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The PRECISION TWIST DRILL 015007 is a high-speed steel (HSS) jobber-series drill bit designed for drilling into hard surfaces where heat resistance and durability are essential. With a tip diameter of 0.2610 inches and a depth of cut measuring 4 inches, this bit handles demanding applications across metal fabrication, mechanical assembly, and general trade work. The HSS construction allows the cutting edge to retain hardness at elevated temperatures, reducing premature wear when running at standard drill press or hand-drill speeds. Machinists, pipefitters, electricians, and HVAC technicians reach for jobber-series bits as a reliable everyday cutting tool.
This bit suits residential and commercial jobsite applications where consistent hole sizing in ferrous and non-ferrous metals, hard plastics, or composite materials is required. The 4-inch depth of cut and 4-1/8 inch overall length make it practical for through-drilling structural steel, pipe flanges, electrical enclosures, and equipment mounting plates. It is sold individually and fits standard drill chucks that accept a straight shank of the corresponding diameter.
Designed as a general-purpose jobber-series replacement or stock bit for use in any standard drill chuck accepting a straight shank at the corresponding diameter.
Secure the workpiece firmly before drilling to prevent rotation or movement. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and improve hole quality. Wear eye protection and ensure the drill is set to a speed appropriate for the material and bit diameter. Inspect the cutting edge before use and replace the bit if chipping or significant wear is observed.
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