JIS Standard Hardened Steel Key Flat Shank Ejector Punches (TiCN Coating)

Key flat shank ejector punches with a spring-reinforced jector arrangement are used in injection mold tooling where stable guidance and consistent stroke repeatability are required. The single-stepped key shank supports positive alignment during press ejection, reducing lateral wobble that can affect cavity/core contact and part surface finish.

• Automotive and appliance housings: In multi-up molds, the stepped key flat shank helps maintain smooth, repeatable ejection across the cavity layout. The available TiCN (XCN) coating supports stable wear behavior in production cycles with frequent tool cycles.
• General toolroom die and mold assemblies: These punches are specified to JIS-standard needs, making them suitable for maintenance, replacement, and sub-assembly in standard punch systems.
• Connector and insert molds: For ejector packs that require controlled guidance with varied tip geometries (round, rectangle, oblong, double-flatted round), the correct shank diameter within D = 4–25 mm supports reliable positioning under ejection load.

Choose the TiCN-coated variant when abrasion/wear and low-friction sliding action are priorities during repeated ejection.

These key flat shank ejector punches are offered in multiple tool steels: SKH40 equivalent (powdered high-speed steel), SKH51 equivalent (AISI M2), and SKD11 equivalent (D2). Material selection balances wear resistance against toughness and workability for different duty cycles.

• SKH51 (M2 equivalent): High hardness tool steel typically used when wear resistance is critical; it is well-suited for repetitive ejection surfaces.
• SKD11 (D2 equivalent): A high-carbon, high-chromium tool steel option when abrasion resistance is required, with attention to toughness trade-offs typical of D2-type grades.
• SKH40 (powdered HSS): Powder metallurgy benefits can support more consistent microstructure for wear-focused applications.

The provided variant includes optional surface treatment: none or TiCN (XCN) coating. Heat treatment is described by the “JIS Standard Hardened Steel” designation; for exact HRC and quench/temper parameters, confirm with the specific configured part/material option.

To select the correct ejector punch, match the shank diameter (D), tip geometry/dimensions, and the length characteristics to the ejector system and mold cavity/core needs.

• Shank diameter: Choose D within 4–25 mm to ensure proper fit in the ejector housing/bushing and stable guidance during stroke.
• Tip dimensions: Select the tip type (round, rectangle, oblong, double-flatted round, radius rectangle) and confirm tip size within P = 1–18 mm, with tip width W = 1–6 mm, and corner radius R = 0.15 mm (as specified).
• Overall length: Use L = 40–80 mm as the key reference dimension. Verify full length alteration limits using LC = 27–90.1 mm (and associated tolerance/alteration limits such as LCT and LMT = 27–90.1 mm).

For close-fit ejector builds, account for the provided tolerance/alteration ranges (e.g., PC = 0.9–9 mm) and select the TiCN-coated or uncoated configuration based on expected sliding wear. Tip/head alterations vary by configuration, so lock dimensions to the configured part drawing for your assembly.