DAYTON XNP Coated Ball Lock Ejector Punches - Heavy Duty, Inch

DAYTON XNP-coated ball lock ejector punches are used in injection mold tooling where positive, repeatable ejection alignment is critical. They are well suited for automotive connector and housing molds, where high cycle counts demand stable retention of the ball lock point and consistent punch travel over long production runs.

In progressive and high-volume ejection systems, the larger point design relative to the shank helps maintain alignment, reducing the risk of mispositioning during cycling. The XNP coating is intended to improve surface durability in abrasive, high-wear contact zones such as ejector plates and guide interfaces.

• Secure ball lock retention: supports reliable engagement in mold assemblies.
• Heavy-duty inch-coded geometry: helps match inch-standard tooling layouts.
• Multiple tip shapes (H–Z): allows selection to fit specific ejector configurations.

The provided specifications describe an XNP-coated heavy-duty ball lock ejector punch with variable tip geometry. While the underlying steel grade and exact heat-treatment schedule are not stated in the input data, the functional intent of the process is clear: apply a coating to increase wear resistance at sliding and contact surfaces.

For mold design considerations, the key trade-off is typical of coated ejector components: coating layers raise surface hardness and abrasion resistance, while the base material must still provide sufficient toughness to resist edge chipping under cyclic load.

• XNP coating: targets improved surface durability under long-run tooling wear conditions.
• Coating vs. base material: wear resistance is primarily driven by the coating, while toughness depends on the steel core.
• Heat treatment state: not specified; confirm base hardness and tempering requirements with your supplier when selecting for high-cavitation or high-impact ejection.

Select the ball lock ejector punch by matching both shank size and length coding to the mold cavity/core and ejector stack design. Start with the required shank diameter D in the range 37–125 (inch), then choose a length L from the coded inch options 250–450 or 275–450 to achieve the correct stroke and working height.

Next, confirm contact geometry with the P and W dimensions. Use P = 0.376–1.251 in and W = 0.062–1.083 in to align the tip/boss features with the mating retention pocket and surrounding clearance.

• Choose the Tip Shape (H, J, K, L, N, O, R, V, X, Y, Z) to fit your ejector system’s ball lock interface.
• Verify radii R within the available ranges (0.007–0.4375, 0.007–0.625, 0.007–0.75, 0.007–0.875, 0.007–1) to ensure proper clearance and reduced stress concentration.
• Maintain fit by confirming tolerances required by your mold assembly drawings (not provided in the input data).