Precision Twist Drill 5997239 Taper Length Drill Bit 7/64

Product Description

The PRECISION TWIST DRILL 5997239 is a taper length drill bit in the QC91P series, designed for professionals who need reach beyond what a jobber-length bit provides. Built from high speed steel with a bright uncoated finish, this bit features a 135-degree split point that reduces walking on entry and lowers thrust required to start the cut. The parabolic flute geometry promotes rapid chip evacuation, making it well-suited for deeper holes in a wide range of materials. It cuts right-hand and mounts on a straight shank for compatibility with standard drill chucks. At 0.110 inches (No. 35 wire gauge, 7/64 inch), it covers a common pilot and clearance hole size used across fabrication and maintenance work.

This bit is intended for use in metalworking, fabrication, and maintenance applications where a longer flute length is needed to reach deep features or drill through thick stock. The QC91P series targets heavy-duty use and is appropriate for machine-fed or hand-held drilling. It is suited for machinists, millwrights, pipefitters, and maintenance technicians working in shops, plants, or field environments where a variety of metals are encountered regularly.

Key Features

• 135-degree split point reduces walking and lowers entry thrust on hard and tough materials
• Parabolic flute design accelerates chip removal to prevent packing in deep holes
• High speed steel construction handles the heat and wear of continuous metal drilling
• Taper length body extends reach compared to standard jobber-length bits
• Web-thinned, tapered web configuration keeps the cutting edge geometry efficient through the full flute length
• Bright uncoated finish allows easy visual inspection of the cutting edge condition

Compatibility

The 5997239 is rated for use in alloy steel, aluminum, aluminum alloy, brass, bronze, carbon steel, cast iron, copper, graphite, hardened steel, magnesium, magnesium alloy, malleable iron, nickel, stainless steel, steel, tempered steel, titanium, and titanium alloy. It fits any standard drill chuck or collet accepting a straight shank at 7/64 inch diameter.

Installation Notes

Installation is performed by machinists or maintenance technicians using a drill press, milling machine, or hand-held power drill with a compatible chuck. Secure the shank fully in the chuck before applying power and confirm the workpiece is clamped or fixtured to prevent movement. Use appropriate cutting fluid or coolant for the material being drilled to extend tool life, noting that this bit does not support through-coolant delivery. Inspect the split point for chipping or wear before each use and recondition or replace the bit if the cutting edges are degraded.