Inch Ball Lock Ejector Punches - Heavy Duty

These heavy-duty inch ball-lock ejector punches are used in injection mold and die tooling where reliable punch retention and repeatable ejection/punching force are critical. The ball-lock engagement helps prevent movement inside the punch holder, supporting stable cycles even when the tool sees abrasive material loads.

• Automotive and appliance die work: suited for thick-part punching or ejection points that require consistent positional accuracy across long production runs.
• Electronics housings and interconnect features: use the appropriate tip shape variant (H through Z) to match feature geometry while maintaining secure ball-lock retention.
• Stamping and metal-insert operations: the XNM coating is designed to reduce wear at the contact zone, helping maintain performance when abrasive surfaces accelerate tooling wear.

Because this variant is built for heavy-duty die applications and includes an XNM coating, it’s well matched to tooling that demands dependable retention plus improved wear resistance at the working tip.

The provided specification confirms an XNM coating on these inch ball-lock ejector punches. XNM is used to improve wear resistance at the working interface, helping limit abrasion-driven loss of clearance and feature definition over repeated cycles.

• Wear resistance vs. toughness trade-off: hard, wear-focused surface coatings generally improve sliding/impact endurance but should be matched to your load and tip geometry to avoid premature edge chipping.
• Heat treatment: the input data does not specify a base steel grade (e.g., H13/D2/SKD/SKH equivalents) or an exact heat-treatment state (quenched & tempered, nitrided, etc.), so heat-treatment hardness in HRC cannot be stated from the provided information.
• Manufacturing process: these parts are produced as precision ball-lock punch components with an applied coating to the working regions for improved contact performance.

If you need hardness (HRC) or a specific steel/heat-treatment route for your application, share target loads and your preferred base material standard so we can confirm compatibility.

Selection starts with matching the shank diameter (D) and overall length (L) to your holder and stack-up. This series covers D = 37 ~ 125 in and L in coded inch ranges of 250–450 and 275–450, so confirm the required protrusion and clearance in the mold/die before finalizing.

• Tip geometry: choose the required Tip Shape (H, J, K, L, N, O, R, V, X, Y, Z) based on the punching/ejection feature profile.
• Cross-sectional/contact sizing: verify P = 0.376 ~ 1.251 in, W = 0.062 ~ 1.083 in, and R = 0.007 ~ 1 against the cavity/core interface to avoid under/over-travel.
• Fit and tolerance: because ball-lock retention depends on mating geometry, maintain consistent dimensional match between punch shank and the corresponding ball-lock holder; the input data does not provide explicit tolerance values, so rely on your holder’s specification for clearance.

After dimension match, validate travel limits and expected wear at the tip—especially when using the XNM-coated variant for abrasive environments.