Vlier DSPFB59 Press Fit Ball Plunger 0.5 in Stainless

Product Description

The VLIER DSPFB59 is a press fit ball plunger designed for indexing, positioning, and light-duty detent applications in industrial assemblies. The stainless steel body measures 0.5 inches in diameter and 1.1 inches in length, with a passivated finish for corrosion resistance. The nylon ball measures 0.25 inches in diameter and provides a maximum reach of 0.161 inches. Initial end force is 4 pounds and final end force is 9 pounds. A flanged design locks the plunger axially in the bore without threading or adhesive. Machinists, tool-and-die technicians, and assembly line maintenance personnel are the typical installers.

This press fit ball plunger is used in jigs, fixtures, tooling plates, and precision machined assemblies where a repeatable detent or positioning action is needed. The flanged body seats flush against the mounting surface, making it well suited for through-bore installations in panels, platens, and fixture blocks. The nylon ball reduces marring on mating surfaces and is appropriate for applications where metal-on-metal contact is undesirable. Both light industrial and precision manufacturing environments commonly specify this style of plunger.

Key Features

• Stainless steel body with passivated finish resists corrosion in wash-down and high-humidity environments
• Nylon ball protects mating surfaces from scratching or galling
• Flanged design provides positive axial retention without threads or retaining compounds
• 4 pound initial force and 9 pound final force for consistent, repeatable detent action
• Flange diameter of 0.688 inches and flange thickness of 0.11 inches for reliable seating
• Press fit installation requires no special tools beyond a standard arbor or bench press

Compatibility

Designed as an OEM-style replacement or new-installation press fit ball plunger for use in machined bores with a 0.5 inch diameter receiving hole in industrial fixtures, tooling, and precision assemblies.

Installation Notes

Installation is performed by machinists or maintenance technicians using an arbor press or similar controlled press equipment. Ensure the receiving bore is clean, free of burrs, and machined to the appropriate press fit tolerance before installation. Do not hammer the plunger directly without a driver to avoid damaging the flange or displacing the ball. Once pressed into position, the plunger is not intended for removal and reinstallation without potential bore damage.