Precision Twist Drill 5997432 7/16 Inch Taper Length Drill Bit

Product Description

The PRECISION TWIST DRILL 5997432 is a 7/16 inch (0.4375 inches) taper length drill bit engineered for heavy-duty drilling in a wide range of metals and alloys. Built from high speed steel (HSS) with a bright/uncoated finish, it features a 135-degree split point that self-centers on contact, reducing walking and the need for a center punch. The parabolic flute geometry, rated at a 6xD flute-to-diameter ratio, clears chips aggressively and runs cooler under load. Right-hand cut with a straight shank, this bit is sized for use with standard drill chucks. It is part of the QC91P series and is graded heavy-duty for demanding production and maintenance applications.

This bit suits professionals who regularly drill through tough materials including alloy steel, stainless steel, hardened steel, tempered steel, cast iron, malleable iron, titanium, titanium alloy, nickel, copper, brass, bronze, aluminum, aluminum alloy, magnesium, magnesium alloy, graphite, and carbon steel. With a flute length of 4-5/8 inches and an overall length of 7-1/4 inches, it reaches deeper than a jobber-length bit, making it well suited for structural work, fabrication shops, and maintenance environments where clearance is limited or hole depth exceeds standard reach. Licensed machinists, ironworkers, pipefitters, and maintenance mechanics are the typical users.

Key Features

• 135-degree split point self-centers for accurate starts without a center punch
• Parabolic flute design at 6xD ratio promotes fast chip evacuation and reduced heat buildup
• High speed steel construction handles a broad range of ferrous and non-ferrous materials
• Taper length body (7-1/4 inches overall, 4-5/8 inch flute) provides extra reach versus jobber-length bits
• Web-thinned, tapered web configuration reduces thrust and improves cutting efficiency
• Bright/uncoated finish allows easy visual inspection for wear or damage
• Meets ANSI standards for dimensional accuracy and interchangeability

Compatibility

Designed as a general-purpose taper length drill bit compatible with standard straight-shank drill chucks accepting a 0.4375 inch shank. Suitable for use in drill presses, magnetic drills, and hand-held power drills capable of accommodating the shank diameter.

Installation Notes

Installation of this bit is performed by machinists, fabricators, and maintenance mechanics using a drill press or compatible hand-held power tool. Secure the straight shank firmly in a keyed or keyless chuck before operation and verify the bit runs true before drilling. Always wear appropriate eye protection and use cutting fluid or coolant when drilling hardened or stainless steel to extend tool life, even though this bit does not have a through-coolant channel. Disconnect or de-energize the drill before changing bits.