Metric Dowel Punches for Heavy Load with Single-Stepped Shank (M5)

This heavy-load metric dowel punch is used in injection and stamping mold tooling where repeatable, high-force alignment between moving and fixed components is critical. Its single-stepped shank and locating dowel hole help maintain center guidance during ejection, forming, and punch press cycles.

• Progressive/transfer dies: The stepped shank geometry provides stable positional control, making it suited for center-guided stations that require consistent strip and punch alignment under load.
• Automotive connector housings: In multi-cavity molds with tight parting-line repeatability, the m5 shank diameter tolerance supports reliable registration between core slides, stripper plates, and locating features.
• Medical device housings: For clean, fine-tolerance components where flash control depends on alignment, the locating dowel hole improves repeatability and reduces misregistration-driven variation.

The variant is particularly suited because the single-stepped shank concentrates guidance at the intended interface, while the m5 fit supports stable alignment in corresponding guide components.

Two high-performance steel options are specified. SKH51 equivalent (M2) is a high-speed steel suited for punch edges and wear-heavy operations, offering excellent wear resistance with good hot hardness. SKH40 equivalent (powdered high-speed steel) is designed for improved uniformity and tool life in demanding cycles where consistent microstructure supports wear resistance.

• Hardness/heat treatment: Specific HRC values are not provided in the supplied data, so hardness should be confirmed to match your press load and edge geometry requirements.
• Wear vs. toughness: Higher edge hardness typically improves abrasive wear resistance but can reduce toughness if impact or misalignment is present—select the grade based on cycle severity.
• Manufacturing: These dowel punches are precision ground to meet the stated shank tolerance and maintain alignment features, supporting stable guidance through repeated load cycles.

For maximum edge durability, engineers often choose SKH51 (M2) where wear dominates; for consistent performance over long runs, SKH40 (powdered HSS) is commonly preferred where microstructure uniformity matters.

Selection starts with matching the shank and tip geometry to the mating guide and the punch working zone. This series provides shank diameter (D) values of 10, 13, 16, 20, 25 mm, so choose the diameter that corresponds to your guide bore or locating feature. The shank diameter is specified with m5 tolerance, which is intended to support stable alignment with the receiving guide component.

• Length (L): available ranges include 60–150, 70–150, and 50–150 mm depending on the configuration. Select L to reach the required guide engagement depth without over-constraining motion.
• Tip features: Tip shape options include Round, Rectangle, Oblong, Double flatted round, Radius rectangle. Tip dimension parameters include P: 2.5–18 mm, with corner radius R: 0.15–12.48 mm and tip width W: 2.5–24.97 mm (exact ranges depend on the selected tip shape).
• Full length alteration (LC) / tip alteration (PC): use LC values (37–149.9 and 42–149.9 mm) and PC (1.25–9 mm) to fine-tune engagement and working protrusion.

When fitting, ensure the m5 shank tolerance is paired with the appropriate mating bore tolerance to avoid binding while maintaining guidance stiffness. Confirm that tip alteration (PC/ WC) aligns with your cavity/core clearance and stripper plate space.