M2 Steel Ball Lock Ejector Punches - Heavy Duty

These heavy-duty ball-lock ejector punches are used inside metric injection molds to drive consistent part expulsion while maintaining reliable ball-lock retention. The ball-lock geometry helps keep ejector action stable across repeated cycles, which is especially valuable when ejector alignment is critical.

• Automotive & industrial housings: Suitable for ejecting flat or slightly undercut components where robust punch strength and repeatable lock-up reduce the risk of sticking or mis-indexing.
• Electrical connector overmolds: The XNAD-coated surface supports smoother sliding under production loads, helping maintain stable ejection forces and lower wear at the punch/guide interfaces.
• General die applications in higher wear environments: M2 steel provides the wear-resistant, tough foundation for long-running cavity/core systems that must sustain repeated ejector strokes.

The XNAD coating plus M2 construction is selected to balance friction reduction and durability, improving performance during continuous ejection in metric tooling.

Core material options for these punches include M2 and PS4. M2 steel is an AISI M2 equivalent high-speed steel typically selected for its strong wear resistance in tooling contacts, with toughness adequate for demanding ejector duty. Typical hardness for M2 in mold tooling is commonly in the ~60–66 HRC range after proper heat treatment (quench and temper), which supports surface durability while allowing controlled toughness.

• XNAD coating (surface): Designed to reduce friction and improve surface performance, helping mitigate sliding wear during ejector cycles.
• PS4 (alternative material): Offered when application conditions prefer a different balance of hardness/toughness or wear behavior compared with M2.

In practice, the trade-off is that higher hardness improves wear resistance but can reduce impact toughness if heat treatment is not optimized; the selected M2 grade plus coating targets stable ejection under repeat loading.

Select the ejector punch size by matching the shank diameter (D), overall length (L), and the point length (L1) to the mold’s core/cavity stack and ejector travel requirements. This series provides D = 10–40 mm and multiple length families such as L = 63–100, 63–125, 71–125, or 80–125 mm.

• Check cavity/core engagement: Use the required L1 (point length) from the available options: 10–19 mm, 13–25 mm, or 19–30 mm.
• Confirm ejector travel & mounting: Ensure the selected L allows full stroke while maintaining proper support in the guide/holder.
• Verify locking interface geometry: The ball-lock profile is determined by the chosen tip shape (H, J, K, L, N, O, R, V, X, Y, Z) and the Jektole group (J4M, J6M, J9M, J12M).

For fit, treat P (1.5–12 mm) and W (1.5–14 mm) as geometry-critical dimensions for lock-up—match them to the mating ejector pocket/ball-lock features. Coating presence (XNAD) can slightly affect effective surface friction but does not replace dimensional matching.