Key Groove Punches with DLC Coating WPC Treatment

These key groove punches are used in injection mold and die tooling where the punch must seat consistently and stay aligned during repeated cutting or forming. The single-stepped shank with a keyed mounting profile provides positive location, helping maintain punch-to-holder repeatability over production cycles.

• Precision automotive connector or terminal tooling: Keyed alignment improves repeatability in multi-cavity or progressive dies, reducing cumulative misalignment during successive operations.
• Medical device component forming fixtures: The DLC surface system supports stable wear behavior under repeated punching, helping maintain sharpness and dimensional consistency for small features.
• General high-cycle punching inserts: The WPC foundation option is selected when improved wear resistance and surface durability are prioritized for long run times.

Choose this variant when controlled fit at the key-groove mounting and predictable punch seating are required.

These punches are available in powdered high-speed steel or SKH51. SKH51 corresponds to AISI M2 class high-speed steel and is commonly selected for its strong wear resistance under high-contact, cutting-style loads.

The surface system is offered as either without DLC foundation or with a DLC coating on WPC foundation (WPC). The WPC foundation variant is intended to improve durability by supporting the DLC film under repeated sliding and punching impacts.

• Hardness: The hardness is not specified in the provided data; final hardness typically depends on the supplied SKH51 grade and the heat-treatment recipe used by the manufacturer.
• Wear vs. toughness trade-off: DLC surfaces generally enhance wear resistance, while the underlying tool steel’s toughness supports resistance to chipping and edge damage.

Confirm the exact heat-treatment state and target hardness for your cavity cycle requirements during quoting.

Selection starts with matching the punch shank and tip geometry to the corresponding punch holder and die cavity/core. This product supports shank diameter D = 3 ~ 16 mm with a specified fit reference of +0.005/0 and m5, and a keyed profile for controlled placement.

• Tip shape: Choose the required tip profile from A, D, E, G, R.
• Tip geometry: Tip dimension parameters include P = 1 ~ 10 mm, W = 1 ~ 5 mm, and tip corner radius R = 0.15 mm (as provided). Apply the allowed tip variation using PC = 0.5 ~ 5 mm and WC = 0.8 ~ 2 mm if your design requires accommodation.
• Length matching: Use L = 40 ~ 70 mm and select full length alteration ranges via LC (32 ~ 79.9 / 32 ~ 99.9 / 27 ~ 79.9 depending on configuration) to achieve correct protrusion.

Verify that the keyed groove position T = 5.1 ~ 80 mm (or up to 100 mm) matches the holder’s locating feature to prevent rotational or axial seating errors. Tolerance-sensitive interfaces should be validated with the provided D (m5) fit reference.