Vlier SPFP54 Press Fit Spring Plunger Stainless Steel

Product Description

The VLIER SPFP54 is a press fit spring plunger made from stainless steel, designed for light end force positioning and indexing applications in precision mechanical assemblies. The plunger body measures 0.521 inches in length with a 0.25 inch body diameter, and the stainless steel nose plunger has a diameter of 0.168 inches with a projection of 0.125 inches. Initial end force is 2.5 pounds, increasing to a final end force of 6 pounds. The flanged press fit design allows installation without threading, making it suitable for use in fixtures, jigs, and automated equipment where consistent, repeatable part positioning is required. Machinists, toolmakers, and mechanical assembly technicians typically install this component.

The SPFP54 is suited for light-duty positioning applications in production tooling, fixture plates, machine components, and precision assemblies. Its small form factor and press fit installation make it a practical choice where space is limited and threaded installation is not practical or desired. The stainless steel construction provides corrosion resistance in light industrial and cleanroom-adjacent environments. This plunger is appropriate for applications specifying light end force, where a controlled, repeatable detent action is needed without heavy spring resistance.

Key Features

• Press fit installation eliminates the need for threaded bores, simplifying assembly
• Stainless steel body and nose material for corrosion resistance
• Light end force range: 2.5 pounds initial to 6 pounds final
• Flanged design with 0.312 inch flange diameter and 0.055 inch flange thickness for positive seating
• Compact profile: 0.521 inch body length and 0.25 inch body diameter
• No locking element, providing free spring-loaded plunger action

Compatibility

Designed as an OEM-style replacement or new-installation spring plunger for light end force press fit applications in precision mechanical tooling and fixture assemblies.

Installation Notes

Installation is performed by pressing the plunger body into a properly sized bore using a press or appropriate hand tools. Ensure the bore diameter and depth conform to the manufacturer specifications for a secure interference fit. Power down and de-energize any equipment before installing or servicing components in mechanical assemblies. Do not hammer the plunger directly on the nose or plunger projection, as this may damage the spring or nose element.