Inch Ball Lock Ejector Punches - Heavy Duty XNM Coated

These heavy-duty ball-lock ejector punches are used in die sets and injection mold tooling where repeatable ejection under long cycle times is critical. The ball-lock point provides controlled point contact, helping maintain consistent engagement with the part and reducing the risk of slip during stroke.

• Automotive and appliance components: In ejection stations for stamped or molded housings and brackets, the larger point versus shank helps guide the ejector during heavy-duty cycles and supports stable contact across repeated operations.
• Progressive die strip forming: When ejecting formed features from progressive tooling, the XNM coating supports wear resistance for sustained production runs, helping maintain consistent punch performance and release behavior.
• Thin-wall inserts and knock-out operations: Where controlled ejection force and positioning matter, the inch-based geometry is suited for standard tooling layouts and typical die/punch construction practices.

Select this variant when you need reliable release with improved guidance and enhanced surface durability.

This product is specified as heavy-duty ball-lock ejector punches with an XNM coating. The XNM coating is intended to improve wear resistance during high-frequency contact and friction against die steel and forming surfaces.

• Wear resistance vs. toughness: Coated tool surfaces generally improve resistance to abrasion and edge wear, but the coating performance still depends on the punch’s underlying steel strength and the loading conditions.
• Heat treatment state: The provided metadata does not list a specific steel grade or hardness (HRC). For best results, ensure the mating die set and ejector mounting surfaces are finished and conditioned for your expected contact load.

Compared to uncoated ejectors, XNM-coated punches typically offer better long-run dimensional stability of the working tip profile under production wear.

Use the provided dimension ranges to match the ejector’s shank, working dimensions, and tip geometry to your mold cavity/core or die block requirements. Start with D (shank diameter) in the range 37 ~ 125 in and confirm that the ejector bore and alignment feature in your tooling can accommodate the selected shank size with the intended fit.

• Choose the tip shape (H, J, K, L, N, O, R, V, X, Y, Z) based on the part ejection geometry and desired point engagement.
• Select length L using the coded inch range: 250 ~ 450, or 275 ~ 450 (also shown as 250 ~ 450). Verify stroke clearance and shut height so the ball-lock point reaches the required ejection position.
• Set working engagement using P, W, and R: P = 0.376 ~ 1.251 in, W = 0.062 ~ 1.083 in, and R = 0.007 ~ 0.4375 up to 0.007 ~ 1 depending on the configuration.

When specifying the ejector, ensure tolerance on punch-to-bore alignment to preserve the ball-lock point contact and prevent binding during cycling.