Center Dowel Punches for Heavy Load - Metric

Heavy-load center dowel punches are used in injection and stamping mold builds where repeatable die-to-die alignment is critical. This metric variant is typically installed in die/base plates to locate mating components during clamp cycles, helping maintain concentricity and reducing the risk of misalignment over high-volume production.

• Automotive connector and housing tooling: Use the dowel punches to stabilize multi-part inserts and runner block alignment under vibration and thermal expansion, leveraging the XNT DayTiN® coating for improved wear performance.
• Medical device housings and precision components: Reliable centering supports consistent cavity registration and uniform shut-off, which is important when tight dimensional control is required.
• High-cavitation molds and rapid changeover dies: The heavy-load design supports faster setup repeatability, while the available tip shapes help match different punch/insert interfaces for reliable seating.

The XNT DayTiN® coating and available tip geometries make this configuration well-suited for demanding production environments.

The provided specification identifies this as a metric heavy-load center dowel punch series with an XNT DayTiN® coating. While the input data does not specify the underlying steel grade or heat treatment (e.g., quench-and-temper or nitriding), the coating is selected to improve surface durability in sliding/locating contact during repeated cycles.

• Coating effect: XNT DayTiN® is intended to increase wear resistance at the point/guide contact zone, helping maintain alignment accuracy and reducing fretting wear in die interfaces.
• Hardness & trade-offs: Coatings typically improve wear and reduce adhesion, but they rely on a sound substrate for toughness; overly brittle substrates can still chip under heavy loads.

When multiple steel/coating combinations are available, engineers should balance substrate toughness (for impact resistance during clamp) against surface wear protection (for long-term centering stability).

Select the center dowel punch dimensions by matching the shank and locating features to the mating bushing/insert geometry in the mold base or die assembly. The series supports multiple tip shapes (H, J, K, L, N, O, R, V, X, Z) to fit different punch/insert interfaces—choose the tip shape that ensures full seating without interference.

• Shank diameter (D): Choose from 10, 13, 16, 20, 25 mm to match the locating bore/bushing diameter in the moving and fixed die plates.
• Point length (L1): Select within 13–19 mm or 19–25 mm based on required engagement depth for stable centering.
• Total length (L): Fixed at 80–130 mm; confirm clearance to avoid bottoming in the pocket or blind bore.
• Additional geometry (P, W, R): Use P = 1.5–18 mm, W = 1.5–6 mm, and R = 0.2–5 / 0.2–6.5 / 0.2–8 / 0.2–10 / 0.2–12.5 to match the mating profile requirements.

For press-fit or sliding locating designs, verify functional clearance and accommodate manufacturing tolerances so the dowels guide centering smoothly during clamp cycles.