Bridgeport 12190108 Quill Pinion Milling Machine

Product Description

The BRIDGEPORT 12190108 is a quill pinion replacement part designed for use in BRIDGEPORT milling machines. The quill pinion is a critical gear component within the quill feed assembly, translating rotational input from the quill feed handle into vertical quill travel. This part is machined to OEM specifications and is installed by machinists and millwrights performing maintenance or rebuilding the quill housing assembly on affected machine heads. It is a direct-fit replacement intended to restore proper quill operation in worn or damaged assemblies.

This quill pinion is designed for use with I Series BRIDGEPORT milling machines. It is compatible with the 2J and J-Head lower housing configurations. Typical installation occurs during quill assembly service, gear wear replacement, or full head rebuilds on vertical knee mills used in job shops, maintenance facilities, and light manufacturing environments. Technicians performing scheduled maintenance or addressing excessive quill backlash will find this part appropriate for restoring factory-spec quill movement.

Key Features

• Direct replacement quill pinion for BRIDGEPORT I Series milling machines
• Compatible with 2J and J-Head lower housing configurations
• Designed to restore proper quill feed engagement and vertical travel
• OEM-style fitment for accurate drop-in installation during head service
• Sold individually as a single unit

Compatibility

Designed for use with BRIDGEPORT I Series milling machines equipped with 2J and J-Head lower housing configurations.

Installation Notes

Installation of this quill pinion should be performed by a qualified machinist or millwright. Before beginning service, power down the machine completely and lock out the main disconnect in accordance with applicable LOTO procedures. Disassembly of the quill housing is required to access and replace the pinion gear. Do not force or impact the pinion during installation, as this may damage the gear teeth or housing bore.