Ball Lock Pilot Punches Tapered Tip Heavy Duty Inch

Ball-lock pilot punches are used in injection mold and die sets to create repeatable part alignment during clamp and tryout. The tapered tip on this heavy-duty inch variant helps guide the locating ball/pin into its mating feature, improving initial engagement and reducing the chance of misalignment at start-up.

• Automotive and appliance housing molds: Use the tapered pilot geometry to stabilize wafer-thin or deep-cavity halves so sprue/runner and slide interfaces start consistently over long production cycles.
• Medical device housings and small fixtures: The M2 steel base supports high hardness for stable locating under frequent mold open/close, helping maintain dimensional repeatability.
• Electronics enclosures and connector tooling: The XNM coating improves wear resistance, which is beneficial for molds that see abrasive contaminants (e.g., glass-filled compounds) or high part counts.

This combination—tapered entry for reliable start plus M2 strength and XNM wear support—makes the punch well suited for locating-critical cavity/core systems.

This pilot punch family is available in M2 and PS4 steel. M2 (an AISI M2 equivalent high-speed steel) is selected for its ability to maintain high hardness and dimensional stability under repeated cyclic contact. With proper heat treatment, it offers strong wear resistance, supporting consistent locating over extended production.

• M2: Typically quenched and tempered to achieve a balanced combination of hardness and toughness for locating and guiding applications.
• PS4 (comparison): Chosen when process compatibility or alternative performance targets are required; however, specific hardness values and exact heat-treatment parameters are dependent on the configuration supplied.

The XNM coating specified for this series further enhances surface wear resistance, improving performance in tooling environments where frictional wear or debris contact is expected. The trade-off for maximizing hardness is reduced toughness margin, so proper tempering is important for preventing edge-related chipping.

To select the correct pilot punch, match the shank diameter D and overall point/length to your mold’s mating locating feature depth and diameter. The shank diameter range for this series is D = 37 ~ 125 in (as provided by the spec), and the available standard point length & L codes include 250 ~ 600, 250 ~ 700, 275 ~ 700, and 300 ~ 700.

• Point length selection (B and C): Choose the coded range that provides enough engagement for stable lock-in without bottoming in your cavity/core.
• L dimension selection: Use the provided L ranges that align with your assembly stack-up so the tapered tip seats fully during clamp.
• Fit and tolerance: Because the pilot function depends on close alignment, confirm your mating hole/seat tolerances and any clearance requirements for the selected diameter and point geometry.

If multiple point-length ranges are offered for your configuration, treat them as configurable by part number while keeping D aligned to the locating interface. Also verify the P dimension range (0.083 ~ 0.999) when your print uses that parameter for seating/engagement.