Ball Lock Ejector Punches Heavy Duty Metric

Ball-lock ejector punches are used in injection mold tooling where the ejector must remain positively located during high-cycle ejection. The ball-lock geometry is especially suited for robust ejection systems in tool & die builds that experience repeated impact loads.

• Automotive connector or sensor housing molds: Choose the heavy-duty variant when frequent ejector actuation can otherwise loosen or shift punch components. The metric construction and stable lock-in retention help maintain consistent discharge positioning.
• Appliance and electronics enclosures: For parts with deeper draw features, longer punch runs help transmit ejection force without losing alignment. Point-length options (L1 ranges) support accurate forming and knockout.
• General precision progressive/insert tooling: Tip shape variants (H, J, K, L, N, O, R, V, X, Y, Z) allow matching the punch contact geometry to the cavity surface finish and discharge behavior.

This heavy-duty metric series is available in M2 steel or PS4 depending on the wear and toughness requirements of the ejector interface.

• M2 steel: Typically selected for improved hot hardness and wear resistance under repeated sliding/impact conditions. Expect a harder, wear-focused behavior with a trade-off in toughness versus more ductile steels.
• PS4: Chosen when balanced wear resistance and resistance to edge chipping are needed for punch tips. Compared to M2, it is often used for better impact tolerance depending on the required service conditions.

As with standard ejector punch manufacturing, components are produced to the specified shank diameters and lengths, then finished to maintain alignment of the ball-lock retention features. Final hardness level and heat-treatment state should be confirmed with the selected material option and your operating temperature window, since material-specific tempering and surface finishing determine the practical wear/toughness balance.

Select the correct ejector punch size by matching both the shank diameter (D) and the overall length (L) to your ejector plate stack-up and guide system.

• Shank diameter: Use D = 10 ~ 40 mm to match your die insert or guide bore size. Verify fit in the related tooling bore to avoid binding or excessive clearance.
• Point length: Select L1 from the provided options (10 ~ 19, 13 ~ 25, or 19 ~ 30 mm) to control the contact/striking depth against the molded part or core feature.
• Overall length: Choose L from the available ranges (63 ~ 100, 63 ~ 125, 71 ~ 125, or 80 ~ 125 mm) to ensure full stroke coverage without bottoming.
• Tip shape: Pair the required forming/discharge contact geometry (H, J, K, L, N, O, R, V, X, Y, Z) with your cavity/core surface profile.

Because the product is metric and includes ball-lock retention, confirm that your ejector system accommodates the selected Jektole group (J4M, J6M, J9M, J12M) and the P/W dimensional ranges for proper lock-in seating.