Precision Twist Drill 5998307 Jobber Drill Bit 37/64 in

Product Description

The PRECISION TWIST DRILL 5998307 is a jobber-length drill bit designed for general-purpose drilling in metal and hard materials. The bit measures 37/64 inch (0.5781 inch decimal) in diameter with a 6-5/8 inch overall length and a standard 118-degree point angle. Manufactured from high-speed steel with a bright uncoated finish, it runs a two-flute regular spiral with a web-thinned, tapered web configuration for improved chip evacuation and reduced thrust. The straight-cylindrical shank seats directly into standard drill chucks without adapters. This bit is appropriate for machinists, fabricators, maintenance technicians, and trades personnel requiring a reliable general-purpose cutting tool.

The 5998307 is suited for drilling into steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and other hard materials. The 8xD flute-to-diameter ratio and 4-13/16 inch flute length support moderate drilling depths up to 4.8125 inches without requiring peck cycles in most standard applications. The Series R10P designation places this bit in Precision Twist Drill's general-purpose jobber line, making it a common choice for shop floor, field service, and maintenance drilling tasks where a no-frills HSS bit is specified.

Key Features

• 37/64 inch diameter (0.5781 inch decimal) with a matching straight-cylindrical shank for chuck compatibility
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High-speed steel construction with bright uncoated finish for general-purpose metal cutting
• Two-flute regular spiral design with 4-13/16 inch flute length supports chip clearance during deeper passes
• Right-hand cut direction; compatible with standard drill press, CNC, and hand-drill setups
• Meets ANSI standards; Series R10P-R15P-R18P product line

Compatibility

Designed for general-purpose drilling in steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Workpiece material codes P, M, K, N, and S apply. The straight-cylindrical shank fits any standard drill chuck sized for 37/64 inch or greater capacity.

Installation Notes

Machinists and maintenance technicians should secure the bit fully in a keyed or keyless chuck before operation and verify the workpiece is clamped or fixtured to prevent movement. Power down and de-energize the drill press or CNC spindle before bit changes. Use appropriate cutting fluid or coolant when drilling stainless steel, superalloys, or titanium to manage heat buildup; this bit does not support through-coolant delivery. Dispose of metal chips per site safety procedures and inspect the cutting edges for wear after extended use in hard materials.