WPC Treatment Tapped Punches

WPC-treated tapped punches are used in progressive and compound injection/molding-like metal-stamping tooling where punch height and regrind compensation must be maintained across production runs. The bolt-fixed structure supports quick punch swaps and height adjustment after edge regrinding, reducing downtime when tool edges are renewed.

• Narrow-pitch punching: The WPC surface treatment helps maintain wear resistance on small cutting edges, improving dimensional stability as the punch cycles repeatedly.
• High-tensile or thick-plate connector features: The fixable bolt design and available tapped large/extra-large diameter formats help address breakage risk when tapping larger diameters.
• Multi-tip interface tooling: Choose the appropriate tip shape (A, D, E, G, R) to match the tap geometry and lead-in requirements for consistent thread formation.

This variant is suited because the WPC treatment is specifically selected to support tooling wear performance while the bolt fixation streamlines maintenance for regrind-driven height changes.

This tapped punch series is offered in powdered high-speed steel and an SKD11-equivalent option, enabling selection based on wear vs. toughness needs.

• Powdered HSS: Designed for high hardness and strong wear resistance at the cutting edge; it supports stable performance under repeated punching when tool wear is the dominant failure mode.
• SKD11 (HRC reference): SKD11 is commonly treated to a working hardness around ~58–62 HRC with quench & temper, offering good wear resistance with improved toughness versus higher-carbo WW-style grades; trade-offs may include slightly lower wear life compared with very high-hardness options.

Surface treatments include HW coating and WPC. WPC is applied as a wear-focused surface treatment for demanding punching conditions. Final performance depends on the hardness level and the balance between edge wear resistance and toughness under bolt-fixed load during tapping and regrinding.

Select tapped punch dimensions by matching the tool’s shank and tip geometry to the mold/fixture feature that forms the tapped hole, then verify regrind compensation margins.

• Shank diameter (D): Choose from 5–25 mm. The shank diameter tolerance is +0.005/0, m5, so confirm fit with the punch holder bore to prevent chatter or misalignment.
• Tip dimension (P): Select 1.2–18 mm to match the required tap/tapping entry size. For fine correction, use the available alteration values: PC = 0.8–9 mm.
• Tip length / geometry: Use B options (L, S, X) and confirm full length alteration LC = 27–42 mm.
• Corner R: Tip corner radius is fixed at 0.15 mm (range shown as 0.15–0.15), so choose tip type accordingly rather than expecting radius variation.

Because this series supports height adjustment after edge regrinding, keep a margin in tool stack-up so the post-regrind height still maintains stable thread formation without bottoming.