Precision Twist Drill 5997899 Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997899 is a taper length drill bit designed for heavy-duty drilling across a wide range of metals and alloys. Built from high speed steel with a bright/uncoated finish, this bit features a 135-degree split point for self-centering entry without a center punch. The parabolic flute geometry promotes efficient chip evacuation and reduced heat buildup. At 4 inches overall length with a 3-5/64 inch flute length and a 0.1575 inch (4.00 mm) straight shank, it fits standard drill chucks and is well suited to both production and maintenance drilling environments.

This drill bit is appropriate for use in machine shops, fabrication facilities, and maintenance departments where precision hole-making in metal is required. The QC91PM series targets applications in alloy steel, carbon steel, stainless steel, cast iron, aluminum, brass, bronze, copper, titanium, magnesium, nickel, hardened steel, tempered steel, and related alloys. The 6xD flute-to-diameter ratio and tapered web configuration make it a practical choice for drilling deeper holes without sacrificing chip clearance or rigidity.

Key Features

• 135-degree split point enables self-centering entry and reduces walking on hard surfaces
• Parabolic flute geometry improves chip evacuation in deep-hole drilling
• High speed steel construction provides wear resistance across a broad range of metals
• Web-thinned, tapered web configuration lowers thrust requirements
• Straight shank at 0.1575 inch (4.00 mm) diameter fits standard drill chucks
• Conforms to DIN 340 specification for taper length drills

Compatibility

Designed as a taper length replacement or production drill for use with standard straight-shank drill chucks; compatible with the material types listed in the Series QC91PM specification including alloy steel, aluminum, brass, bronze, carbon steel, cast iron, copper, graphite, hardened steel, magnesium, malleable iron, nickel, stainless steel, tempered steel, and titanium alloys.

Installation Notes

Installation is performed by machinists or maintenance technicians using any drill press, CNC machining center, or hand drill with a compatible straight-shank chuck. Ensure the spindle is fully stopped before loading or removing the bit. Use appropriate cutting fluid for the workpiece material to extend bit life and maintain hole quality. Follow applicable shop safety standards and machine guarding requirements during operation.