Key Flat Shank Shoulder Punches (HW Coating, WPC Treatment)

These key flat shank shoulder punches are designed for heavy-load forming where punch positioning and shoulder seating stability are critical. The stepped shank geometry provides consistent guidance under high cutting forces, helping maintain alignment during repeated press cycles.

• Automotive and industrial stamping: Use the shoulder design to achieve stable seating in die sets, reducing punch wobble and helping produce consistent hole geometry at higher throughput. HW-coated or WPC-treated variants are suited for abrasive wear conditions.
• Appliance and housings manufacturing: When forming operations require reliable part outline definition, the flat shank and head thickness tolerance behavior supports repeatable engagement and clean cutting edges.
• General punch press/die applications: Select the appropriate tip shape (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle) to match feature geometry while leveraging the durable coating/treatment to extend tool service intervals.

This series is offered in multiple steel grades tailored to wear and toughness requirements: SKH40 equivalent (powdered high-speed steel), SKH51 equivalent (M2), and SKD11 equivalent (D2). Heat treatment is specified by grade/variant availability on the product line; in general, high-speed steels are typically supplied in a hardened condition and balance wear resistance with better hot hardness, while D2 is commonly used for high wear resistance at the expense of reduced toughness versus HSS in severe shock conditions.

• HW coating: increases surface hardness and abrasion resistance to improve punch stability during extended forming.
• WPC treatment: provides additional wear performance for hard, repetitive cutting environments.

Hardness and wear-toughness trade-offs depend on the selected grade (SKH40/SKH51 vs. SKD11) and surface treatment combination.

Select dimensions by matching the punch tip geometry to the die opening and by ensuring shoulder seating stability. Start with the shank diameter (D) in the range of 3 ~ 25 mm so the punch runs correctly in the guiding land while maintaining the required fit in the holder.

• Tip size: Choose tip dimension P (1 ~ 18 mm) and tip length B (L, S, X) according to the cavity depth and required cutting penetration.
• Overall length: Verify L from the available ranges (40–100, 50–100, 60–100, 70–100, and the listed “40–100” variant). Use LC (27 ~ 99.9 mm) and tolerance-change parameters LCT/LMT (27 ~ 99.9 or 32 ~ 99.9 depending on variant listing) to confirm how length changes relate to head thickness tolerance behavior.
• Tip geometry controls: Use PC (0.5 ~ 9 mm), W (1 ~ 6 mm), and corner radius R (listed as 0.15 mm) to ensure the formed feature matches your drawing.

Prefer the closest listed dimension set for first-pass fit; minor differences are managed by die clearances and the selected tolerance behavior (LCT/LMT).