Collis Tool 73503 MT3 Center Drill Driver 5/16 Inch

Product Description

The COLLIS TOOL 73503 is an MT3 outside Morse taper center drill driver designed to hold and drive center drills in lathe and drilling applications. It accepts a 4 and 14 inch center drill with a 5/16 inch center drill body diameter and features a 1/4 inch projection. The MT3 taper shank seats directly into compatible spindle or tailstock receivers, providing a secure, self-holding connection without the need for a drawbar in typical setups. Machinists and toolroom technicians install this driver when setting up center drilling operations on manual lathes and drill presses.

This driver is suited for use in manual machining environments where MT3 taper spindles are standard. It is typically found in job shop, toolroom, and maintenance machining applications where center drilling is performed before between-center turning or precision hole starting. The 5/16 inch body diameter and 1/4 inch projection dimensions suit standard short and stub center drill sizes used in those operations.

Key Features

• MT3 outside Morse taper shank for direct spindle or tailstock mounting
• Accepts 4 and 14 inch center drills
• 5/16 inch center drill body diameter
• 1/4 inch projection
• Drill tang compatible: No
• Compact and lightweight at 0.44 pounds

Compatibility

Designed for use with MT3 taper spindles in lathes and drill presses. No specific compatible model numbers were provided in the product data. Verify spindle taper size before installation.

Installation Notes

This driver is installed by machinists or toolroom technicians familiar with Morse taper tooling. Power down and lock out the machine before seating or removing any taper tooling from the spindle or tailstock. Clean both the taper shank and the receiver bore thoroughly before seating to ensure full contact and prevent fretting. Remove the driver by using a drift pin through the spindle knockout slot - do not strike the driver body directly.