Bridgeport 12190086 Reverse Trip Plunger Up Mill Part

Product Description

The BRIDGEPORT 12190086 is a reverse trip plunger (up) designed as a replacement mechanical component for Bridgeport-style milling machines. This plunger is part of the quill feed trip mechanism, which controls automatic downfeed disengagement and directional travel limits on the milling head. Weighing 1 pound, it is a compact hardware component installed during routine maintenance or repair of the quill feed assembly. Machinists, machine tool technicians, and maintenance mechanics working on vertical knee mills will encounter this part during servicing of the feed engagement system.

This part is suited for vertical milling machine applications where the quill feed trip mechanism requires rebuild or replacement. It is typically installed when the reverse trip function fails to engage or disengage properly during up-travel operation. The 12190086 is packaged as a single unit and is intended as a direct replacement component for the quill feed trip assembly on compatible Bridgeport-style mills.

Key Features

• Controls the reverse trip function for upward quill travel on vertical milling machines
• Single-unit packaging suitable for targeted component-level repair
• Lightweight construction at 1 pound for easy handling during installation
• OEM-style replacement for quill feed trip mechanism service

Compatibility

Designed as an OEM-style replacement component for Bridgeport-style vertical knee milling machines equipped with a quill feed trip mechanism.

Installation Notes

Installation should be performed by a qualified machine tool technician or maintenance mechanic familiar with vertical milling machine quill feed assemblies. Power down and lock out the machine at the main disconnect before disassembling any quill feed components. Consult the machine's service manual for proper disassembly sequence and reassembly procedures for the trip plunger mechanism. Do not force the plunger into position; verify alignment with the trip collar before securing the assembly.