DIN Standard Ball Lock Ejector Punches Heavy Duty CRN Coating

DIN-standard ball lock ejector punches with heavy-duty geometry are used in injection molding tooling where reliable ejection and long maintenance intervals are critical. The ball lock retention helps prevent punch drift in the guide during repeated cycles, supporting stable part release.

In automotive connector and sensor housing molds, these punches maintain consistent contact as the cavity surfaces cycle between forming and ejection. The metric punch body and point alignment reduce sensitivity to minor die wear, helping keep ejection forces predictable at higher production rates.

They are also suited for electrical component housings and thick-rib parts, where ejection can be uneven across the parting line. The CRN coating’s wear control supports sustained performance when abrasive residues or glass-filled materials increase tooling abrasion.

• Use the ball lock design when punch retention stability is required
• Choose CRN-coated heavy-duty punches for extended service life under abrasive ejection conditions
• Select the point length to match part thickness and protrusion needs

The provided configuration specifies a CRN-coated ball lock ejector punch for wear-controlled ejection. CRN (often applied as a chromium-based nitride) is typically selected to improve surface hardness and reduce adhesive/abrasive wear at the punch tip and contact areas.

Heat treatment and final hardness are not explicitly listed in the supplied data; therefore, performance is best evaluated using the coating’s intent: sustained wear resistance through repeated mold cycling. The heavy-duty geometry supports toughness by reinforcing load transfer through the shank, helping limit bending and localized deformation.

• Wear resistance: enhanced at the working surfaces due to CRN coating
• Toughness trade-off: coatings improve abrasion resistance but require sound punch rigidity to manage impact load and edge chipping risk
• Manufacturing process: punch material is machined to DIN form and then finished with CRN coating for stable ejection durability

If you need a specific base steel grade and HRC target, provide the steel/material option for this series so we can map coating performance to the substrate hardness.

Select dimensions by matching the punch working profile to the mold’s core/cavity ejection requirements. This series uses fixed L1 (point length) of 19 to 30 mm and fixed L (overall length) of 80 to 100 mm, so your primary selection will focus on shank diameter (D), the point shape, and the contact geometry.

• Choose shank diameter D (mm): 13, 16, 20, 25, 32, or 40 based on the mating holder bore and guide compatibility.
• Match point length L1: set 19–30 mm to cover the required engagement depth into the part feature or clearance zone.
• Verify point shape: select among H, J, K, L, N, O, R, V, X, Y, Z to match the part’s ejection footprint and edge clearance.
• Check engagement geometry: confirm P (13.1–56 mm, varies by D range), W (1.57–34.73 mm), and R (0.2–28 mm) align with the tooling contact area and allowable stress concentration.

Because tolerances for these dimensions are not provided in the input, ensure your mold drawings specify the matching holder fit for the selected D and point profile, and leave appropriate clearance for coating thickness and assembly variation.