Vlier DL54 Threaded Ball Plunger 1/4-20 Delrin Body

Product Description

The VLIER DL54 is a threaded ball plunger designed for controlled end-force applications in mechanical assemblies, fixtures, and tooling. It features a 1/4-20 thread, a 0.125-inch stainless steel ball, and a Delrin body measuring 0.531 inches in length. Initial end force is 1 pound, with a final end force of 2.5 pounds. Maximum ball reach is 0.03 inches. The Delrin body resists corrosion and reduces friction, making this plunger well-suited for precision positioning, indexing, and light-duty detent applications. Machinists, toolmakers, and mechanical assemblers typically install this component in production tooling, jigs, and fixtures.

This ball plunger is used in applications requiring repeatable, controlled positioning force in a compact threaded package. The 1/4-20 thread allows installation in standard tapped holes common across a wide range of industrial fixtures, machine components, and assembly tooling. The stainless steel ball provides durability and corrosion resistance at the contact point. The purple color code identifies the force range for quick visual identification during assembly or maintenance. It is suited for both light-duty production tooling and bench-level mechanical assemblies.

Key Features

• 1/4-20 thread for installation in standard tapped holes
• 0.125-inch stainless steel ball for durable, corrosion-resistant contact
• Delrin body for low friction and corrosion resistance
• Controlled end force: 1 pound initial, 2.5 pounds final
• 0.03-inch maximum ball reach for precise, shallow detent engagement
• Purple color code for fast force-range identification

Compatibility

Designed for use in standard 1/4-20 tapped holes in mechanical fixtures, jigs, tooling plates, and assembly equipment requiring controlled detent or positioning force.

Installation Notes

Install using a standard hex key or driver appropriate for the 1/4-20 thread. Ensure the tapped hole is clean and free of debris before threading in the plunger. Do not overtighten, as the Delrin body can be damaged by excessive torque. Verify ball movement and force engagement before placing the assembly into service.