CRN Coating Ball Lock Ejector Punches Heavy Duty, Inch

Ball-lock ejector punches like this are used in injection molding die sets where ejector reliability must be maintained under repetitive cycling and high contact loads. They are especially common in automotive connector and sensor housing molds, where precise retention of the ejector punch during ejection helps prevent misalignment and premature wear at the punch/ball interface.

• Automotive electrical component inserts: the point-larger-than-shank ball-lock geometry supports stable retention, reducing the risk of punch drift during short-cycle production.
• Consumer electronics enclosure tooling: the heavy-duty construction supports consistent ejection force transfer while the CRN coating improves surface durability in wear-prone motion.
• General punch and die assemblies: selectable tip shapes (H, J, K, L, N, O, R, V, X, Y, Z) help match mating cavity/core features for repeatable fit.

Choose this CRN-coated inch series variant when you need strong ball-lock positioning plus enhanced wear resistance for extended mold service life.

The provided specifications describe a CRN-coated heavy-duty ball-lock ejector punch system. While the exact base steel grade and heat-treatment state are not listed in the input data, CRN coatings are typically selected to raise surface hardness and improve resistance to abrasive wear and sliding contact.

• Heat treatment: not specified in the provided parameters (coating is the defined performance feature).
• Wear resistance: the CRN coating is included to extend tooling life under demanding cycles where tip and shank contact surfaces experience repeated friction and impact.
• Toughness trade-off: coatings generally prioritize wear resistance; therefore, baseline toughness is determined by the underlying punch steel, which is not provided here.

If your application trades off maximum wear life versus impact robustness, confirm the underlying punch material/condition with your procurement engineer so hardness and toughness targets align with your press/injection parameters.

Select the correct punch by matching the shank diameter (D), length code (L), and the tip geometry to the receiving bore and ejection system of your mold core/cavity. This inch series provides variable tip shapes: H, J, K, L, N, O, R, V, X, Y, Z.

• D (Shank dia.): choose within 37 ~ 125 in as specified for the ejector interface.
• L (Length): use coded inch ranges 250 ～ 450 or 275 ～ 450 depending on required stack height and stroke clearance.
• Tip-related dimensions: match P (0.376 ~ 1.251 in) and W (0.062 ~ 1.083 in) to the mating slot/ball-lock seat geometry.
• R (Radius): verify against one of the available ranges 0.007 ~ 0.4375, 0.007 ~ 0.625, 0.007 ~ 0.75, 0.007 ~ 0.875, or 0.007 ~ 1.

For fit, ensure the ball-lock seat and receiving bore are designed for the chosen tip shape and shank diameter; tolerances are not provided, so confirm drawing-level fit requirements with your die builder.