Self-Lubricating Ejector Bushings Bronze, Inch

This oil-free, self-lubricating bushing is used in injection mold ejector systems where clean, consistent slide guidance is critical. It fits into ejector guide assemblies to control friction and help maintain stable running performance across repeated molding cycles.

• Automotive connector and housing molds: When long ejector travel and frequent cycle starts/stops demand predictable alignment, the copper-alloy self-lubricating surface supports low-friction guidance without external lubrication.
• Large die-casting and finishing molds: In high-duty tooling, the bronze body helps manage wear at the guide interface while keeping movement smooth during ejection.
• Medical and precision components with contamination limits: Oil-free operation supports cleaner cavity shutoff and ejection zones where minimizing stray lubricant is beneficial.

Choose the inch series variant to match common mold component sizing in North American tooling and to simplify integration into existing guide layouts.

The bushing is described as an oil-free copper alloy self-lubricating design with a bronze bushing body. Copper-alloy self-lubricating surfaces are commonly selected for sliding applications because they can provide stable friction behavior under repeated motion while reducing reliance on added grease or oil.

• Wear resistance vs. toughness trade-off: For ejector guidance, bronze/copper alloys prioritize smooth sliding and manageable wear, typically at the expense of maximum impact toughness compared with harder tool steels.
• Heat treatment state: The provided data does not specify a steel-grade equivalent, hardness (HRC), or heat treatment (e.g., quench & tempering or nitriding), so these parameters should be confirmed from the supplier’s material certificate for critical performance requirements.
• Manufacturing process: The unit is supplied as a finished bushing for direct press-fit or guided mounting in mold housings; final fit depends on bore/guide block tolerances.

If multiple bronze/copper formulations are offered, compare the specific self-lubricating content and wear targets rather than relying only on general alloy family assumptions.

Select the bushing based on the three functional dimensions provided: Nom. inside diameter (in), A (Outside diameter) (in), and L (Length) (in). Correct matching ensures proper alignment of the ejector member and stable guidance with minimal side load.

• Match the shaft/ejector diameter: Choose the Nom. inside diameter from 0.750, 0.875, 1.000, 1.250, 1.500, 2.000 in to fit the ejector or guide shaft.
• Check mounting clearance in the guide block: Use the corresponding A (outside diameter) options: 1.1255, 1.2505, 1.3755, 1.6255, 2.0005, 2.5005 in to confirm that the pocket/bore can accept the bushing without interference beyond your design.
• Set bearing length: Select L from 1 1/2, 1 3/4, 2, 2 1/4, 2 1/2 to achieve the desired support length for the ejector stroke and expected loads.

Tolerance and fit considerations are not listed in the input data; engineers should therefore verify the required clearance/press-fit approach against the guide block machining tolerances and any standard used internally.