M2 Steel Ball Lock Pilot Punches - Tapered Tip

Ball lock pilot punches are used in injection mold tooling wherever repeatable part location is critical—especially during steel-to-steel alignment at cavity start-up and under high cycle loads. The tapered tip supports smooth pilot entry into mating bushings, helping ensure consistent lock-in for stable, low-misalignment starts.

• Automotive connector and housing molds: In locating features that guide inserts or thin-walled components, the tapered geometry improves initial centering and reduces the risk of eccentric engagement during rapid press cycles.
• Consumer and appliance assembly molds: For parts requiring accurate transfer from molding to downstream operations, the ball-lock style provides stable alignment so gates, slides, and assembly interfaces begin consistently.
• General die and mold systems: The heavy-duty inch construction and high-hardness M2 steel are suited for production environments where dimensional stability and wear resistance at the pilot interface matter.

This pilot punch is available in M2 steel (also listed alongside PS4). M2 is a high-speed steel grade that is typically selected for its high hardness, supporting dimensional stability at the ball-lock locating interface under wear and repeated mechanical engagement. Its wear resistance is well suited to maintaining consistent pilot geometry across long production runs.

• XNM coating: The XNM coating is used to further reduce surface wear and help extend tooling life in high-contact conditions.
• Heat treatment (typical for M2 pilots): In mold tooling practice, M2 components are commonly quenched and tempered after machining to achieve the target hardness (often in the ~HRC mid-to-high range depending on vendor process), balancing hardness and toughness.
• M2 vs. PS4: When offered in multiple steels, engineers generally compare hardness and wear behavior against toughness and supplier-specific heat-treatment results; selecting between M2 and PS4 should be based on your expected contact pressure and impact risk.

Select the pilot punch by matching the locating interface geometry and engagement length to your mold’s mating features (bushings or corresponding ball-lock receivers).

• Shank diameter (D, in): Choose a part with D in the available range of 37 ~ 125 (in the product’s defined inch-coded scale). Ensure the shank clears the guide bore with the required running fit and avoids interference during thermal expansion.
• Point length and overall length options: Standard point length & L are offered in coded inch bands: 250–600, 250–700, 275–700, and 300–700. Confirm the selected length is sufficient for reliable ball-lock engagement without bottoming against the receiver.
• P dimension (in): The product provides 0.083 ~ 0.999. Use P to align with your mating feature’s ball-lock depth/spacing so engagement occurs within tolerance.
• Tapered tip benefit: The tapered tip helps pilot entry, but you should still verify that the selected lengths provide full lock-in under compression and press shut height variations.