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The PRECISION TWIST DRILL 5010721 is a high-speed steel (HSS) chucking reamer with a straight flute design, built for precision hole-finishing in metal fabrication and machining applications. The reamer measures 15/16 inches in diameter with an overall length of 10 inches, making it suited for through-hole and blind-hole finishing where tight tolerances are required. HSS construction provides the hardness and wear resistance needed to size and smooth bored or drilled holes to accurate dimensions. This tool is sold individually and is intended for use by machinists, tool-and-die technicians, and trade professionals working with drill presses, lathes, or CNC equipment.
The 5010721 chucking reamer is designed for use in machine-tool setups where the reamer is driven by a chuck rather than by hand. The straight flute geometry makes it well-suited for reaming non-interrupted, through holes in ferrous and non-ferrous materials. Typical applications include production machining, maintenance repair operations, and precision fitting of shafts, pins, and fasteners where hole diameter and surface finish are critical.
Designed as a machine-driven chucking reamer compatible with standard drill press, lathe, and CNC tool chucks that accept a straight or Morse taper shank in the appropriate size range.
Installation and use of this reamer should be performed by a qualified machinist or tooling technician. Always power down and lock out the machine before inserting or removing the reamer from the chuck. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Ensure the workpiece is securely fixtured before beginning the reaming operation to prevent tool deflection and maintain dimensional accuracy.
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