M2 Steel Ball Lock Pilot Punches - Round Tip

These M2 steel ball lock pilot punches with a round tip are used as locating elements in heavy-duty inch press tooling, where repeatable start positioning directly affects part accuracy and die life.

• Progressive die stamping: The ball lock mechanism helps maintain consistent alignment during repeated punch cycles, while the round tip pilot supports controlled entry into the guide area for stable locating.
• Blanking and piercing: Reliable pilot positioning reduces first-stroke misalignment, supporting smooth material feed and improving hole/edge quality in production runs.
• Automotive and industrial components: Tooling that experiences frequent indexing benefits from the wear-resistant construction, helping preserve positional repeatability over time.

The availability of M2 (and PS4) enables selection based on durability needs, and the specified shank diameter and length ranges allow matching to standard press and die interfaces.

Material selection for these pilot punches is based on M2 steel (and an optional PS4 variant). M2 is a high-speed steel with high hot hardness and strong wear resistance, suitable for locating parts under repeated sliding and impact conditions.

• Heat treatment: Typically supplied in a hardened and tempered condition to balance hardness with toughness for tool life in stamping environments.
• Hardness & performance trade-off: Increased hardness improves abrasion and galling resistance at the pilot interface, but excessive hardness can reduce toughness—so proper tempering is important for long-cycle durability.
• PS4 comparison: When PS4 is selected, engineers can tune the balance between wear resistance and toughness relative to M2 depending on the duty cycle and lubrication strategy.

Final wear behavior is also influenced by the pilot geometry and the required fit at the locating interface.

Select dimensions by matching the pilot’s shank diameter and length to the die/punch locating interface and the travel space available in the press.

• Shank diameter (D): Choose a model within the specified range of 37 ~ 125 in for diameter compatibility with the mating guide and ball lock components.
• Point/length selection: Standard point length and overall length are offered as coded inch ranges: 250–600, 250–700, 275–700, or 300–700 (including corresponding B/L or C/B & L variants as listed).
• P dimension: Use P = 0.061 ~ 0.999 in to align with the required engagement depth and locating geometry of the ball lock system.

For proper fit, ensure the chosen D and length keep the ball lock engagement consistent across cycles; keep clearances within the mating guide’s design assumptions to avoid binding under press load.