Long & Extra Long Shoulder Bushings - Wring Fit Style, Inch

Long & extra long shoulder bushings with a wring-fit style are used inside leader-ejector space die sets to control stable guide alignment through repeated press cycles. They are particularly suited for automotive connector and bracket tooling, where consistent concentric motion helps prevent misalignment-related wear between moving die components.

In appliance and general industrial forming dies, the long shoulder geometry supports guidance over a greater stroke length, improving straight-line movement when loads fluctuate during cycling.

For precision cutting and progressive die inserts, the selectable bushing type—bronze-plated for smooth sliding or solid steel for tougher service—helps balance friction control and wear resistance. Ground/unground options allow you to match your assembly requirements and achieve the intended fit behavior in the guide system.

• Plain and ball guide configurations support alignment and reduced friction
• Long/extra long shoulder length extends guidance for smoother motion
• Wring-fit style helps maintain concentric positioning under production loads

This bushing series is offered in three material/finish configurations: bronze-plated (copper alloy base), solid steel, and ball guide style. The bronze-plated option is intended to improve running smoothness and provide good wear behavior under sliding contact in die guide systems.

The solid steel variant is selected when the application needs higher structural robustness and wear capability. For the ball guide configuration, the guidance mechanism improves alignment behavior by combining rolling-style contact with the shoulder’s long guidance length.

• Bronze plated: focus on smooth motion and sliding wear performance
• Solid steel: focus on durability and tougher operating conditions
• Ground vs. unground: affects surface condition for fit and assembly behavior

Heat treatment details (e.g., nitriding, quench & tempering, and target HRC) are not specified in the provided data, so hardness values cannot be stated from the current documentation.

To select the correct bushing dimensions, match the inner diameter d and length L to your leader/pin and the intended guide engagement. This series provides d = 1 ~ 7 in, D2 (outer diameter) = 1.125 ~ 3.64 in, and L = 2.813 ~ 5.875 in.

Next, choose the shoulder type based on how much guidance length your die set requires: Long shoulder for standard guidance engagement or Extra long shoulder for extended alignment through longer travel. Confirm whether you need Bronze plated - Long shoulder, Solid steel - Long & Extra long shoulder, or Bronze plated - Extra long shoulder.

• Select d to fit the leader/pin diameter and maintain the intended wring-fit behavior
• Select L to ensure sufficient guide engagement during cycling
• Select D2 to match the surrounding die guide bore/space for proper mounting
• Choose Ground or Unground to align with your assembly/fit strategy

Product documentation lists Class 1 and Class 2 options; use class selection to align with your required dimensional/fit quality level where applicable.