Ball Lock Ejector Punch Blanks - Heavy Duty, Inch, X Shape

These heavy-duty inch ball lock ejector punch blanks are used to build stable ejector systems in injection and die tooling where alignment under cyclic load is critical. The X-shaped tip geometry supports repeatable contact during ejection, helping maintain consistent punch-to-slot alignment over long production runs.

In automotive connector and housing molds, they help achieve controlled ejection of medium-to-large parts, reducing the risk of uneven lift that can contribute to flash or surface defects. The shank size range (D) supports integration across a wide tooling envelope while the larger-than-shank point design supports reliable ejection under load.

In appliance and industrial enclosure molds, the blank-to-specified tip approach makes it suitable for maintenance rebuilds and die block upgrades. Its inch dimensions and configurable tip shape selection (including X) allow engineers to match existing tooling geometry without redesigning the entire ejector train.

Specific steel grade, hardness (HRC), and heat-treatment condition are not provided in the supplied specifications for this ball lock ejector punch blank series. Because the product is described as heavy duty and intended for press and die work, engineers should confirm the supplied material datasheet for the exact alloy, allowable operating temperature, and finish requirements.

When selecting a material for ejector punches, the key trade-off is typically:

• Higher hardness improves wear resistance at the tip and sliding interfaces but can reduce toughness under shock loading.
• Tougher tempered conditions improve resistance to chipping/breakage during ejection events but may wear faster under abrasive debris.

If your application includes high-cycle ejection with dust or glass/mineral-filled polymers, request the recommended heat treatment and any surface treatments (e.g., nitriding) that match your wear and impact requirements.

Select the ejector punch blank dimensions by matching the ejector train envelope and ensuring the ball-lock interface aligns with the mating tooling features. The key variable for capacity and fit is the shank diameter D, provided as 37 ~ 125 in (inches).

Next, choose the overall length L based on your cavity/core stack height and ejector stroke requirements. Available length code ranges are 250 ~ 450 and 275 ~ 450 (coded inch), so verify which coding format your drawing uses.

• Use P (0.376 ~ 1.251 in) and W (0.062 ~ 1.083 in) to match critical cross-section geometry to your punch guide or retention pocket.
• Select Tip Shape = X to align with your contact footprint needs; other available tip shapes are H, J, K, L, N, O, R, V, Y, Z.

Confirm tolerance stack-up at the ball-lock interface with your mating component; even when nominal dimensions match, fit depends on the supplied tolerance for D, P, and W in your tooling standard.