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The EAGLE CUTTING TOOL TAC40-020-I is a 5/16-inch high-speed steel (HSS) jobber-length drill bit designed for general-purpose drilling in metal, wood, and plastic. Jobber-length geometry provides the balance of rigidity and reach most commonly required in trade and production drilling applications. HSS construction delivers the hardness needed to cut through ferrous and non-ferrous materials without rapid edge degradation under normal operating conditions. This bit is suited for use in hand drills, drill presses, and CNC drilling setups where a standard jobber-length drill is specified.
The TAC40-020-I fits into routine maintenance, fabrication, and installation workflows across the electrical, HVAC, plumbing, and general mechanical trades. A 5/16-inch diameter is a common size for conduit knockout pilots, fastener clearance holes, and anchor prep in light structural work. It is appropriate for both residential and light commercial job sites where a reliable, general-purpose HSS jobber drill is needed without the overhead of a coated or specialty bit.
Designed as an OEM-style replacement or general-use jobber drill bit for any application requiring a standard 5/16-inch HSS jobber-length drill.
Install the bit securely in a properly sized chuck and tighten before operation. Use appropriate cutting fluid or lubrication when drilling ferrous metals to extend edge life and reduce heat buildup. Wear appropriate eye protection and follow site safety protocols. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.
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