M2 Steel Ball Lock Ejector Punches Heavy Duty XNP Coating

These heavy-duty ball lock ejector punches are used in injection mold tooling where parts must be retained and released with consistent force during every cycle. The ball-lock interface benefits from the secure locating geometry, helping stabilize the punch under ejecting loads and reducing the risk of lockup inconsistency.

• Automotive connector and housing molds: Ideal for repeatable ejection accuracy in high-cycle production, where wear at the lock interface can degrade part release quality over time. The heavy-duty ball-lock tip and XNP coating support long service life.
• Appliance and consumer electronics enclosures: Suited for molds that require robust ejector components to handle varying part geometry and ejection timing. The point-to-shank form supports alignment in the ejector system.
• General industrial housings with thick ribs: Useful when stable ball lock retention helps prevent premature unlocking during core movement and ejection.

This variant is manufactured from M2 steel (commonly associated with AISI M2 high-speed steel). M2 provides a strong balance of wear resistance and toughness for ejector components exposed to sliding contact at the lock interface.

• Wear resistance: High hardness supports extended service life where repeated ejection causes abrasion.
• Toughness trade-off: As hardness increases, impact toughness can decrease; proper heat treatment and polishing help mitigate chipping risk.
• Heat treatment state: Typically supplied in a hardened condition suited for tooling use; specific hardness and temper details are not provided in the input data.

An XNP coating is applied to further improve surface wear performance at the ball-lock contact areas, helping maintain stable retention behavior over long production runs.

Select the shank diameter D to match the ejector guide and the corresponding bore in the mold base where the punch operates. Available D sizes are 13, 16, 20, 25, 32, 40 mm, and choosing the correct diameter is essential for proper fit, alignment, and load distribution.

• Length selection: Overall L is fixed at 80 to 100 mm. Point length L1 is fixed at 19 to 30 mm, which determines effective engagement depth for the lock-and-eject action.
• Tip geometry: Tip shape is variable (H, J, K, L, N, O, R, V, X, Y, Z), and should be selected based on available space and the required ball-lock engagement profile.
• Key interface dimensions: Verify P (13.1 to 40.1 mm), W (1.57 to 34.73 mm), and R (0.2 up to 16/19/20/22/25/28 depending on variant) against the mating lock features.

For best performance, confirm the mating dimensions and tolerances in the ejector plate/core side to ensure consistent ball retention under repeated cycles.