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

Ball lock pilot punches are used to index and align upper tooling with die stations in high-cycle injection and stamping-adjacent workflows where repeatable positioning is critical. With this M2-steel, round-tip variant, the ball-lock mechanism helps preserve consistent alignment under repeated punch loading, improving start location accuracy.

In automotive connector and terminal molds (or progressive die tooling that feeds formed components), round-tip pilots support stable entry into bushings/cavity features, reducing misalignment during rapid station-to-station movement. The wear-resistant steel helps maintain locating performance over long runs.

For medical device housing and small-part forming fixtures, tight pilot control improves part-to-part repeatability at each cycle. This configuration is suited when you need reliable locating during repeated operations and when heavy-duty inch tooling interfaces demand durable pilot engagement.

• Use with press/die pilot bushings or locating systems for station indexing
• Choose the configured length range to match your upper plate-to-die depth
• M2-grade durability supports long tooling life in heavy-duty duty cycles

This pilot punch is available in M2 steel (and also PS4). M2 is a high-speed steel commonly selected for applications requiring high wear resistance under repeated impact and sliding contact at the pilot interface.

• Hardness (typical): M2 pilot components are generally supplied in a hardened condition for tool life; select the hardness target based on expected contact pressure and abrasive dust levels.
• Heat treatment: M2 is typically quenched and tempered after solution heat treatment to balance hardness and toughness.
• Wear vs. toughness trade-off: Higher hardness increases abrasive wear resistance, while excessive hardness can reduce impact toughness; choose based on punch severity and cycle rate.

PS4 is provided as an alternate material option for users evaluating different cost/performance targets while keeping the same dimensional interface requirements. Use the supplied material option that best matches your abrasion, duty cycle, and risk of chipping at the pilot tip.

To select the correct pilot punch, match your mold/press locating stack to the provided dimension ranges and code lengths. The key adjustable fit parameters are the shank diameter D and the coded point length options labeled as Standard Point Length & L, along with point length variants (B, C) and overall length L.

• Shank diameter D (in): choose within 37 ~ 125 based on the pilot bushing/hole diameter in your upper tooling.
• Length codes: standard point length & L are available in 250 ～ 600, 250 ～ 700, 275 ～ 700, and 300 ～ 700 (coded inch). Point length B/C and D follow the same coded ranges, with a narrowed option listed as D: 275 ～ 700 and 300 ～ 700.
• P dimension (in): select within 0.061 ~ 0.999 to control effective engagement/clearance at the ball-lock interface.

For tolerance and fit, ensure the chosen D and effective engagement correspond to your pilot bushing ID and depth so the ball-lock can seat consistently without bottoming or excessive clearance. Where lengths are code-based, confirm the coded range you select matches your cavity/core-to-plate spacing.