M2 Steel Ball Lock Regular Punch Blanks - Heavy Duty, Inch

These M2 steel ball-lock regular punch blanks are used to build robust punch tooling for stamping and forming dies, where secure retention and consistent alignment are critical. The ball-lock interface helps the punch seat repeatably in the holder, reducing the risk of loosening during repeated press cycles.

• Automotive and industrial stamping: Suitable for forming operations that run high cycles and abrasive media, using the heavy-duty blank geometry to maintain stable punch location and wear performance.
• General-purpose forming dies: Helps standardize punch replacement across multiple tools, since the inch-dimensioned production supports predictable fit-up with existing press tooling.
• Press tooling with DAYTON/Lamina-style holders: Designed for compatibility with standardized part formats, streamlining procurement and reducing setup variation between tool builds.

The M2 variant is particularly appropriate when you need a balance of toughness and wear resistance for long service intervals under typical stamping loads.

M2 steel is an AISI high-speed steel commonly used for punch and die components that experience abrasive wear and repeated impact. Compared with A2 (air-hardening tool steel), M2 is selected when wear resistance and hot-working stability are prioritized over maximum toughness. Compared with PS4, M2 typically provides higher cutting/punching wear performance, making it a strong choice for long-running stamping tools.

• Heat treatment state: Typically supplied as a hardened tool steel blank; final quenched-and-tempered condition can be tailored by the toolmaker to the target HRC for their press loads.
• Hardness & trade-offs: Higher hardness improves wear resistance but reduces toughness; selection is usually balanced to prevent chipping under shock loads.
• Wear vs toughness: M2 generally offers excellent wear resistance for punching, with moderate toughness suitable for regular die service when properly supported in a ball-lock holder.

Toolmakers commonly fine-tune final hardness to match cavity/core geometry and press tonnage to avoid premature edge rounding or chipping.

Select this punch blank by matching its shank diameter and length to the punch holder and die requirements. The shank diameter D is specified in inches from 37 ~ 125, and the overall length is specified from 250 ~ 700. Use these ranges to filter for candidates that will seat correctly in your ball-lock holder.

• Match D (shank dia.): Choose the D value that corresponds to your holder’s bore/seat requirements to ensure secure retention and repeatable alignment.
• Match length: Verify that the selected length provides the correct protrusion and clearance inside the die set, including any stack-up from die plates and backing components.
• Fit and tolerance considerations: Because press tooling is assembled for repeatability, confirm that your system’s fit tolerance aligns with the dimensional control of the blank—tight fits reduce movement, while excessive interference can accelerate wear at the retention interface.
• Configurable vs fixed dimensions: Material (A2, PS4, or M2) is configurable per your selection; the key geometric dimensions are fixed within the specified D and length ranges.

For multi-cavity or long-run dies, standardize on the same D and length across tool sets to maintain consistent punch engagement.