Ball Lock Ejector Punches - Light Duty, Inch, XNM Coating

Ball-lock ejector punches are used in injection mold tooling where consistent part release is required, particularly in light-duty dies with controlled ejection loads. These inch-coded ejector punches are well suited for consumer and appliance housing molds, helping maintain stable ejector positioning through repeated press cycles so ejection force remains predictable.

In electronics and connector overmolding, the ball-lock retaining geometry supports alignment during cycling and reduces the risk of ejector drift, which is important when tight clearances are designed around the ejector pin system. The light-duty format and standardized point length codes simplify matching the ejector travel and contact timing to the mold’s cavity requirements.

With the XNM coated surface variant, these punches also perform effectively in high-cycling trim and retraction applications, where wear on the contact area can accumulate over time. The available steel options (M2 or PS4) provide suitable toughness-to-wear trade-offs for reliable tooling performance.

This series is offered in M2 or PS4 tool steel, paired with an XNM coating to improve surface wear behavior. M2 is a high-speed steel grade commonly selected for better wear resistance under repeated contact, balancing hardness with sufficient toughness for light-duty ejection components. PS4 provides an alternative tool-steel option intended for durable performance with different toughness and wear characteristics for shop-to-shop material preferences.

• Heat treatment state: Hardened steel options are supported, consistent with ejector punch service needs (pin-to-cavity contact surfaces require hardness for abrasion resistance).
• Wear resistance vs. toughness: Higher hardness increases resistance to scuffing and peening, but can reduce tolerance to shock—so select based on expected ejection load and cycle frequency.
• Coating effect: XNM coating reduces friction and improves wear at the working surface during repeated ejection/retraction.

To select the correct ball-lock ejector punch for your mold, match the shank diameter (D) and point length code to the ejector system’s geometry and required engagement depth. This series supports D = 25 ~ 100 in and tip shapes H, J, K, L, N, O, R, V, X, Y, Z, allowing configuration to the cavity/core clearance and ejection contact profile.

Then choose the correct coded lengths: standard point length & L are offered in 200 ~ 400, 200 ~ 500, 200 ~ 600, or 225 ~ 600 ranges, while point length variants B and L are available across 225 ~ 400, 225 ~ 500, 225 ~ 600 options (and a separate fixed option noted as 250 ~ 600). Confirm that the selected length provides the intended ejector travel without bottoming in the guide block.

• Fit considerations: Ball-lock geometry depends on retained positioning, so keep the shank diameter aligned with the guide/retainer bore to avoid binding or misalignment.
• Configurable dimensions: Tip shape, D, group (J2/J3/J4/J6/J9), and point length codes are configurable; R, P, and W dimensions are also specified as allowable ranges (P 0.05 ~ 0.75, W 0.05 ~ 0.437, R 0.007).