SKD11 Steel Ejector Punches with Locating Dowel Holes - HW Coating

These SKD11-equivalent ejector punches with integrated locating dowel holes are used inside die assemblies to drive smooth, repeatable ejection while maintaining punch-to-die alignment. The locating dowel hole supports stable guidance during high-cycle press operation, helping reduce misalignment-related wear on both the punch and the surrounding bushings.

• Automotive and appliance die sets: Ideal for frequent ejection cycles where consistent tip positioning is critical for reliable part release; the single-stepped shank and dowel-hole arrangement help maintain straight travel under load.
• Electronics and connector housings: Used in precision cavity/core tooling requiring uniform clearance and minimal wobble; choose this variant when guiding accuracy and wear resistance directly affect dimensional stability.
• General industrial stamping: Suited for die stations that experience abrasive contact; the HW coating is designed to extend service life by improving wear performance under repetitive punch-to-die contact.

The base steel is SKD11 equivalent (D2), a tool steel chosen for its balance of toughness and abrasion resistance in ejector and die contact applications. In ejector tooling, this grade is typically heat treated by quenching and tempering to develop usable hardness for long-run wear performance.

The HW coating adds an additional wear-management layer for conditions involving repeated sliding or contact with die components. Expect a trade-off that is common to D2-family steels: higher hardness improves wear resistance, while excessive hardness can reduce toughness if heat treatment and operating conditions are mismatched.

• Wear resistance: Enhanced by SKD11(D2) base plus HW coating for repetitive press cycles.
• Toughness: Tempering supports toughness to prevent chipping in ejection-driven loading.
• Hardness (HRC): Not specified in the provided data; confirm with incoming material certs for exact HRC targets.

Select dimensions by matching the ejector punch tip geometry to the ejection force path and the available die layout around the core/cavity. This series covers shank diameters (D) from 10 to 45 mm, with tip dimensions ranging P from 3 to 35 mm, so begin with the required clearance and the guiding system bore/bushing size in your die.

• Tip length (B): Available in variants L, S, X; choose based on how much support the punch needs within the ejector plate region.
• Overall length (L): Provided in ranges 70–120, 60–120, 80–120, or 100–120 mm; pick the range that maintains full stroke engagement while avoiding bottoming or excessive stick-out.
• Full length alteration (LC): Use 34–72 mm to reach the target installed length; verify with your ejector plate thickness and stop limits.
• Tip dimension alteration (PC): Available at 2.8–30 mm to adjust the tip size fit for the part interface.

Confirm tolerances for alignment: the locating dowel hole is designed to work with the center/locating systems, so dowel-hole placement must correspond to your die’s locating features to minimize lateral play during ejection.