Precision Twist Drill 5999177 Jobber Drill Bit No. 42

Product Description

The PRECISION TWIST DRILL 5999177 is a jobber-length drill bit designed for general-purpose drilling in metal and hard materials. It is a No. 42 wire-gauge bit with a 3/32-inch (0.0935-inch decimal) diameter, ground to a 135-degree split-point angle for fast engagement and reduced walking on hard surfaces. The bit is manufactured from high-speed steel with a steam oxide coating that provides lubricity and mild corrosion resistance. At 2.25 inches overall length with a 1.25-inch flute, it fits standard drill chucks and is sized for production and maintenance drilling tasks performed by machinists, tool-and-die workers, and maintenance technicians.

This bit is suited for drilling steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium. Its regular spiral, two-flute geometry and tapered web with web thinning support efficient chip evacuation in both hand-held and machine-mounted applications. The straight cylindrical shank seats cleanly in keyless or keyed drill chucks on bench-top drill presses, CNC machines, and hand drills. It carries ANSI and NAS 907 specification compliance, making it appropriate for aerospace and heavy industrial work.

Key Features

• No. 42 wire-gauge size, 0.0935-inch decimal diameter, 3/32-inch fractional equivalent
• 135-degree split-point angle reduces thrust and minimizes bit walking on hard surfaces
• High-speed steel construction with steam oxide coating for lubricity and mild corrosion resistance
• Two-flute regular spiral with tapered, web-thinned web for efficient chip evacuation
• Right-hand cut with straight cylindrical shank fits standard drill chucks without modification
• Meets ANSI and NAS 907 specifications; rated for steel, stainless steel, cast iron, non-ferrous metals, superalloys, and titanium

Compatibility

Designed as a general-purpose replacement or production-run jobber-length drill bit conforming to ANSI and NAS 907 standards, suitable for use in standard drill chucks accepting a 3/32-inch straight cylindrical shank across bench-top, CNC, and handheld drilling applications.

Installation Notes

Installation is performed by machinists or maintenance technicians. Secure the shank fully in the chuck and confirm runout before drilling. Power down or de-energize any machine tool before changing bits. Do not exceed the rated speed range for the workpiece material, and use appropriate cutting fluid when drilling stainless steel, superalloys, or titanium to prevent work hardening and premature bit wear.