Precision Twist Drill 5998685 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998685 is a screw machine length drill bit designed for high-performance drilling in demanding trade and industrial applications. Manufactured from high speed steel with a coated finish, it measures 0.196 inches (No. 9 wire size) in diameter with an overall length of 2.25 inches and a flute length of 1.1875 inches. The 135-degree split point and web-thinned, tapered web configuration reduce walking and cutting resistance at the point of entry. This bit is built to ANSI and NAS 907 standards, making it a reliable choice for professionals who need consistent performance and dimensional accuracy.

This drill bit is rated for use on titanium as its primary workpiece material, which also makes it well suited for other hard and tough metals encountered in mechanical, HVAC fabrication, plumbing rough-in, and general trade work. The screw machine length body is shorter than a jobber bit, providing added rigidity in drill press, CNC, or turret applications where chatter and deflection must be minimized. The 2.5xD flute-to-diameter ratio supports chip evacuation in short-hole drilling scenarios. Sold individually per package with a minimum order quantity of 12 units.

Key Features

• 135-degree split point reduces walking and lowers required feed force on entry
• Web-thinned tapered web improves cutting efficiency in hard metals including titanium
• High speed steel construction with coated finish for extended tool life
• Screw machine length provides added rigidity over jobber-length bits in fixed setups
• Right-hand spiral flute geometry promotes efficient chip evacuation
• Meets ANSI and NAS 907 standards for dimensional and performance consistency

Compatibility

Designed as a heavy duty screw machine length replacement drill bit in Series R41C, suitable for use in drill presses, CNC turret machines, and hand drills accepting a straight cylindrical shank in the 0.150 to 0.200 inch diameter range per ANSI standards.

Installation Notes

Install and replace drill bits only after the machine spindle has come to a complete stop and power has been locked out or disconnected. Secure the straight cylindrical shank fully in the chuck to the recommended grip depth before applying any feed load. When drilling titanium or other hard metals, use appropriate cutting fluid and avoid excessive feed rates that can cause premature edge failure. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection.