Ball Lock Ejector Punches - Light Duty, Metric

Ball-lock ejector punches are used in precision injection mold tooling where the ejection point must stay stable under repeated cycling. In compact automotive connector housings and clip-style parts, the ball-lock tip helps maintain punch point retention, supporting consistent part release without drift.

For consumer electronics and small appliance components that require light-duty ejection forces, this light-duty metric variant aligns with standard metric tool design practices. The XCN coating is suitable for applications with frequent mold opening/closing, helping improve wear resistance at the contacting surfaces.

• Automotive connector molds: controlled ejection with improved point retention under cyclic load.
• Medical device housings (light duty): stable, repeatable ejection for tight assembly tolerances.
• Electronics housings & snap-fit parts: long-life performance for compact mold layouts.

The metric shank diameters and fixed point length range make it easier to match existing ejector systems while relying on the coating for enhanced durability.

The provided specifications focus on geometry and coating, not an explicit steel grade or hardness figure. For this series, performance is primarily driven by the XCN coating, which is intended to improve surface wear resistance during repeated ejection cycles.

In typical ejector punch service, the steel substrate must balance toughness (to resist chipping from cyclic impact) and wear resistance (to maintain the point profile). With the XCN layer, designers can target longer service intervals by reducing abrasive and contact wear at the punch tip.

• Heat treatment state: not specified in the input data; confirm the supplier’s hardness and treatment condition for final press-fit and tool-life calculations.
• Coating effect: XCN supports stable ejection performance by protecting critical contacting areas.
• Trade-off: a harder surface improves wear, while the base steel’s toughness reduces brittle failure risk.

When comparing variants, prioritize the coating quality and substrate toughness—especially when the mold uses high cycle rates or textured cavities.

Select the ejector punch dimensions by matching the cavity/core ejector stroke needs and available daylight in the mold. This series uses fixed overall length and point length, so the primary selection lever is shank diameter (D), tip shape, and the intermediate geometry parameters.

• Fixed lengths: L1 (point length) 19 ～ 30 mm and L (overall length) 80 ～ 100 mm. Ensure the available space in the mold base and return path accommodates L.
• Shank diameter options (D, mm): 13, 16, 20, 25, 32. Choose the D that fits your ejector guide bore while maintaining clearance to avoid binding.
• Variable sizing: P ranges 13.1 ～ 32 (with series-dependent step ranges including 16.1 ～ 38, 20.1 ～ 40, 25.1 ～ 44, 32.1 ～ 50), and W ranges 1.57 ～ 27.8; R ranges 0.2 ～ 16 / 19 / 20 / 22 / 25 depending on the option.

Start from the mold’s required ejector alignment, then confirm that the chosen tip shape (H, J, K, L, N, O, R, V, X, Y, Z) matches the target part geometry at the ejection contact area. If you have tight guide-to-punch clearances, verify fit by checking the ejector bore ID versus the selected D and any specified tolerance class from the system design—tolerances are not provided in the input.