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The EAGLE CUTTING TOOL TAC40-221-I is a U-size high-speed steel (HSS) jobber-length drill bit sourced as an import-grade cutting tool. Jobber drills are the standard general-purpose drill length used across metalworking, fabrication, and maintenance trades. The U-size designation refers to a specific letter-series wire gauge diameter used when precise hole sizing is required for tapping, reaming, or close-tolerance drilling. HSS construction provides the hardness and heat resistance needed for drilling mild steel, aluminum, brass, and similar materials at typical shop speeds.
This drill bit is suited for general-purpose hole-making in light industrial, maintenance, and production environments. Letter-series drills like this U-size bit are commonly used by machinists, pipefitters, electricians, and maintenance technicians when a specific hole diameter outside the standard fractional or metric range is needed. The jobber length provides a practical balance between reach and rigidity for bench drill press and hand drill use.
Designed as a general-purpose jobber-length drill bit compatible with standard 3-jaw drill chucks on bench drill presses, hand drills, and drill motors that accept letter-series shank diameters.
Drill bits should be installed by a qualified machinist or trades professional familiar with cutting tool operation. Secure the bit firmly in the chuck and verify the work piece is properly clamped before operation. Always use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life and improve hole quality. Inspect the cutting edges before each use and replace worn or damaged bits to maintain safe and accurate drilling.
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