Dorian Tool 73310104090 Milling Machine Drawbar 7/16-20

Product Description

The DORIAN TOOL 73310104090 is a milling machine drawbar designed to secure toolholders in the spindle of a vertical milling machine. It features a 7/16-20 thread size, an overall length of 26.5 inches, and an 8.5-inch hex length that allows a wrench to engage the bar for tightening and loosening. The 1.75-inch thread length provides sufficient engagement for reliable toolholder retention during cutting operations. Machinists and tool room technicians install this part as a direct replacement or spare on compatible knee-type and bed-type milling machines.

This drawbar is suited for use on vertical milling machines in job shop, maintenance, and production environments. It is compatible with Bridgeport and Kondia milling machines, making it a practical replacement component for shops running that equipment. The bar length of 18 inches gives the shaft the reach needed to pass through the spindle housing and engage the toolholder below.

Key Features

• 7/16-20 thread size for secure toolholder engagement
• 26.5-inch overall length fits through full spindle stack on compatible machines
• 8.5-inch hex length provides wrench access for torquing and releasing toolholders
• 1.75-inch thread length ensures adequate thread engagement with toolholder
• 18-inch bar length spans the spindle housing depth on supported machines
• Weighs 2 pounds for easy single-technician handling

Compatibility

Compatible with Bridgeport and Kondia milling machines as stated by the manufacturer.

Installation Notes

Installation and removal of a milling machine drawbar should be performed by a qualified machinist or maintenance technician. Power down and lock out the machine before accessing the spindle. Use an appropriately sized wrench on the hex section to tighten or break loose the drawbar. Do not use an impact wrench to tighten the drawbar, as overtightening can damage the spindle or toolholder taper.