Bridgeport 12180099 Hi-low Shift Crank 2j-head Milling

Product Description

The BRIDGEPORT 12180099 is a Hi-Low Shift Crank designed as a direct replacement accessory for Bridgeport milling machines equipped with the 2J-Head Back Gear assembly. This crank interfaces with the back gear mechanism to allow the operator to shift between high and low spindle speed ranges. It is a mechanical hardware component handled during routine maintenance or repair by machinist-level technicians and industrial maintenance personnel. At 0.5 pounds, it is a compact, single-piece part that ships in a package quantity of one.

This shift crank is intended for use with Bridgeport I Series milling machines fitted with the 2J-Head Back Gear configuration. It is a common service part in job shops, vocational machine shops, and industrial facilities where Bridgeport knee mills are in regular production use. Technicians sourcing this part are typically restoring crank function after wear, breakage, or loss of the original hardware.

Key Features

• Direct-fit Hi-Low shift crank for 2J-Head Back Gear assemblies
• Compatible with Bridgeport I Series milling machines
• Lightweight at 0.5 pounds for easy single-hand installation
• Sold as a single-piece unit, matching OEM package quantity
• UNSPSC Code 23242100 — classified as machining center accessory hardware

Compatibility

Designed for use with Bridgeport I Series milling machines equipped with the 2J-Head Back Gear assembly, as specified by the manufacturer.

Installation Notes

Installation of this shift crank should be performed by a qualified machinist or industrial maintenance technician familiar with Bridgeport knee mill back gear assemblies. De-energize and lock out the milling machine at the main disconnect before beginning any mechanical work on the head assembly. Consult the machine's original service documentation for proper fitment and fastener engagement procedures. Do not operate the spindle until the crank is fully seated and secured.