M2 Steel Ball Lock Pilot Punches - Round Tip, Heavy Duty, Me

These M2 steel ball-lock pilot punches are used in injection-mold-related metalworking workflows where precise transfer and repeatable part positioning are critical, such as progressive blanking and stamping assemblies that must index reliably from station to station.

In automotive connector and terminal fabrication, round-tip pilots guide the die set during shut height alignment and help maintain consistent locating under frequent cycling. The ball-lock mechanism supports stable engagement so the press can reestablish the same start position after each cycle.

For medical device housings and other high-compliance components produced from multiple stamped features, this variant is suited when controlled starting geometry and durable pilot wear performance are needed to keep tolerances tight over long production runs.

• Progressive die indexing: supports accurate starting and consistent station-to-station placement.
• Heavy-duty press alignment: ball-lock helps maintain repeatable positioning during repeated punching.
• Round tip locating: helps center and stabilize entry into bushings or matching die interfaces.

The series is offered in M2 and PS4 steels, selected for wear-focused pilot performance. M2 (high-speed steel) is typically used where hardness and edge retention are required; it offers strong wear resistance with comparatively lower toughness than tougher steels, making it well-suited for repetitive locating where deflection must remain minimal.

For tooling life, M2 is commonly supplied and processed in a hardened condition, then quenched and tempered to balance hardness and toughness. Depending on the supplier processing, hardness targets are often in the high-HRC range for pilot components to resist sliding wear at the ball-lock interface.

PS4 is an alternative material choice when a different toughness-to-wear balance is preferred. Compared with M2, it may be selected to tune durability under different load/impact conditions while maintaining reliable locating performance.

• Wear resistance: optimized via M2 hardened heat treatment.
• Toughness trade-off: high hardness improves wear, but reduces tolerance to severe impact.
• Manufacturing: typically machined to fit, then heat treated to the final hardened state for dimensional stability.

Select the pilot punch based on the required shank diameter (D) and the coded point length options available for your die set. This series supports D = 37 ~ 125 in and point-length codes covering multiple ranges: 250~600, 250~700, 275~700, and 300~700 (with additional availability depending on the variant).

Match the round tip point length to the cavity/core or guide interface engagement depth needed for reliable ball-lock seating. In practice, ensure the pilot fully enters the mating bushing/lock region before the die lands on critical features, preventing partial engagement that can cause indexing drift.

• Step 1: choose D to match the pilot bore or guide contact diameter in the tool.
• Step 2: select the coded length (e.g., L 250~600 / L 250~700 / L 275~700 / L 300~700) based on required engagement length.
• Step 3: confirm dimensional fit for ball-lock interfaces using your tool’s tolerance stack; the P dimension range (0.061 ~ 0.999 in) should be checked against the mating geometry requirements.