Ball Lock Ejector Punch Blanks - Heavy Duty, Inch

Used in punch tooling and mold build-ups that rely on repeatable, controlled ejection, these blanks help engineers assemble ball-lock ejector punch systems that hold position under high cycling. The heavy-duty ball-lock interface supports secure retention, making the assembly well-suited for progressive die and automotive connector mold tooling where frequent part removal can create side loads and alignment drift.

They are also appropriate for appliance and industrial housing molds, especially when a modular ejector setup is needed for maintenance and future cavity changes. Inch sizing aligns with common North American mold and die practices, reducing conversion issues during procurement and engineering changeouts.

Because the shank sizes and coded length ranges cover a wide build-up envelope, this variant is suited when you need consistent punch alignment and stable locking performance across multiple cavity or punch stations.

• Ball-lock retention supports stable positioning during demanding cycles
• Selectable tool steels provide wear-focused performance for ejector wear surfaces
• Inch-based dimensions support standard North American tool builds

This line offers selectable tool steel options—A2, M2, and PS4—so you can tune wear resistance and toughness to your press or injection environment. All variants are intended for ejector punch tooling where surface wear and locking-area integrity are critical.

• A2: an air-hardening tool steel commonly selected for a balance of toughness and wear resistance. Typically supplied in pre-machining-ready form and heat treated to a functional hardness, often around the high-40s to low-50s HRC range depending on the final temper.
• M2: high-speed steel (commonly associated with AISI M2) offering superior wear resistance for longer life under repeated sliding and high thermal load; it generally trades off toughness versus more conventional tool steels.
• PS4: selected where a tailored wear-performance profile is desired for tooling applications; final hardness and microstructure depend on the supplier’s heat treatment cycle.

Heat treatment is typically performed via quench-and-temper or equivalent tool-steel processing to achieve the required hardness and dimensional stability before final fitting.

Selection starts with the shank diameter D and the overall length L (coded inch) you need for your cavity/core stack and ejector stroke design. Available shank diameter range is 37 ~ 125 in, so choose the closest diameter that matches your guide, bushing, or ejector retention pocket geometry.

Next, pick the coded length range that fits your tool build-up envelope:

• L options (coded inch): 250 ~ 500, 250 ~ 600, 275 ~ 600, and 300 ~ 600

To match the mold cavity/core requirements, ensure the ejector alignment path provides proper clearance for the ball-lock interface and that the punch length covers the required protrusion and retraction without bottoming in the return stroke.

Tolerance & fit: ball-lock assemblies depend on repeatable seating. Maintain matching diameter and length relationships between the punch and its corresponding locking pocket so the locking action remains consistent across assembly and service cycles.