Straight Punches - DLC (XCD) Coating

These straight punches with a DLC (XCD) surface are used in die and mold tool blocks where press-fit forming, guidance, and repeated contact demand stable performance. The straight geometry supports consistent alignment in both cold-working and feeder/transfer stations, helping maintain uniform piercing or forming force distribution over cycles.

• Automotive and industrial connector tooling: apply for long-run punch stations where sliding contact occurs between punch tip and forming die faces; the DLC (XCD) coating reduces friction and improves surface durability.
• Electronics enclosure and bracket molds: suitable for straight press-fit operations requiring controlled guidance; machined shanks improve repeatable assembly while the coating supports wear resistance under frequent part ejection/actuation.
• General die & progressive forming applications: compatible with SKH40/SKH51-equivalent steel bases for applications needing high-speed steel toughness with enhanced wear behavior at the contact surfaces.

With a controlled head thickness T = 5 mm, this variant is suited for tooling layouts that require consistent head-to-total-length relationships for assembly and long-term dimensional stability.

Base materials are offered in SKH40 equivalent (powdered high-speed steel) and SKH51 equivalent (M2). SKH40 is typically selected when a balance of wear resistance and toughness is required for stable guidance in repetitive punching, while SKH51/M2 is commonly chosen for higher wear capability in die and punch work.

For DLC (XCD) coated punches, the wear and friction performance is driven by the surface film on top of the hardened HSS substrate. While specific hardness values are not provided in the data, engineers should verify final hardness after tool heat treatment and before coating application to ensure the intended HRC level matches die-block requirements.

• Heat treatment (typical): quenched & tempered HSS substrate followed by DLC (XCD) coating for reduced sliding wear.
• Trade-off: increasing wear resistance via higher-hardness HSS states can slightly reduce toughness—select SKH40 vs SKH51 based on expected load, impact risk, and sliding distance.

To select the correct straight punch dimensions, match the nominal diameter and the tip dimension (P) to the die opening geometry and the press-fit/forming requirement. The nominal diameter range is 4–25 mm and tip dimension range is 3–20 mm.

• Choose working length: select L from the provided options (40–80, 40–100, or 40–120 mm) based on how much projection is required in the tool stack-up.
• Confirm full-length alteration (LC): pick the matching alteration range (20–80, 20–100, or 20–120 mm) for the intended adjustment/clearance strategy.
• Validate head thickness relationship: the head thickness is controlled at T = 5 mm, and the head thickness tolerance change with total length alteration is represented by LCT and LMT ranges (each offered as 20–80, 20–100, 20–120).

Where press-fit guidance is critical, confirm tolerance compatibility between punch and the mating die bore; the coated surface affects wear behavior but not the underlying dimensional interface, so verify your assembly fit using the selected diameter and length configuration.