Ball Lock Ejector Punch Blanks - Economy

These ball-lock ejector punch blanks are designed for die sets and ejector stations where the workpiece must be held securely during punching and blanking. The built-in ball-lock retention helps stabilize the punch-to-component relationship, reducing movement that can degrade hole or edge consistency.

• Automotive and general industrial blanking: Use the 10–32 mm shank diameter sizes to match common die layouts for repeatable ejection/blanking in high-cycle production lines. The economy variant is suited when consistent performance is required without over-specifying premium tool steels.
• Small-to-medium connector and bracket dies: The regular shoulder type supports reliable transfer between cavity/core tooling and the ejector system, improving alignment stability during operation.
• Assembly parts requiring controlled ejection: Ball-lock retention aids in consistent component release, which helps reduce scrap caused by misalignment during successive strokes.

Pick the specific steel option (SKH51 or SKD11 equivalent) based on the wear/toughness balance needed for your expected cycle counts.

This series is offered in two common die-punch steel options: SKH51 Equivalent (AISI M2) and SKD11 Equivalent (AISI D2). M2 (SKH51) is a high-speed steel grade known for strong wear resistance with better toughness in many punching applications, while D2 (SKD11) is a high-carbon, high-chromium tool steel that is typically selected for excellent abrasive wear resistance.

• SKH51 / M2 equivalent: Generally chosen when both wear performance and resistance to chipping are priorities.
• SKD11 / D2 equivalent: Generally chosen when cutting/punching surfaces face heavy abrasive wear demands.

In standard tooling practice for these grades, parts are typically supplied after heat treatment appropriate for die service (commonly quenched and tempered for toughness balance). Final hardness and the exact heat-treatment state should be confirmed for your build, since punching performance depends on achieving the target hardness and microstructure for the selected steel.

Selection is driven primarily by matching the D (shank diameter) and the overall length dimensions to your die holder and alignment requirements. Available shank diameters are 10, 13, 16, 20, 25, 32 mm.

• Choose D to match the ejector guide bore or receiving pocket diameter in the die set, ensuring the punch can slide/alight without binding.
• Select L (L dimension) from the provided ranges: 71–100 mm or 63–90 mm, depending on the stroke stack-up and die thickness.
• Select LC (full length alteration) from 60–100 mm or 50–90 mm to match the required effective working length in your assembly.

For fit and alignment, account for the clearance between shank and guide components and any shoulder seating features associated with the Shoulder (Regular) type. If your die design uses tight guidance, verify the intended tolerance class for D and the mating guide bore to prevent lateral play or friction during cycling.