Key Flat Shank Ejector Punches WPC Treatment

Key flat shank ejector punches with WPC surface treatment are used in injection mold tooling and secondary forming fixtures where the ejector system must stay aligned under repeated punching loads. The keyed, single-stepped flat shank helps prevent rotational drift, supporting stable forming and dependable part release across long production runs.

• Automotive connector and sensor housings: Ejector punches with spring-reinforced jector pin support consistent ejection accuracy for thin-wall or overmolded components, reducing risk of sticking when cycles repeat at speed.
• Appliance and consumer device inserts: The combination of keyed shank alignment and WPC treatment helps maintain smooth penetration and improved corrosion resistance in environments exposed to coolants and cleaning agents.
• Medical device housing components: Tip shapes such as round, rectangle, or radius-rectangle allow tuning to the cavity feature, while the stable jector pin construction supports repeatable release without damaging nearby surfaces.

This series is available in high-performance tool steels matched to heavy-load punching. Options include SKH40 equivalent (powdered high-speed steel), SKH51 equivalent (AISI M2), and SKD11 equivalent (D2), each balancing wear resistance and toughness for punch life.

• Wear resistance: SKH51 (M2) and SKD11 (D2) typically provide higher wear durability for abrasive or high-cycle conditions.
• Toughness trade-off: Compared with more wear-optimized grades, high-speed steels (e.g., SKH40/SKH51) generally support more robust performance against chipping under impact, while D2 is more sensitive to shock if misaligned.
• Surface treatment: This variant is offered with WPC for enhanced corrosion resistance and smoother punch penetration; HW coating is also available as an alternative.

Heat treatment state: The specific hardness and exact heat-treatment recipe are not provided in the input data, so hardness (HRC) should be confirmed per the selected steel and coating specification before final design sign-off.

Select dimensions by matching the ejector punch shank and tip geometry to the cavity/core feature and the required ejection stroke. This series provides D (shank diameter) from 4 to 25 mm and Jector options (standard or spring reinforced) to maintain ejection stability during cycling.

• Tip geometry fit: Choose P (tip dimension) from 1 to 18 mm, B (tip length) as L, S, or X, and confirm tip corner radius R = 0.15 mm (where applicable). The tip corner and face area should match the cavity feature to avoid localized stress.
• Total length mapping: Use L (40 to 80 mm) and LC (27 to 90.1 mm) / LCT / LMT ranges to align with your ejector plate stack-up and clearance allowances.
• Dimension alteration: PC (0.9 to 9 mm) and WC (1.8 to 5 mm) indicate allowable variation—ensure your CAD drawing references the selected alteration values to prevent interference.

Tolerance/fit note: Head thickness tolerance changes are reflected in LCT and LMT (27 to 90.1 mm ranges). Lock the exact variant to preserve correct fit with guide components and ejector plate thickness.