Hardened Steel Key Flat Shank Shoulder Punches - RW Coating

Shoulder punches with a flat shank and stepped seating are used in precision punching and forming stations where the punch must stay aligned over repeated cycles. The RW coating variant is particularly suited for lines with higher contact friction and frequent part-to-part variation, helping stabilize wear patterns.

• Automotive connector and bracket stamping: Round/rectangle/oblong (and oblong-radius) tips support consistent blanking geometry while the hardened steel body maintains repeatable punch performance under heavy-load hits.
• Appliance and metal enclosure forming: The single-stepped shank geometry improves tool positioning and reduces micro-movement, supporting tight dimensional work when tooling is cycled at high throughput.
• Progressive-die fine features: Close-tolerance tip dimensions (P/W ranges) and controlled edge radius (R ~0.15) help preserve part accuracy while the RW coating reduces friction-related wear.

Choose this hardened-steel, RW-coated design when you need both long wear life and predictable guidance during repeated punching operations.

This series is offered in SKH40 equivalent (powdered high-speed steel) or SKH51 equivalent (M2), giving you a choice between good wear resistance and a more robust high-speed-grade performance. Both options are hardened steel, designed for punch/die applications where repeated impacts demand dimensional stability.

• SKH51 (M2 equivalent): Typically higher hot-work and wear capability for long production runs; can trade off toughness if pushed beyond its best operating window.
• SKH40 (powdered HSS equivalent): Powder metallurgy helps improve uniformity and wear behavior; balance depends on your duty cycle and load.

The RW coating is applied to reduce friction at the cutting/contact interface, improving wear resistance and lowering adhesive wear risk. Exact HRC hardness is not provided in the input data, so select the material grade based on your load, cycle rate, and required edge retention.

To select the correct punch, match the tip geometry and shank diameter to your die set’s clearances and the required cutting/blanking profile. Start by choosing the tip shape (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle) and then confirm the tip dimensions: P = 1–18 mm, with W = 1–6 mm and R = 0.15 mm where applicable.

• Shank fit: Use D = 3–25 mm to match the die guide bushing or hole size so the punch maintains alignment during impact.
• Length selection: Choose L from the available ranges (e.g., 40–100, 50–100, 60–100, 70–100, or 40–100 variants) based on your upper plate spacing and holder engagement.
• Full-length alteration options: LC values are provided (e.g., 27–99.9 or 32–99.9), which allow controlled adjustment for head thickness/length compensation.

Because the input specifies dimensional alteration ranges (LCT/LMT/PC/WC), treat these as configurable parameters to achieve the required stack height; verify tolerances and guided fit in your punch holder/die guide design.