EGBZ Oil-Free Ejector Leader Bushings Long Guide

This oil-free long guide bushing is used in injection mold ejector mechanisms where stable leader alignment is critical for smooth part release. In large mold builds—such as automotive connector housing molds—long guidance helps keep the ejector system concentric during stroke, reducing the risk of uneven wear or stick-slip at the beginning of ejection.

• Automotive connector molds: Long guide length (options including 25, 33, 38, 43, 53, 68 mm) supports consistent alignment across repeated cycles, while the copper alloy oil-free design reduces lubrication requirements.
• Consumer electronics enclosures: Where contamination control matters, an oil-free leader bushing supports repeatable motion without adding external lubricant to the mold cavity environment.
• General die-casting/ejection systems: The guidance length and inner diameter range (d = 13–50 mm) allow integration with type EGBZ leader bushing layouts for low-maintenance tooling.

The EGBZ oil-free leader bushing uses a copper alloy construction engineered for self-lubricating, stable guidance. Copper alloy oil-free bearing materials are chosen for consistent sliding behavior under repeated ejector strokes, supporting smooth ejection while lowering maintenance associated with frequent lubrication.

• Heat treatment: The provided data specifies copper alloy oil-free construction; specific hardness and heat-treatment state (e.g., quenched & tempered, nitrided) are not included in the supplied specifications.
• Wear vs. toughness trade-off: Copper alloy oil-free designs typically balance good wear resistance in sliding applications with adequate toughness for cyclic ejection loads.
• Material comparison: Compared with steel guide components that rely on oil/grease, an oil-free copper alloy bushing reduces dependency on external lubrication—helpful when cleanliness or maintenance intervals are constraints.

Correct sizing ensures concentric leader guidance and predictable ejector motion. Select the bushing by matching the inner diameter (d) to the ejector leader/shaft diameter and choose the length (L) according to the required alignment zone in your mold.

• Inner diameter: Available d = 13–50 mm. Match d to the leader diameter with proper clearance for smooth travel and to accommodate thermal/assembly variations.
• Length options: L is offered as 25, 33, 38, 43, 53, 68 mm. Use a longer L when you need a greater guidance distance to maintain alignment over the full stroke.
• Compatibility: Designed for type EGBZ leader bushing applications—confirm your leader bushing layout uses the EGBZ geometry family.
• Tolerance/fit: Because no tolerance values are provided, finalize fit by referencing your mold drawing requirements and leader shaft tolerances to prevent binding while maintaining alignment.