Bridgeport 12193478 Hub Assembly Spindle Pulley

Product Description

The BRIDGEPORT 12193478 is a hub assembly spindle pulley designed as a direct replacement component for Bridgeport-type milling machines. The spindle pulley hub assembly is a core drive-train component that transfers rotational power from the motor to the spindle, enabling controlled cutting speeds across milling operations. This part is installed by machinists and millwright technicians performing preventive maintenance or corrective repairs on vertical milling equipment. Its OEM-style fit reduces downtime and ensures proper belt alignment and spindle performance.

This hub assembly is suited for use on Bridgeport-type vertical knee mills commonly found in machine shops, maintenance facilities, and light manufacturing environments. It is applicable to standard Bridgeport-style mill configurations where the spindle drive system requires pulley or hub replacement due to wear, damage, or scheduled overhaul. Installers working on Bridgeport-type machines will find this part a direct-fit solution for restoring drive system integrity.

Key Features

• OEM-style hub assembly designed for Bridgeport-type mill spindle drive systems
• Restores proper belt alignment and rotational power transfer to the spindle
• Direct replacement fit reduces installation time during service or overhaul
• Single-unit packaging supports individual machine repair needs

Compatibility

Designed as an OEM-style replacement for Bridgeport-type vertical milling machines.

Installation Notes

Installation should be performed by a qualified millwright or machinist familiar with vertical knee mill drive systems. Disconnect and lock out all electrical power to the machine before disassembling the spindle drive housing. Ensure proper belt tension and pulley alignment are verified after installation before returning the machine to service. Refer to the machine manufacturer's service documentation for assembly sequence and fastener specifications.