M2 Steel Ball Lock Regular Ejector Punches

Ball-lock regular ejector punches are used in injection mold and progressive die tooling where consistent ejection force and repeatable alignment are critical. In automotive connector and housing molds, ball-lock seating helps maintain stable contact in the ejector assembly, reducing the risk of punch tip drift over long production cycles.

For consumer electronics and appliance enclosures, these punches support reliable part release while handling frequent start-stop maintenance intervals. The M2 steel variant is suited to these environments because it provides strong wear resistance at the punch tip, where sliding and contact stresses are highest.

In die maintenance and tooling rebuilds, the metric shank diameter range (D 10–40 mm) and multiple point lengths enable engineers to match existing ejector plates with minimal redesign.

• Automotive connector molds: stable seating for repeatable ejection
• Electronics/appliance housings: wear-focused punch tips for long cycles
• Die maintenance builds: metric compatibility via D and L ranges

This series is offered in M2 steel (high-speed tool steel) and PS4 (alternative wear-oriented steel option, depending on your selection). M2 is selected when punch tips experience repeated contact and abrasion during ejection, helping maintain edge and surface integrity over time.

• M2 steel: typically heat treated as quenched & tempered to balance hardness and toughness for punch service
• Wear vs. toughness trade-off: higher hardness improves wear resistance, but excessive hardness without adequate toughness can increase chipping risk under shock loading

The manufacturing process generally includes precision machining of the shank and point geometry, followed by heat treatment to achieve the target hardness for punch durability. Because this is a ball-lock ejector style, dimensional stability after heat treatment is important for consistent seating in the ejector assembly.

To select the correct ball-lock regular ejector punch size, start by matching the shank diameter D to your ejector guide or receiving bore. Available D (mm) range is 10–40, so choose the closest fit to the original tooling interface.

Next, match the overall L (length, mm) to the stroke and stack-up of your mold. The series provides L options of 63–125, 71–125, and 80–125, depending on the point length family you select.

• Point length L1 (mm): choose from 10–19, 13–25, or 19–30 to control engagement depth
• Tip/pin profile: select the requested Tip Shape (H, J, K, L, N, O, R, V, X, Y, Z) for the contact pattern required by the part geometry
• Geometry features: use P (1.5–12 mm) and W (1.5–14 mm) to align with mating surfaces

Tolerance is governed by your ejector plate and guide design; verify clearances in the receiving bore to prevent binding during thermal expansion, especially for repeated high-cycle operation.