Collis Tool 73423 Split Sleeve Tapping Driver MT3

Product Description

The COLLIS TOOL 73423 is a split sleeve tapping driver designed for use with MT3 taper shank spindles on drill presses and milling machines. It accepts an 11/16 inch tap and provides a tap entry depth of 1-9/16 inches, making it suitable for through-hole and blind-hole tapping operations where controlled depth and torque relief are required. The split sleeve design allows the driver to release and reset when the tap meets resistance, protecting both the tap and the workpiece. Licensed machinists and toolroom technicians are the primary users of this driver in production and maintenance environments.

This tapping driver fits into MT3 taper shank tool holders and is used in metalworking applications on drill presses, knee mills, and similar machine tools. The 1/4 inch projection and a tap shank diameter of 0.542 inches make it compatible with standard tapping chuck setups. It is suited for repetitive tapping operations in manufacturing, fabrication, and repair environments where consistent thread quality is needed across steel, aluminum, and other machinable materials.

Key Features

• Split sleeve mechanism releases under overload to protect tap and workpiece
• MT3 taper shank for direct mounting in compatible spindles
• Accepts 11/16 inch tap size
• Tap entry depth of 1-9/16 inches for through and blind hole applications
• Tap shank diameter of 0.542 inches with 0.406 inch tap shank square for positive drive
• 1/4 inch projection for close-clearance tapping setups

Compatibility

Designed as an OEM-style replacement and standard fitment for MT3 taper shank tapping chuck applications on drill presses and milling machines requiring an 11/16 inch tap driver.

Installation Notes

Installation should be performed by a qualified machinist familiar with taper shank tooling. Power down and lock out the machine spindle before seating or removing the MT3 taper shank. Clean the taper bore and shank with a lint-free cloth before insertion to ensure full contact and prevent fretting. Do not use a hammer directly on the driver body; use a proper draw bar or drift to seat and eject the taper.