Vlier PFP59 Press Fit Spring Plunger Steel 0.5in Body

Product Description

The VLIER PFP59 is a press fit spring plunger designed for light end force positioning and indexing applications in precision assemblies. Constructed entirely of steel, this plunger features a 0.5-inch body diameter and a 1.1-inch body length, with a flanged design that seats securely into a bored hole without threading. The spring delivers an initial end force of 4 pounds ramping to a final end force of 9 pounds, making it suitable for light-duty detent, latch, and alignment functions in jigs, fixtures, machine components, and industrial assemblies. Machinists, toolmakers, and mechanical assembly technicians are the primary installers of this component.

The PFP59 is intended for use in light end force applications where a press-in installation is preferred over a threaded body. The flanged design with an 11/16-inch flange diameter provides a positive stop against the host material surface, controlling the installed depth precisely. Typical applications include fixture plates, workholding devices, machine tool components, and any assembly requiring repeatable spring-loaded positioning without a threaded bore.

Key Features

• Press fit installation - no threading required, seats directly into a bored hole
• Steel body and steel nose for durability in industrial environments
• Flanged body with 0.688-inch flange diameter provides a controlled seating stop
• Spring force range: 4 pounds initial to 9 pounds final end force
• 0.332-inch plunger diameter with 0.25-inch plunger projection
• No locking element - straightforward spring plunger design

Compatibility

Designed as a standard press fit spring plunger for light end force applications in precision fixtures, tooling plates, and mechanical assemblies that accept a 0.5-inch diameter press fit bore.

Installation Notes

Installation is performed by pressing the plunger body into a precision-bored hole sized to the 0.5-inch body diameter using a press or suitable hand tool. Ensure the bore is clean and dimensionally correct before pressing to avoid damage to the plunger body or host material. The flange seats flush against the surface to establish installed depth. Removal typically requires a punch or press applied from the plunger end - do not pry against the flange.