JIS Standard Steel Ball Lock Ejector Punches Economy

This economy ball lock ejector punch is used in injection or stamping die sets where controlled punch ejection is required after forming or punching cycles. The round tip style helps maintain stable seating and positioning, supporting consistent ejection timing across repeated mold/die operations.

• Punch forming tooling for electronics and automotive subcomponents: The hardened, wear-oriented steel supports long production runs where the punch tip repeatedly contacts die surfaces.
• General-purpose press tooling for flat-sheet or panel features: Choose variants with different tip dimensions (P/PC and W/WC) to match the cavity opening geometry and avoid misalignment.
• Die assemblies needing predictable ejector stroke: The quenched hardened structure helps preserve geometry under friction, reducing drift that can affect part quality.

Its economy configuration is well suited for applications prioritizing repeatable ejection with reliable wear resistance in standard die set environments.

These economy ejector punches are made from a SKH51 equivalent steel, selected for balanced hardness and wear resistance in sliding/impact ejection conditions at the die interface. The product description specifies a quenched hardened steel state, providing improved resistance to abrasive wear from repeated punch contact.

• Wear resistance: Quenched-hardening supports stable tip geometry during frequent ejection cycles.
• Toughness trade-off: Higher hardness improves wear performance but can reduce impact toughness compared with softer tool steels; appropriate setup and alignment are important for long life.
• Heat treatment state: Quenched and hardened prior to precision grinding to maintain consistent ejection surfaces.

If your tooling prioritizes extreme toughness over surface wear, a lower-hardness alternative grade may reduce chipping risk; however, this variant is specifically positioned for wear-focused economy punch forming.

Select the ejector punch dimensions by matching the cavity/core feature geometry to the available tip and shank sizes. Start with the tip shape (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle) to align with the part pocket or die opening.

• Shank diameter (D): Choose from 10, 13, 16, 20, 25, or 32 mm based on the ejector guide/bore capacity in your die set.
• Tip geometry: Use the P (3–22 mm) and W (3–31.9 mm depending on series option) plus their alteration ranges PC (2–15 mm) and WC (2–2.99, 3–5.99 mm) to tune fit to the punching profile.
• Length: Select L based on available ranges (80–100 mm or 71–100 mm) and confirm against the LC full length alteration window (47–99.9 mm) for your stack-up.
• Tip corner radius (R): Available from 0.15 up to multiple options (e.g., 0.15–4.95 up to 0.15–15.95), helping control stress concentration at the tip.

For reliable ejection, ensure mechanical fit to the die pocket and guide features; plan for clearance/fit so the punch seats consistently without binding through the full stroke.