Inch M2 Steel Ball Lock Pilot Punches - Round Tip, Heavy Dut

These ball lock pilot punches are used in injection mold tooling and press die interfaces where repeatable alignment is critical during high-cycle operations. The ball-lock feature helps maintain stable indexing between plate sets, reducing pilot wear impacts on positioning accuracy.

• Progressive die / multi-cavity assembly: round-tip geometry supports controlled initial contact and accurate locating, helping maintain consistent cavity alignment across repeated strokes.
• Automotive and heavy-duty housings: the heavy-duty inch configuration and wear-resistant steel construction are suited for long production runs where misalignment can cause dimensional drift.
• Medical or precision component tooling: consistent pilot engagement improves repeatability when forming features that require tight stack-up control between upper and lower tooling.

The variant specified here uses M2 steel, which is designed to balance hardness and wear resistance for reliable positioning in duty cycles typical of pilot-location systems.

For this series, the listed materials include M2 (and an alternate PS4 option). M2 is a high-speed steel typically corresponding to the AISI M2 family, selected for high hardness and wear resistance under repetitive impact and sliding during pilot engagement.

• Heat treatment (typical for M2 pilot punches): quenched and tempered after machining to achieve a hard, wear-focused microstructure suitable for locating pins.
• Hardness / performance trade-off: higher hardness improves resistance to ball/pilot surface wear, while toughness is managed through tempering to limit chipping risk under misalignment or heavy loads.

PS4 may be selected when a different balance of machinability or durability is desired; compared to M2, material choice typically focuses on achieving the required wear life for the expected duty cycle while maintaining adequate resistance to impact.

Note: exact HRC values are not provided in the available specifications.

To select the correct pilot punch size, match your required shank diameter (D) and length range to the mold press interface. This series lists D (shank dia.) = 37 ~ 125 (in), so choose the smallest D that meets your locating and strength requirements for the plate set and load conditions.

• Point length / overall length options: point length & L are available in coded inch ranges such as 250 ~ 600, 250 ~ 700, 275 ~ 700, and 300 ~ 700, with additional combinations noted for B & L and C & L.
• P dimension: the P = 0.061 ~ 0.999 selection should align with the ball-lock engagement geometry needed for stable indexing and repeatability.

Because these are locating components, keep dimensional fit consistent across the cavity/core interface; if your press system has defined pilot clearances, select the corresponding coded length and D to maintain proper engagement depth. Where your application uses standard inch tooling stacks, use the coded inch length bracket that best fits your plate thickness and engagement travel.