Precision Twist Drill 5999435 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999435 is a screw machine length drill bit engineered for high-performance drilling in demanding trade and industrial applications. Built from high speed steel with a coated finish, it measures 23/64 inch (0.3594 inches) in diameter with an overall length of 3-1/16 inches and a flute length of 1-3/4 inches. The 135-degree split point reduces walking and allows faster penetration with less feed pressure. A web-thinned, tapered web configuration further improves chip clearance and cutting efficiency. This bit is designed for use by machinists, tool-and-die professionals, and trade technicians who require consistent performance in short-length drilling setups.

The 5999435 is rated for primary use in titanium workpieces, making it suitable for aerospace, industrial maintenance, and precision fabrication environments where standard bits fall short. The screw machine length profile offers added rigidity over jobber-length bits, reducing deflection in applications where hole location accuracy matters. The straight-cylindrical shank fits standard drill chucks and machine spindles without adapters. The regular spiral flute with a 2.5xD flute-to-diameter ratio handles chip evacuation efficiently in short-hole operations.

Key Features

• 135-degree split point reduces bit walking and lowers required feed pressure
• Web-thinned tapered web improves chip clearance and cutting efficiency
• High speed steel construction with coated finish for extended tool life
• Screw machine length provides greater rigidity and reduced deflection versus jobber length
• Straight-cylindrical shank fits standard drill chucks and spindle collets without adapters
• Meets ANSI and NAS 907 standards for heavy-duty drill bit performance

Compatibility

Designed as a screw machine length replacement or production drill bit for use in drill presses, CNC machining centers, and hand-held drill motors accepting a straight-cylindrical shank. Falls within the 0.3500 to 0.4000 inch drill bit size range of the R40C series.

Installation Notes

Install this bit in a drill chuck or collet rated for the shank diameter and verify secure seating before operation. De-energize and lock out any machine tool before changing bits per standard OSHA lockout-tagout procedures. Use appropriate cutting fluid or coolant when drilling titanium to manage heat buildup and extend tool life. Inspect the cutting edges and split point for wear or chipping before each use and replace if the geometry is compromised.