M2 Steel Ball Lock Pilot Punches - Round Tip Heavy Duty

These heavy-duty pilot punches are used to establish repeatable part alignment in progressive and blanking die sets, where consistent locating is critical across many stamping cycles. The ball lock mechanism helps maintain stable engagement, reducing micro-movement that can shift strip position over time.

For automotive interior and connector bracket stamping, the round tip supports controlled entry into mating bushings or pilot holes, improving start accuracy when high tonnage and fast indexing are involved. Their M2 steel wear-focused construction suits long-run tooling that cycles frequently.

They are also suitable for multi-station inch-based tooling in which standardized press/die interfaces require reliable fit repetition. Select the appropriate shank diameter and coded point length so the pilot geometry fully seats within the mating component without bottoming or excessive clearance.

• Round-tip pilot geometry for controlled starting and accurate locating
• Ball lock design to sustain alignment during repeated operations
• M2 steel variant for wear resistance in heavy-duty stamping environments

This series is offered in M2 or PS4, supporting different wear and toughness preferences for pilot tooling applications. M2 (commonly aligned with high-speed steel practice) is selected for its strong wear resistance under repeated impact and sliding at the pilot interface.

Typical performance is achieved via quench-and-temper heat treatment to balance hardness and toughness for stamping duty. After heat treatment, hardness is expected in the high-HRC range for tool life, though exact HRC values are not provided in the supplied specification and should be confirmed from your material certificate.

• M2: higher wear resistance; trade-off is that excessive hardness can reduce toughness if shock loading is severe.
• PS4: an alternative steel option for balancing durability; select based on your service conditions and required toughness/wear profile.

During manufacture, the punches are ground/machined for the round tip and locating surfaces to maintain repeatable fit in mating bushings.

To select the correct punch size, match the shank diameter D and the coded point length (B and L) to the mating pilot hole/bushing in your die set. The shank diameter range is D = 37 ~ 125 in (as provided), so choose the smallest size that maintains correct engagement without forcing assembly.

Point length is offered in coded inch options: 250 ～ 600, 250 ～ 700, 275 ～ 700, and 300 ～ 700. For certain configurations, the available ranges further restrict to 275 ～ 700 or 300 ～ 700 for the D / B&L coding.

• Verify cavity/core stack height and required pilot engagement depth to avoid bottoming.
• Use the listed P dimension range (P = 0.061 ~ 0.999) to align locating/clearance intent with your mating geometry.
• Plan for fit control: ball-lock pilots depend on stable engagement, so confirm your die-side tolerance class and press/die interface repeatability.

Where multiple lengths are coded, treat length as the configurable dimension and keep D aligned to your standardized die interface.