Ball Lock Ejector Punches Heavy Duty Inch

These heavy-duty ball-lock ejector punches are used in punch tooling where ejector retention and repeatability directly affect part integrity. The ball-lock engagement provided by the point larger than shank geometry helps maintain secure coupling under high cycle loading, reducing risks of misalignment or incomplete ejection.

• Progressive and transfer dies: Ideal for station-to-station ejection of formed components, especially when the punch mechanism experiences frequent load reversals. Use the heavy-duty variant to keep the ball-lock system stable over long runs.
• Automotive-grade metal stamping: Suitable for die builds that require consistent ejection timing in tough materials, where wear at the ejector interface can degrade performance. Select an M2 or A2 steel blank to balance wear resistance with toughness for durable retention.
• High-precision inch-coded tooling: The inch-coded dimensions (e.g., D shank diameter ranges and coded lengths) match common tooling conventions, simplifying integration into existing die assemblies.

This series is offered in M2 or A2 steel blanks, selected to improve wear resistance at the ejector interface while supporting stable ball-lock retention. M2 is typically used for higher hot hardness and abrasion resistance, making it well-suited for aggressive cycling where wear and edge degradation are primary concerns. A2 is commonly chosen for a more balanced toughness-to-wear performance when shock loading and adhesion-type wear are expected.

Heat treatment is generally performed to achieve functional hardness for punch tooling (commonly hardened and tempered to the target HRC range for durable wear resistance while retaining sufficient toughness). After machining, critical surfaces are finished to maintain the ball-lock fit and consistent ejection behavior.

• Hardness trade-off: Higher hardness improves wear resistance but can reduce toughness under impact; lower hardness improves toughness but may accelerate wear.
• Wear vs. toughness: Choose M2 for harder, more wear-focused performance; choose A2 when toughness and balanced service life are prioritized.

Select dimensions based on your die block layout and the ejector engagement geometry required for ball-lock operation. Start with the shank diameter (D) in the range 37 ~ 125 in and confirm it matches the corresponding guide/bushing and retention interface in your punch tooling.

• Length (L): Use coded inch ranges such as 250 ～ 450 (or 275 ～ 450) to achieve proper travel and stack height in the die. Ensure full stroke is available without bottoming or interference.
• Head/ball-lock dimensions: Match P (0.376 ~ 1.251 in), W (0.062 ~ 1.083 in), and R (0.007 ～ 0.4375 up to 0.007 ～ 1 in, depending on variant) to the mating ball-lock receiver features so the point larger than shank engages reliably.

Because tip shape is selectable (H, J, K, L, N, O, R, V, X, Y, Z) and multiple “Jektole group” options exist (J4, J6, J9, J12), confirm your tooling’s mating pocket profile before finalizing dimensions. If your assembly uses tight fits, validate the finished tolerances of both ejector and receiver to preserve retention and ejection repeatability.