Precision Twist Drill 5999049 Jobber Drill Bit 39

Product Description

The PRECISION TWIST DRILL 5999049 is a jobber-length drill bit designed for general-purpose drilling in a wide range of metalworking applications. Wire size 39, this bit measures 0.0995 inches in diameter with an overall length of 2.375 inches. The high-speed steel construction resists heat buildup during extended drilling cycles, while the bright uncoated finish provides a consistent surface straight from the factory. A 118-degree standard point angle delivers reliable center starting on flat and curved stock without requiring a pilot hole in most setups. Two spiral flutes with a regular helix and tapered web clear chips efficiently and reduce walking on entry.

This bit is suited for drilling ferrous metals including steel, stainless steel, and cast iron, as well as non-ferrous metals and hard materials including superalloys and titanium. The straight cylindrical shank seats in standard drill chucks without modification, making it a practical choice for bench drill presses, hand drills, and CNC setups running smaller diameter tooling. Maximum drilling depth is 1.375 inches, which matches the full flute length. It is commonly used by machinists, maintenance technicians, and metalworking fabricators working in light industrial and production environments.

Key Features

• Wire size 39, 0.0995 inch diameter with 118-degree standard point angle for accurate entry on metal stock
• High-speed steel construction for heat resistance during sustained drilling cycles
• Bright uncoated finish, no coating buildup to interfere with tight-tolerance hole sizing
• Two regular-helix spiral flutes with tapered web and web-thinned geometry for efficient chip evacuation
• Straight cylindrical shank, 0.0995 inch diameter, compatible with standard drill chucks
• ANSI-standard specification for consistent dimensional accuracy across the R10P-R15P-R18P series

Compatibility

Designed for use across primary workpiece material codes P, M, K, N, and S, covering steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Part of the PRECISION TWIST DRILL R10P-R15P-R18P series.

Installation Notes

Install in a drill chuck and verify the shank is fully seated and the chuck key tightened at all three positions before starting. Power down the drill or CNC spindle completely before changing bits. Use appropriate cutting fluid or coolant at the entry point when drilling stainless steel or hard alloys to extend tool life, noting this bit does not feature coolant-through capability. Dispose of worn or chipped bits promptly to avoid workpiece damage or bit breakage.