SKD11 Equivalent Double Stepped Shoulder Punches

This double-stepped shoulder punch is used in die sets where blanking must be both repeatable and self-locating. The stepped shank improves seating control, helping maintain stable punch-to-die alignment during cyclic metal forming.

• Progressive/transfer dies for automotive and appliance parts: Use the double-step geometry to control shoulder engagement so the punch consistently returns to the same position, supporting uniform hole size and reduced scrap from misalignment.
• Precision blanking for thin-gauge sheet components: Choose SKD11-equivalent for durable wear performance under repeated contact with the die surface, helping sustain dimensional stability over long production runs.
• Multi-cavity die stations: The available range of shank diameter (D = 3–25 mm) and tip/step dimensions supports matching station-specific cavity/core layouts.

Available tool steels include SKH40 equivalent (powdered high-speed steel), SKH51 equivalent (AISI M2), and SKD11 equivalent (D2). These grades are selected to balance wear resistance with toughness for repeated punching contact.

• SKD11 (D2 equivalent): typically used for wear-focused punching due to high hardness after heat treatment. Expect a high hardness condition (often in the ~58–62 HRC range for D2-class steels), with good abrasion resistance but comparatively lower toughness than more ductile options.
• SKH51 (M2): better hot hardness/impact performance relative to higher-carbon cold-work steels, supporting stable cutting edges under demanding cycles.
• SKH40 (powdered HSS): powdered processing improves uniformity and wear behavior; often chosen when consistent edge durability is critical.

Heat treatment state is application-dependent; specify quenched & tempered (for D2-class) or HSS heat treatment when ordering to ensure the target hardness for your press load and material thickness.

Select the punch dimensions to match the die set’s cavity/core engagement and clearance requirements. Start with the shank diameter D and choose from D = 3–25 mm with the required tolerance +0.005/0 and m5 fit guidance. Correct shank fit supports stable guided movement and consistent shoulder seating.

• Tip/working geometry: Match P (tip dimension) = 0.5–9 mm and B (tip length) = 2–35, 2–45, 2–60, 2–19, 2–25, or 2–30 mm to your material thickness and required penetration.
• Step location control: Set the shoulder spacing using F = 2–5 mm (length from tip end to second step R). Verify full-length consistency with LC = 29–70.1 mm and total-length alteration tolerances (LCT and LMT) provided as 29–70.1 mm range values.
• Corner/rounding: Use the specified R = 0.15 mm to align with your die edge strategy.

Configuration is largely fixed by the chosen size set; tip shape options (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle) allow selection of the working profile while keeping the step logic consistent.