Bridgeport 12550029 Varidisc Spring Assembly Mill

Product Description

The BRIDGEPORT 12550029 is a Varidisc and Spring Assembly designed for use on Bridgeport-type milling machines. This assembly provides the mechanical components needed to maintain proper variable-speed disc engagement and spring tension within the machine's drive system. The kit includes a collar spring, insert, key, and spring, supplying all the core hardware required for a complete service or replacement of the varidisc assembly. At 5 pounds, the assembly is a direct-fit component suited for milling machine maintenance technicians working on drive train repairs.

This assembly is intended for use on Bridgeport-type mills, specifically I Series milling machines. It is a common service part in machine shop environments where variable-speed head mechanisms require periodic rebuilding or spring replacement due to wear, fatigue, or damage. Machinists and machine tool service technicians performing preventive maintenance or corrective repairs on the variable-speed drive will find this kit provides all the essential internal components in a single package.

Key Features

• Complete assembly includes collar spring, insert, key, and spring for full service in one kit
• Designed for Bridgeport-type mill variable-speed drive systems
• Compatible with I Series milling machines
• Direct OEM-style replacement for worn or damaged varidisc spring components
• Sold as a single package unit with no minimum order beyond one unit

Compatibility

Designed for Bridgeport-type mills and I Series milling machines as specified by the manufacturer.

Installation Notes

Installation should be performed by a qualified machine tool technician familiar with variable-speed milling machine drive systems. Always disconnect and lock out electrical power to the machine before disassembling the variable-speed head or accessing the varidisc components. Refer to the machine manufacturer's service documentation for proper assembly sequence and component orientation. Incorrect reassembly of the varidisc and spring components can affect drive engagement and machine performance.