Inch Self-Lubricating Shoulder Bushing - Demountable Style

This demountable self-lubricating shoulder bushing is designed for inch-format leader/ejector die sets where stable alignment and repeatable stroke control are critical. Its copper alloy plain guide surface supports low-friction motion and helps maintain consistent clearance under cyclic loading.

Use it in automotive and industrial connector molds to support rigid die-set alignment during opening/closing. The shoulder geometry and guide stability reduce side-load effects on rails and improve wear behavior in high-cycle molding.

It is also suitable for appliance and housings applications that require reliable ejection and long service intervals. The demountable style enables service-friendly replacement during maintenance without fully disassembling the die.

• Plain guide shoulder keeps the die set accurately located
• Self-lubricating copper alloy supports long guide life
• Detachable installation helps minimize downtime in scheduled service

The bushing uses a copper alloy plain guide design intended for self-lubricating performance. In guide applications, copper-based bearing surfaces provide inherent lubrication characteristics that reduce friction and support stable motion over repeated cycles.

• Wear resistance: copper alloy plain guide surfaces are selected to resist scoring and to maintain consistent sliding behavior.
• Toughness vs. hardness trade-off: compared with fully hardened tool steels, a copper alloy bearing surface prioritizes low-friction wear performance rather than maximum hardness.
• Heat treatment: no specific heat-treatment state is provided in the available specifications, so process details cannot be stated from the current data.

When choosing between copper-alloy self-lubricating designs and higher-hardness steel alternatives, engineers typically balance friction/wear behavior against load capacity and abrasion resistance, with this variant focused on long guide life through plain, self-lubricating contact.

Select the post diameter A to match the leader/bushing seat dimension in your mold base or guide block for inch tooling. The specified range is 1 ~ 3 in; choose the closest available dimension within this range to ensure correct alignment and load transfer.

Choose the required axial engagement length L from the available options: 2.688, 3.125, 3.188, 3.375, 3.625, 4.375 in. L must provide adequate support over the expected stroke and keep the shoulder fully seated under guide loads.

• Match to cavity/core requirements: verify that the bushing shoulder height and projected travel envelope align with the leader path to avoid binding or excessive clearance.
• Fit considerations: use your mold drawing’s critical dimensions and typical inch fits for the guide bore/seat; confirm clearance requirements to prevent rubbing while maintaining rigid die-set alignment.
• Configurable vs. fixed: A and L are selectable within the listed ranges; other features are fixed to the demountable style.