M2 Steel Ball Lock Pilot Punches - Round Tip Heavy Duty XNAP

Ball-lock pilot punches with a round tip are used to ensure repeatable die alignment in high-cycle press tooling, especially where metric die components must locate consistently from setup to setup. In automotive connector and bracket stamping, the pilot geometry stabilizes die movement during the early press strokes, helping maintain positional accuracy as parts advance across the carrier.

• Metric stamping die alignment: The ball-lock guidance improves initial die insertion stability, reducing misalignment risk during die changeovers.
• Progressive press tooling: The heavy-duty construction supports reliable pilot behavior through repeated press cycles when lubrication and wear management matter.
• Precision die pilot applications: The round tip helps maintain smooth seating and consistent pilot fit, supporting stable die closure and consistent part quality.

The M2 steel variant, paired with the XNAP coating, is suited for these scenarios because it balances wear resistance with impact toughness typical of pilot components that see frequent contact and friction under load.

This product is offered in M2 steel (also listed as PS4 as an available material variant). M2 is an AISI M2 equivalent high-speed steel grade commonly selected for wear-prone cutting and guiding elements where hardness and abrasion resistance are needed.

• Hardness / performance: Expect high hardness after proper heat treatment, improving wear resistance at the ball-lock contact surfaces.
• Heat treatment state: Typically supplied as a quenched & tempered hardened condition for dimensional stability and toughness control in tooling components.
• Wear vs. toughness trade-off: Higher hardness improves sliding/impact wear life, while tempered structure helps avoid excessive brittleness under repeated press loading.

If you select the PS4 option, confirm its heat-treated hardness and coating compatibility for your specific load and lubrication conditions, since wear resistance and toughness balance can differ from M2.

Select the pilot punch by matching the shank diameter (D), point length (L1), and overall length (L) to the corresponding die block and pilot bushing/cavity geometry. The available shank diameter range is D = 10 ~ 40 mm, so choose the size that matches your die pilot hole/bushing to maintain proper ball-lock engagement.

• Choose D: Pick D within 10–40 mm to align with the mating pilot feature diameter.
• Choose L1 (point length): Available L1 options are 12–21, 15–27, and 21–32 mm. Select L1 based on the required insertion depth for stable guidance.
• Choose L (overall length): Available lengths include 65–112, 65–127, 73–127, 92–127, and 112–127 mm. Ensure L clears the stack-up and supports full seating during die closure.

Also verify the P dimension = 1.45 ~ 29.95 mm, which affects locating geometry and ball-lock positioning. Use controlled tolerances for pilot fit to prevent backlash (too loose) or assembly interference (too tight), particularly under repeated press cycles.