Ball Lock Ejector Punches - Heavy Duty, Inch

These heavy-duty ball lock ejector punches are used in injection mold and die tooling where the punch must be positively retained, resist shifting, and provide reliable ejection under repeated cycles. The ball-lock geometry helps maintain stable location inside the punch system, reducing misalignment during actuation.

• Automotive connector and bracket tooling: Select variants in M2 for durable punch blanks handling and consistent ejection of thin-to-medium features that experience frequent start/stop cycles.
• Industrial housings and appliance components: Use the inch-coded point length options (250–600 coded inch ranges) to match the required ejector travel and penetration depth for flat or stepped part geometries.
• Die and punch assemblies for punch-and-blanking: The heavy-duty inch series supports punch-and-blanking workflows where positive retention and wear resistance are critical to maintain part quality.

By choosing the appropriate tip shape (H–Z) and shank diameter range, engineers can align punch retention and working length to the mold’s cavity/core requirements.

This series is offered in selectable steels, including M2, A2, and PS4, enabling a balance between wear resistance and toughness for different duty cycles. While specific hardness values (HRC) are not provided in the input data, these common die steels are typically specified by the supplier in a hardened and tempered condition for dimensional stability and improved cutting/impact wear performance.

• M2 (high-speed steel family): Generally favored for superior wear resistance in high-cycle punching and ejection where abrasion is present.
• A2 (air-hardening tool steel family): Often selected when impact toughness and ease of processing are priorities compared with maximum wear.
• PS4: A dedicated option used for specific tooling requirements where the manufacturer’s material grade targets particular performance criteria.

Across grades, the key trade-off is wear resistance vs. toughness: harder/wear-focused choices tend to be more sensitive to excessive shock, while tougher selections better tolerate intermittent loading.

Correct sizing for ball lock ejector punches depends on matching the shank diameter and coded point length to your punch retention and working position in the mold.

• Shank diameter (D): Choose a diameter within 37–125 in based on the guide bushing and punch system design that supports stable ball-lock seating.
• Tip and point shape: Select the required tip shape (H, J, K, L, N, O, R, V, X, Y, Z) to match part geometry and clearance around the ejection window.
• Point length / working length (coded L): Use the available inch-coded ranges such as 250–500, 250–600, 275–600, or 300–600, depending on the required penetration and ejector stroke allowance.

Because only coded ranges are provided for length, select the length code that corresponds to your mold cavity/core shut height and ejection travel, and confirm fit to the punch system’s retention features. Tolerance/fit values are not specified in the input data, so rely on the mating ball-lock seat tolerances from your punch assembly drawings.