y, Z) affects contact stresses and how the coated surface wears against the mating die.

If you need a heat-treatment comparison (e.g., nitrided vs. quenched-and-tempered) or target hardness (HRC), share the specific steel/material specification from your drawing or quote sheet so the correct properties can be matched.

To select the correct center dowel regular punch dimensions, match the shank diameter D and the overall length L range to the die block and locating-hole depth. This product uses fixed L (71–150 mm) and variable shank diameter D of 10, 13, 16, 20, 25, or 32 mm.

• Select D (shank dia.) to fit the die’s center locating-hole or bore: choose the diameter that corresponds to your tooling standard for die alignment.
• Set point engagement using L1: choose L1 = 19–25 mm or L1 = 25–30 mm based on desired point reach into the die pocket/contact zone.
• Configure tip geometry with the P and W dimensions (P = 4–16 mm, W = 4–10 mm) and the R radius (available ranges include 0.2–4.975, 0.2–6.475, 0.2–7.975, 0.2–9.975, 0.2–12.475, 0.2–15.975) to suit your die contact profile.

Keep tolerance stack-up in mind: verify that your mating hole tolerance and punch shank size provide the intended locating clearance for reliable alignment through the press cycle.