Key Flat Shank Shoulder Punches RX/HX Coated

These key flat shank shoulder punches are used in precision die sets and press tooling where the punch must stay aligned during repeated blanking operations. The flat-shank shoulder geometry supports stable seating and reduces the risk of punch wandering, which helps deliver repeatable blank outlines at production speed.

• Automotive and electronic connector stamping: Choose the RX/HX coated variant to improve surface stability and reduce friction, supporting cleaner cut edges and longer punch service intervals when running high-volume parts.
• Thin-gauge metal forming and blanking: The SKH51-equivalent (M2) tool steel option is suited for jobs that demand wear resistance while maintaining dimensional stability through repeated cycles.
• General industrial press/die applications: Use the shoulder punch in stations where consistent depth and controlled tip form (round/rectangle/oblong variants) are required to produce predictable features.

With RX or HX surface treatment available, this product variant is particularly suited for demanding machining environments that benefit from reduced wear and more consistent punching results.

This series is offered in two SK-equivalent tool steels: SKH40 (powdered high-speed steel) and SKH51 equivalent (M2). Both are high-speed steel grades commonly selected for punching due to their ability to maintain hardness under cutting heat and provide good wear resistance.

• SKH51 equivalent (M2): Typically used when higher wear resistance and dimensional stability are priorities. The M2 family is generally hardened to around HRC ~60–65 (grade-dependent), trading some toughness for improved resistance to abrasive wear.
• SKH40 (powdered HSS): Powder metallurgy helps refine microstructure, supporting tougher performance versus conventional HSS while still providing strong wear characteristics.

Surface treatment options are HX coating or RX coating, both described as Al-Cr + nitriding treatment. The coating/nitriding combination improves surface hardness and reduces friction, helping extend tool life in repetitive punching.

Select this punch by matching the shank diameter (D) to the guide/support bore and then selecting a compatible tip geometry to match the die feature. The series supports D = 3 ~ 25 mm and tip dimensions with P = 1 ~ 18 mm, with multiple tip shapes including round, rectangle, oblong, double flatted round, and radius rectangle.

• Length control: Choose L within the available ranges (e.g., 40–100 and other listed step ranges up to 70–100). If your press stroke requires a specific protrusion, verify LC (full length alteration) and related length alteration parameters (such as LCT and LMT ranges shown in the data).
• Tip form tolerances/fit: Use the listed tip dimension alteration values (PC = 1 ~ 9 mm, WC = 1 ~ 3 mm) to align with expected grinding/adjustment allowances in your die build.
• Corner geometry: Confirm R = 0.15 and W = 1 ~ 6 mm / W-related parameters so the punched feature matches your cavity/core edge profile.

When ordering, keep fixed dimensions (D, selected tip shape) consistent with your die tooling, and use the provided alteration/length parameters to fine-tune assembled punch height.