Collis Tool 73426 Split Sleeve Tapping Driver MT3

Product Description

The COLLIS TOOL 73426 is a split sleeve tapping driver with an MT3 Morse taper shank, designed to hold and drive taps in drill press, milling machine, or vertical machining center applications. The driver accepts a 13/16 inch tap with a tap shank diameter of 0.652 inches and a tap shank square of 0.489 inches. Tap entry depth measures 1-55/64 inches, and the projection is 1/4 inch. This driver is used by machinists and tool-and-die professionals who require accurate, torque-sensitive tapping operations where overload protection is essential.

The 73426 is suited for production and job-shop environments where tapping is performed on vertical spindle machines. The split sleeve design allows the driver to release under excess torque, protecting both the tap and the workpiece from breakage. It is a direct-mount solution for machines equipped with an MT3 taper spindle, eliminating the need for additional adapters in standard setups. This driver is appropriate for threading operations in steel, aluminum, cast iron, and similar materials at controlled feed rates.

Key Features

• MT3 Morse taper shank for direct spindle mounting on compatible machines
• Split sleeve design provides torque overload protection to reduce tap breakage
• Accepts 13/16 inch tap size with 0.652 inch tap shank diameter
• Tap shank square of 0.489 inches for positive drive engagement
• 1-55/64 inch tap entry depth accommodates standard tap geometry
• 1/4 inch projection for close-clearance tapping setups

Compatibility

Designed for use with MT3 Morse taper spindle machines, including drill presses and vertical milling machines equipped with an MT3 taper. Accepts taps with a 13/16 inch tap size and a 0.652 inch shank diameter with a 0.489 inch square drive.

Installation Notes

Installation and removal should be performed by a qualified machinist with the machine powered down and the spindle locked. The MT3 taper shank must be clean and free of burrs before seating in the spindle to ensure proper alignment. Use a proper drift and drift slot to remove the driver from the spindle; never strike the tool body directly. Verify tap shank dimensions match driver specifications before use to prevent slippage or damage.