Metric Ejector Punches with XNP Coating

This metric ejector punch line is used in injection mold and die tooling wherever parts must be ejected with repeatable force and consistent clearance. In automotive connector and housing molds, stable point engagement helps the punch transmit ejection loads without skidding, supporting uniform part release during high-cycle production.

For medical device housings and small inserts, engineers often select an ejector punch variant based on point length and overall length to match tight cavity-to-part spacing, improving control of knockout depth and reducing risk of surface marking.

In forming, trimming, and blanking dies, the selectable shank diameter and tip shape options allow tuning of contact area to match material thickness and cut geometry. The XNP coating package is suited for these demanding cycles because it is intended to improve surface durability and abrasion resistance, helping maintain ejection performance over long runs.

• Choose tip shape to match point engagement requirements
• Select point length (L1) and length (L) to control knockout depth
• Use shank diameter (D) to fit ejector layout and withstand press loads

These punches are offered in M2 and PS material options, allowing selection based on wear vs. toughness requirements. M2 is a high-speed steel widely used for wear resistance; typical heat treatment is quench and temper after hardening, producing a hard surface suitable for repetitive contact and abrasion.

PS provides an alternative balance for tooling environments where controlled toughness and machining behavior are important. Exact hardness (HRC) values are not provided in the available specifications, so hardness selection should follow your internal material acceptance criteria for M2/PS and the coating target.

• XNP coating is applied to improve surface durability and abrasion resistance in demanding cycles.
• Trade-off: higher wear resistance materials typically require careful alignment of point shape and shank diameter to avoid edge chipping under shock loads.
• After heat treatment, the coated surface is intended to support stable punch performance during long production runs.

Correct dimension matching is critical for stable ejection and to prevent misalignment in the ejector system. Start with the shank diameter D (5–32 mm) to confirm fit within the ejector bushing/hole size and to maintain concentricity with the mold cavity/core.

Next, select the point length L1 (13–19 mm, 19–25 mm, 25–30 mm) to set the effective knockout penetration. Longer L1 values increase engagement length, which can improve load distribution for deeper cavities but may be unsuitable for limited clearance.

Then choose the overall length L based on your ejector stroke and guide length requirements (available ranges include 40–80, 40–100, 50–100, and 63–100 mm).

• Match Jektole group (J2M/J3M/J4M/J6M/J9M/J12M) to your ejector layout standard.
• Select tip shape (H/J/K/L/N/O/R/V/X/Y/Z) to match required contact geometry.
• Verify dimensions P (1.3–16 mm) and W (1.6–10 mm) against part support and clearance zones.

Tolerance/fit note: use your mold-maker’s standard tolerances for hole/guides; confirm that the selected D and point profile will not bind during thermal expansion and full stroke.