JIS Standard M2 Steel Ball Lock Ejector Punches

These ball-lock ejector punches are used to drive reliable part ejection in precision sheet metal and progressive die tooling where consistent alignment under repeated load is critical.

• Automotive connector and bracket blanking: use the ball-lock retention feature to maintain stable punch alignment, reducing the risk of sticking or uneven ejection as cycle rates increase.
• Industrial electrical enclosure punching: the heavy-duty M2 steel body supports punching operations across multiple die stations, while the XNAP coating helps resist abrasive wear at the tip during frequent contacts.
• High-mix production progressive dies: select the appropriate tip shape (H/J/K/L/N/O/R/V/X/Y/Z) to match contact geometry for controlled ejection of thin sections and formed features.

The M2 steel variant with XNAP coating is suited for aggressive wear environments because it maintains hardness at the working surfaces while supporting stable ejection performance over time.

This series is offered in M2 steel (also selectable with PS4 as an alternative). JIS Standard M2 corresponds to the commonly used AISI M2 (high-speed steel) family, chosen for cutting/punching tools requiring high wear resistance.

• M2 + XNAP coating: the coating is intended to increase surface wear resistance while helping preserve stable ejection contact over repeated cycles.
• Hardness & performance trade-off: high-speed steels like M2 are typically hardened to achieve high hardness for abrasion resistance, balancing hardness versus toughness to resist chipping at the tip.

Where wear is dominant and the punch experiences frequent tip contact, M2 with XNAP is the preferred configuration. If your application prioritizes a different balance of wear and durability, PS4 can be considered as the alternate material option in the same ball-lock punching family.

Select the punch dimensions by matching the ejector/punching requirements in your tool cavity or stripper plate arrangement. This series supports D (shank diameter) from 10 to 40 mm, so choose the largest shank that fits your tool guide and available space while maintaining stable guidance.

• Point length L1: choose from 10–19 mm, 13–25 mm, or 19–30 mm depending on how deep the punch must reach for effective ejection.
• Total length L: available ranges include 63–100, 63–125, 71–125, and 80–125 mm. Pick the length that provides the required working stroke and retraction clearance.
• Point dimensions: P = 1.5–12 mm and W = 1.5–14 mm help define the tip contact area; select based on the part geometry and ejection force path.

Choose the J4M/J6M/J9M/J12M ejector group to match your die’s mechanical interface and retention design. Tip shape (H/J/K/L/N/O/R/V/X/Y/Z) should be selected to control contact and ejection control for the specific sheet/formed feature.