Precision Twist Drill 5999280 Jobber Drill Bit Wire 91

Product Description

The PRECISION TWIST DRILL 5999280 is a wire gauge size 91 jobber length drill bit machined from high speed steel with a bright uncoated finish. It measures 0.75 inches overall length and carries a 118-degree standard point angle for reliable centering on entry. The two-flute spiral design with a tapered, web-thinned configuration evacuates chips efficiently during drilling and reduces walking on harder workpiece surfaces. The straight-cylindrical shank seats securely in standard drill chucks without additional tooling. This bit is sized for precision small-diameter work and is suited to technicians, machinists, and trade professionals who require consistent hole quality at the 0.0083-inch diameter range.

This drill bit is designed for drilling operations in a broad range of workpiece materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. It is a general-purpose tool appropriate for bench drill presses, hand drills, and CNC drill operations where a wire gauge 91 hole diameter is required. The 5/64-inch flute length and 43/64-inch shank length make it best suited for shallow-depth drilling applications where maximum drilling depth does not exceed 0.0781 inches. Packaging quantity is one bit per unit.

Key Features

• Wire gauge size 91 at 0.0083 inches diameter for precision small-hole work
• 118-degree standard point angle for accurate entry and reduced walking
• High speed steel construction handles steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium
• Two-flute regular spiral design promotes chip evacuation during drilling
• Web-thinned, tapered web configuration reduces thrust force at the cutting tip
• Bright uncoated finish compatible with cutting fluids and coolant application as needed
• ANSI standard compliance for consistent dimensional accuracy

Compatibility

Part of the R10P-R15P-R18P series from PRECISION TWIST DRILL. Designed as a general-purpose jobber length drill bit for use in any standard drill chuck or collet accepting a 0.0083-inch straight-cylindrical shank. Suitable for drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces per workpiece material codes P, M, K, N, and S.

Installation Notes

Installation is performed by machinists or trade professionals using a compatible drill press, hand drill, or CNC spindle. Confirm the chuck or collet is clean and free of debris before seating the straight-cylindrical shank to prevent runout. At this diameter, low feed pressure and appropriate cutting fluid or lubrication are strongly recommended to extend tool life and prevent bit breakage. Inspect the cutting point before each use at this wire gauge size, as small-diameter high speed steel bits are susceptible to chipping if run dry or at excessive feed rates.