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The PRECISION TWIST DRILL 010319 is a heavy-duty HSS cobalt straight-shank jobber drill designed for cutting through hard and abrasive materials. With a 19/64 inch tip diameter and a 4 inch depth of cut, this type J jobber drill delivers the rigidity and heat resistance needed for demanding metalworking applications. The overall length is 4-3/8 inches. High-speed steel cobalt construction maintains cutting edge hardness at elevated temperatures, making it a dependable choice for production drilling in ferrous metals, stainless steel, and similarly tough workpiece materials. Licensed tradespeople and machining professionals are the primary installers and operators.
This drill is suited for use in machine shops, maintenance facilities, and fabrication environments where hard-surface drilling is routine. The straight shank design is compatible with standard three-jaw chucks on drill presses, lathes, and hand-held power drills. It is well-suited for repetitive-cycle applications in both residential mechanical work and light industrial or commercial settings where cobalt-grade tooling is specified for material hardness or tool longevity requirements.
Designed as a straight-shank jobber drill compatible with any standard three-jaw chuck that accepts a 19/64 inch shank diameter, including drill presses, mills, lathes, and hand-held power drills used in metalworking and fabrication applications.
This drill bit is installed and operated by machinists, maintenance technicians, and trade professionals performing metal drilling tasks. Secure the straight shank firmly in the chuck before operation and confirm the workpiece is properly clamped or fixtured. Use appropriate cutting fluid or coolant when drilling ferrous or stainless materials to extend tool life and reduce heat buildup. Wear appropriate personal protective equipment including eye protection whenever operating rotary cutting tools.
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