Key Flat Shank Ejector Punches DLC Coating

Key flat shank ejector punches are used in injection and press tooling where an ejector system must deliver consistent stroke positioning under repeated high-load cycles. The spring reinforced variant supports stable stepped guidance, helping reduce deflection and maintaining alignment between the ejector face and the molded part.

• Automotive connector and small housing molds: DLC (XCD) surface treatment improves wear resistance on the punch tip during frequent ejection cycles, supporting long-term dimensional stability around the ejector area.
• Appliance and electronics part molds: The round/rectangle/oblong and double-flatted tip shapes allow designers to match part geometry while the single-stepped shank helps control ejector movement in the guide.
• General die/press applications with heavy loads: Choose the spring reinforced jector to enhance repeatability, especially where load variations can otherwise disturb punch guidance.

This combination—spring reinforced guidance plus DLC wear protection—makes the product well-suited for tooling that requires fatigue resistance and controlled ejector behavior.

The base material is described as powder high-speed steel (HSS), selected for reliable precision across production cycles. HSS tooling generally offers a favorable balance of wear resistance and toughness, though higher hardness often reduces impact toughness—so the coating and reinforcement design are important for heavy-duty ejection.

• DLC (XCD) coating: provides a hard, low-friction wear surface to protect the punch tip and shank contact areas during repeated ejection.
• DLC + WPC (optional): adds an additional protection layer, typically chosen when surface durability requirements are higher than DLC alone.
• Heat treatment state: not explicitly specified in the provided data; verify coating compatibility and substrate hardness at the time of ordering.

For abrasion-dominant cycles, DLC (XCD) is the first selection. For harsher environments where additional surface protection is desired, the DLC + WPC variant can be considered.

Select the punch size by matching the ejector tip geometry and shank diameter to your die insert design and the ejector guide system. Start with the D (shank diameter) in the range 4–25 mm; this must fit the corresponding guide/bushing ID and maintain stable stepped guidance.

• Tip shape: choose from round, rectangle, oblong, double-flatted round, or radius rectangle to match the part ejection contact area.
• Tip dimensions: use P = 1–18 mm, with additional dimensional parameters PC = 1.8–9 mm and W = 1–6 mm, WC = 1.8–5 mm depending on the selected tip form.
• Overall length & head fit: available L ranges include 50–80, 50–100, 60–100, 40–80, and 40–100 mm. Confirm LC = 27–90.1 mm (full length alteration) and LCT/LMT = 27–90.1 mm (tolerance/alteration references) against your press/die stack-up.
• Tolerances/fit: head thickness tolerance change parameters (LCT and LMT) indicate how total length may be altered to achieve the required fit; select the variant that preserves your critical clearances.

If your design requires a specific contact width or corner radius, use the provided R = 0.15 mm and the tip alteration values to ensure controlled engagement.