M2 Steel Ball Lock Ejector Punches Wrench Flat

Ball-lock ejector punches are used to provide positive ejection in injection molding and related die sets, where the tool must repeatedly withstand high contact loads. This variant—with a wrench-flat shoulder for secure handling and consistent punch seating—fits well in cavity/core builds that require reliable installation and repeatable alignment.

• Automotive and industrial connector housing molds: The ball-lock retention helps maintain stability during fast cycling, reducing the risk of punch movement under asymmetric ejection forces.
• Heavy-load consumer/industrial parts (thick-wall injection molding): TiCN (XCN) coating supports wear resistance on the working surfaces, helping maintain ejection performance over extended production runs.
• Die maintenance/repair programs: The wrench-flat design simplifies wrenching during part replacement, improving serviceability while retaining a stable fit during rebuilds.

Built from M2 steel (TiCN-coated, SKH51 equivalent), it’s particularly suited where abrasion and repetitive load are dominant factors.

This ejector punch uses M2 steel, commonly referenced as SKH51 (M2 equivalent), selected for high hardness and abrasion resistance in ejection systems. The TiCN (XCN) coating further improves wear resistance at the punch-to-pocket/contact interface, supporting stable operation under high contact stress.

• Heat treatment: Hardened tool-steel construction is used for dimensional stability during production runs (exact HRC value and heat-treat cycle are not specified in the provided data).
• Performance trade-off: M2 steels deliver strong wear resistance, but the higher-carbon, high-alloy microstructure can reduce toughness compared with lower-alloy steels—making coating and proper fit critical for long life.
• Coating role: TiCN reduces surface wear and helps retain effective geometry during repeated ejection cycles.

If compared to uncoated or lower-wear grades, the TiCN-coated SKH51/M2 approach is typically favored for heavy-load molding where abrasion dominates.

Select punch dimensions by mapping the required working geometry to the tooling cavity/core and ensuring adequate clearance for movement and retention features. For this series, choose the shank diameter D first: 10, 13, 16, 20, or 25 mm, matching the ejection bore size and guiding requirements in the mold.

• Tip length / B: available as L or S variants (per system definition), and overall L dimension ranges of 80–100 mm or 71–100 mm depending on configuration.
• Full length alteration LC: fixed range 52–99.9 mm—use this to tune overall stack-up with your ejector retainer and base plate thickness.
• Tip geometry: select tip shape (e.g., round, rectangle, oblong, double-flatted round, radius rectangle) and set P (2.5–18 mm), PC (1.25–9 mm), W (2.5–6 mm), and optional WC / R values within the provided ranges.

Maintain tool clearance based on your mold machining tolerances. Because fit stability is critical for ball-lock retention, verify that your ejector bore and pocket dimensions are consistent with the selected D and chosen tip contour before final assembly.