Bridgeport 11181794 Locknut Bearing 2j-head Milling Machine

Product Description

The BRIDGEPORT 11181794 is a special locknut bearing designed for use in milling machine assemblies. This hardened fastening component secures bearing positions within the spindle and gear train, maintaining precise axial positioning under the rotational loads typical of a milling head. It is a direct OEM-style replacement part intended for use by qualified machine tool technicians and maintenance professionals servicing BRIDGEPORT milling equipment. Proper bearing retention is critical to spindle accuracy, and this locknut is engineered to meet the original assembly specifications for the applications listed below.

This locknut bearing is specifically designed for the 2J-Head Back Gear assembly on I Series BRIDGEPORT milling machines. It fits into the back gear section of the 2J-Head, which controls spindle speed range selection. This part is typically replaced during back gear overhauls, spindle rebuilds, or when bearing play or spindle runout is traced to a worn or damaged locknut. Maintenance technicians working on BRIDGEPORT I Series mills will encounter this component during any disassembly of the back gear train.

Key Features

• OEM BRIDGEPORT replacement part for the 2J-Head Back Gear assembly
• Designed specifically for I Series milling machines
• Secures bearing axial position within the spindle and gear train
• Direct fitment replacement — no modification required for listed applications
• Sold individually (package quantity of 1)

Compatibility

Designed for use with BRIDGEPORT I Series milling machines equipped with the 2J-Head Back Gear assembly.

Installation Notes

Installation should be performed by a qualified machine tool technician or mechanical maintenance professional. Disconnect and lock out all electrical power to the milling machine before disassembling any spindle or gear train components. A bearing locknut spanner wrench of the appropriate size is typically required for removal and installation. Avoid applying impact force directly to the locknut during assembly, as this may damage the bearing seat or thread engagement.