M2 Steel Ball Lock Ejector Punches - Light Duty Metric CRN Coating

These M2 ball-lock ejector punches are used in injection mold tooling where reliable, repeatable ejection is needed under controlled load cycles. The ball-lock format provides stable retention in the die set, helping maintain consistent punch alignment during part stripping.

Scenario 1: Precision consumer and electronic housings — In molds producing thin-walled metric parts, light-duty ejection benefits from the compact punch stroke geometry and secure locking, reducing the risk of pitch or dwell variation between cycles.

Scenario 2: Automotive interior trim and connector brackets — For housings and brackets molded with tight dimensional requirements, the CRN coating variant supports improved abrasion resistance at the contact face, supporting stable ejection across repeated runs.

Scenario 3: Small die sets with frequent changeovers — When tooling is swapped regularly, maintaining consistent surface condition at the punch tip helps preserve ejection performance.

• The CRN coating is suited for wear-focused, light-duty ejection environments.
• Selectable tip shapes (H, J, K, L, N, O, R, V, X, Y, Z) allow matching the punch contact condition to the product’s release requirements.

This series is available in M2 and PS4 steels, supporting different balances of wear resistance and toughness for light-duty ejector applications. The M2 option is a high-speed steel equivalent in industrial usage (commonly associated with AISI M2 / HSS) and is typically heat treated to achieve high hardness for abrasion resistance.

M2 with CRN coating is designed for improved surface durability under repeated sliding/impact at the ejector interface. Hardness in the hardened state is chosen to resist wear at the punch point while retaining adequate toughness to avoid chipping during ejection.

• Heat treatment (typical for hardened HSS ejector punches): quench & temper to a hardened condition before coating.
• Wear resistance vs. toughness trade-off: higher hardness improves abrasion resistance, while adequate tempering helps maintain toughness against micro-chipping.
• PS4 (if selected): a steel alternative used when a different hardness/toughness balance or sourcing preference is required.

To select the correct M2 ball-lock ejector punch, match both the shank diameter (D) and the length stack to your mold’s ejector layout and the cavity/core depth. This series covers D = 6 ~ 38 mm, and overall length (L) in ranges such as 63 ~ 100 mm, 71 ~ 100 mm, and 80 ~ 100 mm depending on the configuration.

Step-by-step sizing:

• Select D (6 ~ 38 mm) to fit the guide/retention bore for the ball-lock system in your die set.
• Choose the correct point length (L1) from the available options (10 ~ 13, 10 ~ 19, 13 ~ 25, 19 ~ 30 mm) to control the contact condition.
• Verify P (1.4 ~ 12 mm) and W (1.4 ~ 14 mm) against the expected punch projection and clearance to avoid interference.
• Select the required tip shape (H, J, K, L, N, O, R, V, X, Y, Z) to match the release/contact geometry.

Tolerance and fit must follow your die design standards for the ball-lock retention and guide bores; confirm clearance around the shank diameter and ensure the chosen L achieves the target ejection stroke without bottoming.