Ball Lock Ejector Punches - Heavy Duty, Inch, XNP Coating

These heavy-duty inch ball-lock ejector punches are used in injection mold tooling where positive ejector retention is critical, such as punch-and-die assemblies that repeatedly drive and retract ejector components. The ball-lock retention style helps prevent punch movement within the holder under cyclic loads.

• Automotive connector and housing molds: Suitable for high-cycle ejection in parts that require consistent cycle-to-cycle force transmission. The XNP-coated wear surface supports stable performance during frequent ejection cycles.
• Appliance and industrial enclosure molds: Used in robust core/cavity layouts where the ejector system must maintain alignment. The heavy-duty inch construction supports reliable load transfer to the mating die tooling.
• Thermoplastic product tooling: Ideal for designs where ejector components see sliding contact and rubbing at the punch interface. The XNP surface treatment is selected to improve wear resistance and tool longevity.

The product data provided specifies an XNP coating and ball-lock punch geometry, but it does not include the underlying steel grade or hardness (HRC). For material qualification, request the steel grade certificate and hardness report for your selected tip shape (H, J, K, L, N, O, R, V, X, Y, Z) and shank diameter within the 37–125 mm range.

In typical ejector punch practice, an XNP-type surface treatment is selected to increase wear resistance at the punch/die interface while maintaining sufficient toughness to survive repeated ejection impacts. The performance trade-off generally favors surface hardness for reduced abrasive wear, while the base steel retains impact strength to prevent chipping or cracking.

• Compare variants: Different tip shapes change contact geometry; combined with XNP, this can shift wear location and loading distribution.
• Heat treatment: Not specified in the provided parameters; confirm whether the punches are pre-hardened or quenched & tempered before coating.

Select dimensions by matching the punch shank and working interface to the ejector system and the mating punch-and-die pocket.

• Tip shape: Choose the required working end geometry from H, J, K, L, N, O, R, V, X, Y, Z based on your ball-lock retention and clearance needs.
• Shank diameter (D, in): Use a D within 37–125 to fit the holder/bore designed for that diameter.
• Length (L, coded inch): Match the tool build-up by selecting L from the available ranges, including 250–450 or 275–450 (the data also shows “250 ��� 450,” which should be verified for exact range formatting).
• P and W dimensions (in): Verify the interface/contact features using P = 0.376–1.251 and W = 0.062–1.083, plus the relevant R = 0.007–0.4375, 0.007–0.625, 0.007–0.75, 0.007–0.875, or 0.007–1 options.

Because the dataset lists dimensional ranges but not tolerances/fit, confirm the recommended clearance and tolerance class for your specific ball-lock holder. For final fit, align the chosen D, L, and the selected P/W/R geometry to the cavity/core ejector pocket dimensions and the ball-lock seat dimensions.