Dorian Tool 73310104000 Right Angle Milling Head R8

Product Description

The DORIAN TOOL 73310104000 is a right angle milling head adapter designed for vertical milling machines equipped with an R8 spindle taper. It allows a standard vertical mill spindle to drive a cutting tool at 90 degrees, extending the machine's capability for horizontal milling operations without a full horizontal mill setup. The body is constructed from ductile iron, and the internal drive uses ground spiral bevel gears that are precision hardened for repeatable, low-backlash power transmission. Overall height is 8.25 inches and overall depth is 4.63 inches. Installation is handled by machinists and toolroom technicians as part of a planned machine tooling change.

This adapter fits vertical milling machines with an R8 spindle taper, the standard found on Bridgeport-style knee mills and many similar bench and floor-standing vertical mills common in job shops, toolrooms, and maintenance departments. It is used when a horizontal milling pass, angular slot, or cross-drilling operation is required on workpieces that cannot be repositioned. The unit ships as a single piece and is intended for one adapter per setup. It is not intended for high-speed production environments where dedicated horizontal spindle equipment would be specified.

Key Features

• R8 spindle taper interfaces directly with standard vertical mill drawbar systems
• Ductile iron body provides rigidity and resistance to shock loading during interrupted cuts
• Ground spiral bevel gears deliver smooth, quiet power transfer at the 90-degree angle
• Precision hardened gear components reduce wear and maintain accuracy over service life
• Overall height of 8.25 inches and depth of 4.63 inches fits standard knee mill quill travel envelopes

Compatibility

Designed for use with vertical milling machines equipped with an R8 spindle taper.

Installation Notes

Installation is performed by a machinist or toolroom technician. Power down the milling machine and lock out the main disconnect before mounting or removing the adapter. Insert the R8 shank fully into the spindle and torque the drawbar according to the machine manufacturer's specification. Verify the adapter is seated squarely and all set screws or locking collars are secured before resuming spindle operation.