Bridgeport 11550003 Adjustable Spring Collar Milling Machine

Product Description

The BRIDGEPORT 11550003 is an adjustable spring collar designed as a direct replacement or service part for Bridgeport milling machines. This collar fits within the 2J-Head top housing assembly, where it provides the retention and preload function required to maintain proper spindle and quill operation. Installation is performed during head disassembly or rebuild service. The part ships as a single-piece unit and is sourced as a genuine Bridgeport component for accurate fit and function.

This adjustable spring collar is used in the top housing of the 2J-Head on I Series Bridgeport milling machines. It is a common service part encountered during spindle rebuilds, quill spring replacements, and top housing overhauls. Machine shops and industrial maintenance technicians performing scheduled maintenance or corrective repair on vertical knee mills will encounter this part during head disassembly.

Key Features

• Adjustable spring collar design for precise fitment within the 2J-Head top housing
• Directly compatible with I Series Bridgeport milling machine head assemblies
• Single-piece unit packaged individually for service and repair use
• OEM Bridgeport part number ensures accurate replacement

Compatibility

Designed for use with I Series Bridgeport milling machines equipped with the 2J-Head top housing assembly.

Installation Notes

Installation of this spring collar is performed by qualified machine tool technicians or industrial maintenance personnel during head disassembly. Power down and lock out the machine at the main disconnect before beginning any head or spindle service. Standard machine tool hand tools are required for head removal and collar seating. Follow the applicable Bridgeport service documentation for correct assembly sequence and spring preload adjustment.