Collis Tool 73420 Split Sleeve Tapping Driver MT3

Product Description

The COLLIS TOOL 73420 is a split sleeve tapping driver designed for use with a 1/2 inch tap on MT3 taper shank machines. It accepts taps with a shank diameter of 0.367 inches and a tap shank square of 0.275 inches, providing a secure, positive drive during tapping operations. The driver features a 1/4 inch projection and a tap entry depth of 1-3/32 inches, making it suitable for standard production tapping setups on drill presses and milling machines equipped with a Morse Taper No. 3 spindle. Machinists and toolroom technicians install this driver to maintain consistent tap alignment and protect taps from breakage under torque.

This tapping driver fits production and job-shop environments where MT3 spindle machines are used for repetitive or precision tapping. It is appropriate for use on ferrous and non-ferrous materials where a 1/2 inch tap is required. The split sleeve design allows the driver to release under excessive torque, helping to prevent tap breakage. Typical applications include drilling and tapping operations in manufacturing, maintenance, and repair facilities where repeatability and tap protection are priorities.

Key Features

• MT3 taper shank mounts directly into Morse Taper No. 3 spindles without an adapter
• Split sleeve design releases under excessive torque to reduce tap breakage risk
• Accepts 1/2 inch taps with 0.367 inch shank diameter
• Tap shank square of 0.275 inches for positive rotational drive
• 1-3/32 inch tap entry depth accommodates standard 1/2 inch tap geometry
• 1/4 inch projection positions the tap correctly relative to the spindle face

Compatibility

Designed for use with 1/2 inch taps having a 0.367 inch shank diameter and a 0.275 inch shank square, installed in machine tool spindles with a Morse Taper No. 3 (MT3) socket.

Installation Notes

Installation is performed by machinists or toolroom technicians. Power down and lock out the machine spindle before seating or removing the taper shank driver. Clean the MT3 taper bore and driver shank thoroughly before insertion to ensure full contact and prevent fretting. Do not use the driver with taps that exceed the specified shank diameter or square size, as improper fit will reduce drive engagement and may cause tap damage.