SKD11 Steel Ejector Punch Blank with Locating Dowel Hole (D2 Equivalent)

This ejector punch blank is used in die and press tooling where reliable punch-to-die alignment is critical. The locating dowel hole enables repeatable centering during assembly, helping prevent drift and uneven wear under cyclic loading.

• Heavy-duty die work: For progressive or transfer tooling, the SKD11/D2-equivalent construction supports stable shank guidance and abrasion resistance when punches strike repeatedly.
• Ejector systems in stamping: Select the standard or spring reinforced type to manage part ejection forces while maintaining punch alignment across press cycles.
• Precision punch stations: The m5-referenced shank diameter tolerance supports consistent fit-up with guide components, improving long-term alignment consistency.

Overall, this variant is suited for applications that require secure centering, predictable ejector behavior, and durable performance in wear-prone die environments.

The blank is made from SKD11 steel, which is commonly treated as a D2-equivalent tool steel for wear-focused punch components. SKD11 provides strong wear resistance for abrasion-prone die edges and guiding surfaces, with a toughness that is suitable for heavy-duty punch operation when properly heat treated.

• Heat treatment (typical for D2-class steels): Usually quenched and tempered to a working hardness target, balancing edge stability with resistance to chipping.
• Hardness & trade-offs: After quench & temper, hardness is typically selected in a mid-to-high HRC range to maximize wear resistance, while acknowledging that higher hardness can reduce impact toughness if not tuned for the application.
• Manufacturing approach: Produced as a ground/formed punch blank, then finished to the required dimensions and prepared for subsequent machining into an ejector punch.

If comparing alternatives, D2-equivalent steels generally prioritize wear over maximum toughness; choose them when alignment stability and surface durability matter most.

Select the blank dimensions to match the ejector punch shank fit and the required stroke/clearance envelope in the die. Start by choosing the shank diameter D (10 ~ 45 mm) that matches your die’s guiding components and retains the intended m5 fit-up. Use the shank diameter and the locating dowel hole feature to ensure correct centering.

• Length L: Available ranges are 60–120 mm or 100–120 mm depending on the variant; confirm this against your ejector travel and available die shut height.
• S dimension: Choose from 28, 36, 37, 40, 50 mm to align with your punch mounting geometry and spacing requirements.
• LC (full length alteration): Select within 40–119.9 mm or 90–119.9 mm based on your planned finish-machining allowance and final assembly length.

For spring reinforced builds, verify that the selected L and LC still provide adequate clearance under load.