WPC Treatment Center Dowel Punches for Heavy Load with Dowel Holes - W-AP Steel Stepped Shank

These WPC-treated center dowel punches are used in injection/molding-related forming and assembly tooling where strict repeatability of the punch center is required under load. The single-stepped shank incorporates a locating dowel hole, which helps maintain alignment during high-cycle operations and improves consistency of punch positioning in progressive tool stations.

• Progressive dies and compound press tooling: The dowel hole shank supports stable guidance for center hits, reducing drift when multiple stations share the same locating scheme.
• Automotive and appliance metal forming runs: WPC surface treatment enhances wear resistance in heavy-duty cycles, supporting longer intervals between regrinds while keeping tip geometry stable.
• Die blocks with dowel-guided cores/holders: The shank diameter is specified ground to m5 tolerance, improving fit in die blocks and helping prevent center-to-cavity misalignment.

Choose this variant when your tooling design needs a dowel-guided punch center plus durable surface performance for heavy-load operations.

This series is available in two high-speed steel options: SKH51 Equivalent (AISI M2) and SKH40 Equivalent (powdered high-speed steel). Both grades are intended for punching components that see sliding contact and repeated mechanical loading; the main difference is that the powdered route in SKH40 typically supports improved micro-uniformity and consistent performance under cyclic stress.

• Wear resistance vs. toughness trade-off: SKH51 (M2) generally provides strong wear resistance for high-speed punch work, while SKH40’s powdered steel form can offer more stable toughness characteristics depending on heat treatment.
• Heat treatment state: The punches are WPC-treated, indicating a surface treatment meant to increase surface durability and reduce wear during heavy-duty cycles.
• Hardness: Hardness values are not provided in the supplied data; confirm final HRC based on your requested heat treatment and application load profile.

For maximum cycle life in abrasive or high-contact environments, prioritize SKH51 for wear-focused designs or SKH40 when you need consistent performance from powdered steel.

Start dimensioning from the guided shank and tip geometry. Select the D (shank diameter) in the offered range of 10, 13, 16, 20, or 25 mm. The shank is specified ground to m5 tolerance, so the mating bore in the die block should be designed to achieve a controlled fit and minimize center play.

• Match overall length: Choose L within the available ranges (e.g., 60–150, 70–150, 50–150, or 50–150 as applicable to the variant) and ensure clearance for the press stroke and holder height.
• Tip dimensions: Verify the P (tip dimension) range of 2.5–18 mm and the tip corner R range (0.15–4.98 mm up to 0.15–12.48 mm depending on profile) to suit your die opening and cutting/forming radii.
• Profile features and tolerance stack: Confirm PC (tip dimension alteration) and WC (tip dimension alteration) so the effective tip size accounts for regrind and fixture offsets.

When selecting between configured tip shapes (Round, Rectangle, Oblong, Double flatted round, Radius rectangle), use LC (full length alteration) to match the required seating and engagement depth in your punch holder.