Precision Twist Drill 5999440 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999440 is a screw machine length drill bit designed for high-performance metal drilling applications. It measures 0.1875 inches (3/16 inch) in diameter with an overall length of 2-3/16 inches and a flute length of 1-1/8 inches. Built from coated high speed steel, this bit features a 135-degree split point that reduces walking on entry and lowers thrust force during drilling. The right-hand spiral flute and web-thinned, tapered web construction improve chip evacuation and cutting efficiency. It is sold individually but requires a minimum order of 12 units. Licensed tradespeople and machinists working in metalworking, mechanical, and HVAC fabrication environments will find this bit suitable for precision hole-making tasks.

This drill bit is rated for use on titanium as the primary workpiece material, making it appropriate for high-strength alloy work in aerospace, HVAC equipment fabrication, and industrial maintenance applications. The screw machine length format provides a shorter, stiffer profile compared to jobber-length bits, which reduces deflection and improves hole accuracy in confined or production drilling setups. It conforms to ANSI and NAS 907 standards, placing it within the R40C series for consistent dimensional and performance expectations across production runs.

Key Features

• 0.1875 inch (3/16 inch) diameter with a compact screw machine length profile for reduced deflection
• 135-degree split point reduces entry walking and lowers axial thrust during drilling
• Coated high speed steel construction rated for titanium and other high-strength workpiece materials
• Web-thinned, tapered web improves chip flow and cutting efficiency
• Right-hand spiral flute with 2.5xD flute-to-diameter ratio for effective chip evacuation
• Meets ANSI and NAS 907 standards; R40C series designation ensures dimensional consistency

Compatibility

Designed as an OEM-style replacement or production drill bit for use in standard straight-shank drill chucks and screw machine setups where a 3/16 inch diameter screw machine length bit conforming to ANSI and NAS 907 specifications is required.

Installation Notes

This bit is installed by machinists, millwrights, or qualified tradespeople using a compatible straight-shank drill chuck on a drill press, CNC machine, or handheld drill. Ensure the spindle and chuck are fully powered down and locked out before changing bits. Verify chuck jaw condition and proper bit seating depth before operation. Always use appropriate cutting fluid or lubricant when drilling titanium or hard alloys to extend tool life and maintain hole quality.