M2 Steel Ball Lock Pilot Punches - Round Tip Heavy Duty

These M2 steel ball lock pilot punches are used in injection-mold tooling and other precision forming setups where repeatable alignment is critical during high-cycle operation. The ball-lock locating feature helps maintain consistent positioning as the punch repeatedly engages and disengages, reducing drift at the start of each cycle.

• Progressive stamping / blanking tooling: Use the round tip geometry to control entry into guide bushings and to improve pilot accuracy across successive stations.
• High-repeat inch die systems: Select the heavy-duty version when you need stable fit over many actuations; the wear-resistant steel supports longer service intervals.
• Multi-cavity/stack tooling interfaces: The machined shank and standardized length options help match common press and die mounting configurations for reliable location repeatability.

With the available M2 or PS4 material variants, you can tune the balance between wear resistance and toughness for your duty cycle and alignment requirements.

M2 steel (HSS) is selected for its strong wear resistance and sustained hardness under tooling contact loads. For typical heavy-duty punch pilot use, M2 is normally supplied in a hardened condition and is commonly quenched and tempered to achieve a controlled hardness level that resists abrasive and fretting wear while retaining practical toughness for repeated impacts.

• Wear resistance vs. toughness trade-off: Higher hardness supports longer locating-life in ball-lock engagements, but excessively hard setups can reduce impact toughness if the tooling experiences shock.
• PS4 comparison: The PS4 option provides an alternative material selection for users who need different wear/toughness characteristics while still maintaining stable pilot performance.

Use the material variant that best matches your cycle rate, lubrication regime, and the severity of misalignment forces at pilot engagement.

Correct sizing starts with matching the shank diameter and the coded length to your mold or die interface. This product offers a shank diameter (D) range of 37 ~ 125 (in), so confirm the guide/pilot receiving feature is designed for the selected D.

• Match the point length: Standard point length & L coded inch are available in ranges such as 250–600, 250–700, 275–700, and 300–700. Choose the range that aligns with your required pilot penetration depth and engagement length.
• Point length coding compatibility: The B and C (point length & L) options follow the same coded ranges, and one D range is specifically listed as 275–700 and 300–700 when applicable.
• Check fit tolerance: Dimension P (0.061 ~ 0.999 in) should be verified against the mating ball-lock/locating geometry so engagement remains firm without binding.

Where possible, select a fixed catalog code for D and the closest coded length range to your cavity/core alignment requirements to minimize rework.