SKD11 Steel Ball Lock Ejector Punches - Light Load, Wrench Flat

These ball-lock ejector punches are used in injection mold tooling where reliable blank ejection is needed under light to moderate load, including consumer electronics housings and automotive interior components. The wrench-flat shoulder supports stable handling and consistent punch seating, helping maintain alignment during repeated insertions/extractions.

In progressive die and plastic injection workflows that use ball-lock style features, the round-to-rectangular tip options support controlled engagement with ejector/guide surfaces. The SKD11-equivalent D2 construction is suited to smooth ejection performance by balancing wear resistance at the tip with sufficient toughness for routine cycles.

• Use the wrench-flat shoulder to reduce slip and improve repeatable alignment in the mold base.
• Select the appropriate shank diameter (D: 10–32 mm) to match ball-lock support stiffness.
• Choose tip geometry and dimensions (P/W/R) to suit the cavity blank contact area and reduce localized stress.

This variant is built from SKD11 steel, commonly referenced as an AISI D2-equivalent tool steel. It is selected for its combination of wear resistance and reasonable toughness in ejector/punch applications where the working tip experiences repeated contact.

• Wear resistance: High hardness steel condition supports abrasion resistance at the tip and shoulder contact zones.
• Toughness trade-off: Like D2-class steels, increasing hardness improves wear but can reduce impact toughness, so proper mounting and alignment are important.
• Heat treatment: Typically supplied and used in a hardened and tempered state for elevated hardness (exact HRC is not provided in the input data).

Compared with tougher but less wear-focused grades, SKD11/D2-class steels are favored when tool life at the tip is driven more by surface wear than by high shock loading.

To select the correct ball-lock ejector punch dimensions, start by matching the shank diameter (D) to the receiving bore/ball-lock support in your mold. Available shank sizes are D = 10, 13, 16, 20, 25, 32 mm.

Next, confirm the overall geometry. The L (L dimension) range is 71–90 mm (and 63–90 mm depending on configuration), while the LC (full length alteration) is 47–89.9 mm. Ensure these lengths clear the cavity/core structure and allow the punch to reach the required ejection position.

• Choose tip shape (Round/Rectangle/Oblong/Double Flatted Round/etc.) based on blank contact needs.
• Match tip dimensions: P = 2.5–22 mm, W = 2.5–31.9 mm, and tip corner radius R = 0.15–15.95 mm (range depends on configuration).
• Account for alteration dimensions: PC = 1.25–11 mm and WC = 1.25–6.99 mm when customizing tip width/length.

Because tolerance values are not provided, verify fit against your mold’s ball-lock seat geometry and consider standard clearance/fit requirements for assembled punch systems.