Precision Twist Drill 5995539 No 7 Hss Jobber Drill Bit

Product Description

The PRECISION TWIST DRILL 5995539 is a Number 7 wire-size jobber length drill bit designed for general-purpose drilling in a wide range of metalworking applications. Built from high speed steel with a bronze coating, it features a 135-degree split point that reduces walking and allows faster penetration without a center punch. The two-flute spiral design with a web-thinned, tapered web configuration promotes efficient chip evacuation. At 3.625 inches overall length with a 2.4375-inch flute length, this bit is suited for standard bench drill presses, drill motors, and CNC drilling operations handled by machinists and maintenance technicians.

This drill bit is rated for use in steel, stainless steel, cast iron, superalloys, and titanium — covering a broad range of ferrous and hard-alloy workpieces common in fabrication, maintenance, and production environments. The straight-cylindrical shank fits standard three-jaw chucks without modification. Its 12xD flute-to-diameter ratio provides adequate chip clearance for hole depths up to 2.4375 inches, making it a reliable choice for through-holes and blind holes in typical plate and structural stock thicknesses. Sold individually.

Key Features

• Number 7 wire size, 0.2010 inches decimal diameter — exact fit for close-tolerance holes
• 135-degree standard split point reduces thrust and minimizes bit walking on hard surfaces
• High speed steel construction with bronze coating for corrosion resistance and reduced friction
• Web-thinned, tapered web improves chip flow and lowers cutting force
• Straight-cylindrical shank fits standard drill chucks without adapters
• ANSI-conforming Series HX18 — built to recognized dimensional standards

Compatibility

Designed as an OEM-style jobber length drill bit compatible with standard three-jaw drill chucks accepting a 0.2010-inch straight shank. Rated for drilling steel, stainless steel, cast iron, superalloys, and titanium per Series HX10-HX15-HX18 application guidelines.

Installation Notes

Secure the straight-cylindrical shank fully into the drill chuck and verify concentricity before operation. Always power down the drill press or disconnect the drill motor before changing bits. Use appropriate cutting fluid or coolant when drilling stainless steel, cast iron, or titanium to extend tool life; note that this bit does not support coolant-through delivery. Follow shop safety practices and applicable ANSI standards for drilling operations.