SKH51 Steel Equivalent Ball Lock Ejector Punches Heavy Load

Ball lock ejector punches heavy-load are used inside injection mold ejector systems where parts require reliable push-out under repeated cycling. The ball-lock retention helps prevent punch movement or loosening during ejection strokes, especially when the mold experiences high side loading from core/cavity interaction.

• Automotive and appliance injection molds: Suitable for housings and structural components with tough polymer blends, where a stable ejector stroke and controlled wear are critical. The heavy-load variant and hardened SKH51 steel equivalent support consistent actuation.
• Precision stamping and die casting molds: Used in strip or multi-stage tooling where abrasion and sliding wear can degrade ejector punches. The TiCN coating improves wear resistance to maintain ejection consistency.
• Thin-wall or deep-cavity molds: Helps reduce the risk of punch wear-related tolerance drift by combining secure retention with a TiCN surface for longer service life.

TiCN-coated SKH51-equivalent punches are particularly well-suited when cycle counts are high and ejector surfaces are exposed to frequent rubbing and impact.

This punch set is manufactured from SKH51 steel equivalent, selected for good wear resistance and service stability in high-frequency ejector use. For wear-focused performance, the surface is treated with a TiCN (titanium carbonitride) coating, which enhances hardness at the surface and supports longer tool life under sliding contact.

• Hardness/strength balance: Hardened SKH51-equivalent base provides toughness for repeated impacts, while TiCN improves abrasion resistance for maintaining punch geometry.
• Wear resistance vs. toughness trade-off: TiCN increases resistance to scuffing and abrasive wear; however, as with many hard coatings, edge regions still require correct sizing and alignment to avoid premature chipping.
• Coating state: The TiCN layer is applied after the punch is hardened, creating a hard wear surface over a tough substrate.

Compared with uncoated or lower-durability coatings, TiCN typically offers improved sliding wear resistance, which is important for heavy-load ejector strokes.

Select dimensions by matching the punch shank to the mold insert/control features and matching the tip geometry to the part ejection contact area. Use the provided D (shank diameter) options—10, 13, 16, 20, 25 mm—to fit the ejector bore/guide clearance and to transmit load safely.

• Choose the tip profile: Select from the available tip shapes: Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle. Ensure the tip shape aligns with the part’s eject contact surface to avoid point loading.
• Match length to cavity depth: Use L ranges of 80–100 mm or 71–100 mm, and confirm full-length alteration LC values such as 54–99.9 mm through 63–99.9 mm (depending on configuration).
• Control tip engagement: Confirm tip dimension P (3–18 mm) and corresponding alterations PC (e.g., 2.8–2.99 mm up to 9–17.99 mm) along with tip width W (3–6 mm) and optional radius R (0.15 up to 12.44 mm).

For best performance, set the tip engagement so ejection contact is stable without over-inserting; because alterations (e.g., PC/WC) vary by configuration, verify fit using the exact selected parameter set rather than assuming uniform offsets.