D2 Steel Ball Lock Ejector Punches - Light Load, Economy

Ball-lock ejector punches are used in injection mold tooling where simple, light-duty blank ejection is needed and stable alignment helps reduce cycle-to-cycle variation. The ball-lock head provides consistent engagement between the punch and the ejector plate, which is particularly useful when repeatability matters in higher-rate production.

• Appliance and consumer electronics housings: suited for ejecting thin plastic parts and inserts where loads are moderate; the compact, economical design helps keep mold height and cost controlled.
• Automotive interior components: appropriate for light loads such as ejection of ribs, clips, and housings after cooling; stable positioning helps maintain part geometry at the ejection stage.
• Packaging and lightweight closures: ideal for multi-cavity molds performing frequent eject cycles; the round/rectangular and corner-radius tip options support clean contact with varied part land areas.

Built with a D2-equivalent steel system and ground shank geometry, this variant balances wear resistance with practical toughness for cost-effective production tooling.

This series uses SKD11 / D2-equivalent tool steel construction (D2 class), selected for light-load ejection applications where wear resistance and stable long-term engagement are important. D2-type steels provide good resistance to abrasive wear at the punch/part interface, supporting consistent ball-lock engagement over many cycles.

• Hardness & performance trade-off: D2-class steels are typically heat-treated to achieve moderate-to-high hardness (commonly in the HRC ~50–62 range depending on supplier heat treatment), which increases wear resistance but can reduce toughness if pushed too high.
• Heat treatment state: ground shanks and hardened tool-steel cores are generally used in quenched & tempered conditions for a balance of hardness and toughness.
• Why this matters vs alternatives: compared with lower-alloy steels, D2-class material better resists wear and maintains dimensional stability at the working surface; compared with higher-alloy options for very heavy loads, it prioritizes economy for simpler ejection duty.

To select the correct ball-lock ejector punch, match the shank diameter (D), overall length settings, and the tip geometry to the cavity/core and the required engagement depth. Available shank diameters are 10, 13, 16, 20, 25, or 32 mm, so choose the largest diameter that fits the ejector plate and guide requirements without interfering with surrounding steel.

• Length matching: choose L from 71–90 mm (L set) or 63–90 mm (depending on configuration). Verify LC (full length alteration) within 47–89.9 mm or 46–89.9 mm based on your plate thickness and required stroke clearance.
• Tip contact sizing: select Tip shape (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle). Match P from 3–22 mm and the tip width W ranges (e.g., 3–9.9, 6–12.9, 6–31.9) to the part land/gusset area.
• Tolerances & fit: use the listed tip dimension alterations (PC up to 2–15 mm, WC up to 2–6.99 mm) to fine-tune contact area while maintaining stable ball-lock engagement.