Bronze-Plated Steel Extra Long Shoulder Plain Guide Bushings - Demountable

Where it’s used: These demountable plain guide bushings are specified in leader/ejector die sets that need straight, rigid guidance to keep moving components aligned across repeated press or molding cycles.

• Automotive connector & bracket tooling: In progressive or transfer tooling, the extra-long shoulder and plain guide design help maintain stable die-to-punch alignment, reducing scuffing and mismatch during high cycle runs. The bronze-plated copper alloy with steel construction supports controlled wear at the guide interface.
• Appliance/household housings: For deep-draw or multi-stage forming dies where service access matters, the demountable configuration enables removal and replacement without disturbing the entire die assembly.
• Precision small-part molds: When tight guidance repeatability is critical, the demountable installation supports reliable setup and maintenance, improving uptime while preserving alignment.

Why this variant fits: The bronze-plated surface is suited for wear-controlled guidance, while the steel construction maintains dimensional stability for consistent leader performance.

Construction: This bushing uses a bronze-plated copper alloy surface on a steel structural body. The bronze-plated layer supports wear resistance and controlled friction at the guide interface, while the steel core improves stiffness for long, straight guidance.

• Wear vs. toughness: Bronze-rich guide surfaces are chosen for stable sliding behavior, but overall impact performance is governed by the steel substrate.
• Heat treatment: The provided data lists material as “Bronze plated, Steel” but does not specify a hardness value or whether the steel is quenched & tempered, nitrided, or pre-hardened. Therefore, heat treatment state should be confirmed with the supplier for hardness-driven wear/toughness requirements.
• Comparative note (available materials): With only “bronze plated” versus “steel” indicated, selection is primarily about using the bronze-plated wear surface combined with steel structural support rather than switching full steel grades.

1) Match the post diameter (A): Select a bushing whose post diameter A is within 1 ~ 3 in. A correct fit minimizes radial play that can translate into leader misalignment.

2) Match the operating length (L): Choose the L value from the available options: 3.938, 4.125, 4.188, 4.375, 4.625, 4.875 in. Use the required engagement/support length determined by the die stack-up, guide travel, and required rigidity.

• 3) Align shoulder function: The extra-long shoulder is intended to increase guidance stability over the stroke; therefore, confirm that the selected L provides sufficient shoulder coverage in both forward and maximum open positions.
• 4) Tolerance/fit considerations: Because the data provides only dimensional ranges (A and discrete L values), engineers should verify the final interference/clearance against their leader diameter and bushing bore tolerance requirements during detailed design.
• Configurable vs. fixed: A is a selectable range (1–3 in), while L is available only in the specified discrete lengths.