RW Coated Dowel Punches for Heavy Load - Single-Stepped Shank

RW-coated dowel punches are used in precision die-and-punch tooling where repeatable alignment must survive high forming forces. The single-stepped shank provides rigid guidance during the stroke, helping maintain stable positioning between the upper punch set and lower die block.

• Automotive and industrial stamping: Use them as center/punch components with a locating dowel hole to reduce misalignment under heavy press loads and repeated cycles.
• Progressive die stations: The stepped shank supports consistent slide-to-cavity registration, improving part-to-part repeatability when the press cycles rapidly.
• High-cycle forming inserts: The RW surface treatment is suited for applications where wear resistance at the punch/locating interface directly impacts dimensional stability.

These features—locating dowel hole support for alignment, single-stepped shank stiffness for guidance, and RW coating for wear behavior—make this variant appropriate for heavy-load, high-accuracy tooling.

This series is available in two high-speed steel options: SKH51 equivalent (M2) and SKH40 equivalent (powdered high-speed steel). Both selections are designed for tools that see sliding/impact during repetitive punching and locating.

• SKH51 (M2 equivalent): High hot/wear capability for heavy duty punching; typically balanced hardness and toughness to resist edge rounding while maintaining sufficient shock resistance.
• SKH40 (powdered HSS): Powdered processing improves micro-uniformity for wear performance; generally offers a favorable toughness/abrasion balance for high-cycle tooling.

Typical practice is to use a quenched and tempered heat treatment state for HSS punches, aiming for stable hardness (often in the high-HRC range) while managing the wear–toughness trade-off. RW coating further improves surface wear resistance at the contacting/dowel-guiding interface.

Start by matching the shank and locating geometry to the mating components. The shank diameter D = 10 ~ 45 mm must match the corresponding dowel/punch receiving bore to ensure proper guidance throughout the stroke.

• Choose tip shape (Round, Rectangle, Oblong, Double flatted round, Radius rectangle) based on the forming/centering requirement and available clearance in the die.
• Set tip size: Tip dimension P = 2.5 ~ 35 mm, with tip length options controlled by B (L or S) and tip corner radius R = 0.15 mm.
• Match overall length: L (L Dimension) is offered across ranges 60 ~ 150 mm (including 70 ~ 150 and 50 ~ 150 variants), and the full length alteration LC = 37 ~ 149.9 mm / tip dimension alteration PC = 1.25 ~ 17.5 mm are used to fine-tune projection.

Because an m5 shank diameter tolerance is specified, select mating holes/bores accordingly to achieve the intended fit (tight guidance without excessive binding).