M2 Steel Point Larger than Shank Ball Lock Punches

Ball-lock punch components like this one are commonly used in die sets for stamping and progressive forming, where the point engages the part and the ball-lock system must retain the punch reliably under repeated load. The “larger point than shank” geometry improves guidance and stability, helping reduce misalignment during high-cycle ejection.

• Automotive and appliance progressive dies: Suitable for heavy-duty die work because the M2 steel point and wear-focused XNM coating maintain consistent sliding and impact behavior.
• Die work with positive ball-lock retention: The larger point supports secure seating and dependable retention in ball-lock ejector punch systems.
• Metric tooling: Offered in shank diameter steps (D = 13, 16, 20, 25, 32 mm) and fixed overall lengths (L = 80–100 mm) to match common die-building standards.

This punch point is made from M2 high-speed steel, selected for strong hot hardness and wear performance typical of tooling that sees both friction and repeated impact. In industry equivalence terms, M2 is commonly aligned with AISI M2 (high-speed steel class) and is widely used when higher hardness and edge stability are required.

• XNM coating: Improves wear resistance and reduces friction at the sliding/engagement surfaces, extending service life in production.
• Hardness & trade-offs: While exact HRC is not specified in the provided data, M2 tooling is typically heat-treated for high hardness; designers should expect good wear resistance at the cost of reduced toughness compared with lower-alloy steels.
• Heat treatment state: The data does not provide a specific tempering or nitriding condition; confirm the receiving hardness if you need a defined HRC window for qualification.

Compared with softer die steels, M2 with an appropriate coating generally offers better wear life for ejector/punch points under high-cycle conditions.

Select the punch by matching both the shank diameter (D) and the point/shank proportions required by your ball-lock ejector punch system. Available shank diameters are D = 13, 16, 20, 25, 32 mm, and the corresponding P dimension ranges are provided for each size family (e.g., 13.1–32, 16.1–38, 20.1–40, 25.1–44, 32.1–50 mm).

• Check point length: Use the fixed L1 (point length) = 19–30 mm to ensure proper engagement depth in the die cavity/core.
• Verify overall length: Choose L = 80–100 mm to achieve correct stack height and ejection stroke clearance.
• Tip shape selection: Pick the required tip profile from H, J, K, L, N, O, R, V, X, Y, Z to match the part geometry.
• Fit/tolerance: Use the system’s ball-lock interface requirements; this dataset provides size ranges for W (1.57–27.8 mm) and R (0.2–16 / 0.2–19 / 0.2–20 / 0.2–22 / 0.2–25 mm), which should be validated against your punch retention and clearance targets.