Collis Tool 71224 Letter U MT1 Morse Taper Drill Driver

Product Description

The COLLIS TOOL 71224 is a Letter U morse taper drill driver designed to mount and drive letter-size drill bits in machine tool spindles with an MT1 outside morse taper interface. It provides a 3/16 inch projection and accepts a drill tang thickness of 0.199 to 0.203 inches, securing the bit firmly during drilling operations. The drill driver transmits rotational force from the spindle to the bit shank, preventing slippage under load. This type of tooling is a standard component in metalworking and machining setups, installed by machinists and tool-and-die professionals working with drill presses, milling machines, and lathes equipped with MT1 spindle sockets.

The 71224 is suited for use with Letter U drill bits, which correspond to a decimal size of 0.368 inches. It is appropriate for production drilling, fixture work, and precision hole-making operations in shops requiring a direct morse taper drive connection. The 1-1/8 inch drill depth rating defines the usable engagement depth for the bit shank within the driver. This driver is a single-piece unit packaged individually and ordered in single-unit quantities.

Key Features

• MT1 outside morse taper shank for direct spindle mounting without a chuck
• Letter U drill size - 0.368 inch decimal equivalent
• 3/16 inch projection length positions the bit accurately relative to the spindle face
• Accepts drill tang thickness of 0.199 to 0.203 inches for secure tang engagement
• 1-1/8 inch drill depth for proper bit shank seating
• Tang-compatible design locks the bit against rotation under cutting loads

Compatibility

Designed as a direct morse taper drill driver for Letter U drill bits with tang shanks in MT1-equipped spindles. Compatible with drill bits confirming a tang thickness of 0.199 to 0.203 inches.

Installation Notes

Installation is performed by machinists or qualified tool room personnel. Power down and lock out the machine before inserting or removing any morse taper tooling. Clean both the spindle bore and the taper shank of the driver before seating to ensure full contact and prevent fretting. Use a drift and knockout bar in the spindle's drift slot to remove the driver - never strike the tooling directly with a hammer.