Collis Tool 73028 Morse Taper Drill Driver 3/4 Inch MT3

Product Description

The COLLIS TOOL 73028 is a Morse Taper drill driver designed to hold and drive 3/4 inch twist drills in machine tool spindles fitted with an MT3 outside taper socket. The driver features a 1/4 inch projection and accepts drill tang thicknesses from 7/16 inch to 0.443 inch, securing the drill shank firmly during cutting operations. With a drill depth of 1-5/8 inches, it provides a stable and accurate connection between the spindle and the drill bit. Machinists and toolroom technicians use this type of driver in lathes, drill presses, and milling machines where precise drill retention and positive drive are required.

This drill driver is suited for production and job-shop environments where 3/4 inch drills are run in MT3-equipped spindles. The tang-compatible design locks the drill against rotation, which is critical when drilling at higher feed rates or in harder materials. It is a direct-fit tool for machine spindles already configured for the MT3 Morse Taper standard, eliminating the need for adapter sleeves in most setups.

Key Features

• MT3 outside Morse Taper shank for direct spindle engagement
• Accepts 3/4 inch drill size (0.7500 inch decimal)
• 1/4 inch projection for proper drill seating
• Compatible with drill tang thicknesses from 7/16 inch to 0.443 inch
• 1-5/8 inch drill depth for secure, stable bit retention
• Tang-compatible drive design prevents bit rotation under load

Compatibility

Designed for use with 3/4 inch twist drills that have a compatible tang, installed in machine tool spindles with an MT3 inside Morse Taper socket, such as those found on drill presses, lathes, and milling machines.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. The spindle must be fully stopped and locked out before inserting or removing the driver. Clean both the driver taper and the spindle socket thoroughly before seating to ensure full taper contact and prevent fretting. A proper drift and drift slot should be used to eject the driver from the spindle rather than applying lateral force to the drill.