Ball Lock Ejector Punches - Heavy Load Economy (SKH51 Steel)

Ball lock ejector punches are used in injection mold tooling where a controlled, non-slipping transfer of force is required to push parts out of ball-lock cavity systems. This heavy-load economy variant, built with SKH51 steel and a stable shoulder design, helps maintain punch retention and alignment under repetitive cycling.

• Automotive connector and housing molds: Choose this punch when frequent ejection cycles and robust wear resistance are needed. The regular shoulder supports consistent engagement with the retainer features and reduces alignment drift during production.
• Consumer and appliance part ejection: The round/flat-capable tip options (round, rectangle, oblong, and double-flatted variants) allow the punch face to match common ejector contact areas for predictable part release.
• General industrial molded components: Select the appropriate shank diameter (10–32 mm) and full-length alteration range to fit deeper ball-lock arrangements while keeping stable motion and reliable seating.

This product uses SKH51 steel for long-run ejection performance. SKH51 corresponds to the AISI M2 equivalent high-speed steel family, offering a strong balance of wear resistance and toughness for sliding/impact conditions common in ejector systems.

• Heat treatment state: Typically supplied as a hardened steel condition suitable for machining and subsequent mold fitting; final performance depends on the supplier’s heat treatment practice and any post-processing steps used in your mold shop.
• Hardness / performance trade-off: Higher hardness improves abrasion resistance at the tip and shank interface, while excessive hardness without adequate tempering can reduce toughness under shock loads.
• Why SKH51 here: Compared with lower-alloy tool steels, SKH51 is better suited to heavy-duty ejection where tip wear and repeated load cycling are critical.

Correct sizing is essential so the punch tip geometry seats properly inside the ball-lock cavity and maintains straight-line travel. Start by matching the shank diameter D to your ball-lock guide/receiving components: options are 10, 13, 16, 20, 25, 32 mm.

• Choose the tip form: Select the required Tip Shape (Round, Rectangle, Oblong, Double Flatted Round, Radius Rectangle) to match the ejector contact area on your molded part.
• Set tip dimensions: Use P (2.5–22 mm), W (2.5–7 mm), and tip corner radius R (0.15–15.95 mm depending on option). Tip length is selected via B (L or S), while tip dimension alteration ranges PC (1.25–11 mm) and WC help fine-tune the fit to cavity geometry.
• Verify overall length: Use L (80–100 or 71–100 mm) and confirm the LC (47–99.9 mm) full-length alteration requirement.
• Tolerance/fit: Ensure dimensional compatibility with your existing ball-lock tolerance stack; when working near the lower/higher end of the provided ranges, confirm clearance and retention engagement in the mold assembly.