EGBL Ejector Leader Bushings - Ball Bearing Integrated

This ball-bearing integrated ejector leader bushing set is used in injection mold tooling where ejector motion must remain straight and repeatable under frequent cycling. It is commonly specified for automotive connector and housing molds, supporting the ejector system to maintain alignment and reduce mis-travel that can damage ribs, pins, or fragile cores.

In appliance and industrial enclosure molding, the integrated bearing design helps minimize sliding friction, improving smooth stroke transfer and helping maintain consistent ejection force over long production runs.

For large-die-casting and high-cycle automation, the linear guidance function supports stable positioning around the ejector train, which is especially beneficial when molds incorporate sensors, robotic part handling, or tightly controlled ejector timing. With an inner diameter range of 6–30 mm, this variant is suited to match typical ejector leader diameters while retaining smooth, stable travel.

The provided product data specifies the ejector leader bushing configuration and inner diameter (d) range of 6–30 mm, but it does not include a steel grade, heat-treatment condition, or measured hardness (HRC). Material selection and heat treatment are therefore not explicitly documented for this SKU.

In general for ejector leader bushings with ball-bearing integrated guidance, performance depends on achieving:

• High wear resistance to tolerate repeated contact and motion during ejection
• Balanced toughness to resist chipping or cracking under shock loading
• Dimensional stability after heat treatment to maintain clearance and alignment

If you need a specific grade comparison (e.g., nitrided vs. quenched-and-tempered steels) or a hardness target, share the steel/heat-treatment options used for your chosen set/spacer/snap-ring variant so the material_html can be accurately tailored to that configuration.

Selection starts with matching the ejector leader bushing inner diameter d to the ejector rod/leader shaft diameter. This product supports d = 6–30 mm, so choose the size that most closely fits the leader’s nominal diameter and maintains proper clearance for smooth travel.

Next, confirm whether your assembly requires the Set, Only spacers, or Only snap rings product type. Use spacers to achieve required axial spacing and use snap rings to secure the bushing/bearing assembly in the guide housing.

• Core/cavity interface: ensure the leader bushing is positioned so ejector stroke alignment is maintained from start to full travel.
• Fit and tolerance: maintain consistent clearance between the bushing ID and the leader shaft to prevent binding; avoid excessively tight fits that can increase friction and accelerate wear.

If your leader shaft is near the upper or lower limit of a diameter step, verify that the assembled stack (set + spacers + snap ring) preserves the intended axial play without shifting under cycle load.