Collis Tool 70308 Standard Tapping Driver MT3 Taper Shank

Product Description

The COLLIS TOOL 70308 is a standard tapping driver designed for use with MT3 taper shank spindles on drill presses, milling machines, and similar machine tools. It accepts a 5/8 inch tap and provides a tap entry depth of 1.44 inches, making it suitable for a range of through-hole and blind-hole tapping operations. The driver features a 2-5/16 inch projection and a tap shank diameter of 0.48 inches. A tap shank square of 0.36 inches ensures positive drive engagement. This tool is used by machinists and tool-and-die professionals who need reliable tapping performance from a machine spindle.

This tapping driver is suited for machine tapping applications in job shops, maintenance facilities, and manufacturing environments where MT3 taper shank tooling is standard. It is appropriate for both production runs and one-off tapping operations on metal workpieces. The 5/8 inch tap capacity accommodates common tap sizes used in general metalworking. The driver connects directly to any MT3 taper spindle without adapters, reducing setup time and maintaining concentricity during tapping.

Key Features

• MT3 taper shank for direct mounting to compatible machine spindles
• 5/8 inch tap capacity for common metalworking tap sizes
• 1.44 inch tap entry depth for through-hole and blind-hole tapping
• 2-5/16 inch projection from spindle face to tap chuck centerline
• 0.36 inch tap shank square ensures positive rotational drive engagement
• Compact package quantity of one unit per order

Compatibility

Designed as a direct-mount tapping driver for machine tools equipped with an MT3 taper spindle, including drill presses and milling machines that accept Morse Taper No. 3 tooling.

Installation Notes

Installation is performed by a machinist or toolroom technician. Power down and lock out the machine spindle before seating or removing the taper shank. Clean the MT3 taper socket and the shank mating surface before insertion to ensure full contact and accurate seating. Verify that the tap shank square is fully engaged in the driver socket before beginning any tapping cycle.