Precision Twist Drill 5998785 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998785 is a screw machine length drill bit designed for high-performance drilling in metal fabrication and machining applications. Built from high speed steel with a bright, uncoated finish, it measures 0.189 inches in diameter with a standard 118-degree point angle and a straight-cylindrical shank. The shortened screw machine length body provides added rigidity compared to jobber-length bits, reducing deflection in close-tolerance work. The spiral flute geometry and tapered web configuration promote efficient chip evacuation. This bit suits machinists, tool-and-die technicians, and production drilling operators working on CNC machines, drill presses, and manual lathes.

This drill bit is rated for use on titanium as its primary workpiece material, making it appropriate for aerospace, medical, and precision machining environments where harder, work-hardening materials are encountered. The Series R41 designation places it within PRECISION TWIST DRILL's general-purpose high-performance line. With an overall length of 2.25 inches and a flute length of 1.1875 inches, it fits standard toolholders and drill chucks across a wide range of machine setups. Each unit is sold individually and conforms to ANSI standards.

Key Features

• 0.189 inch diameter screw machine length body for added rigidity and reduced deflection
• High speed steel construction rated for drilling titanium and other demanding materials
• 118-degree standard point angle with web-thinned, tapered web for easier penetration
• Bright, uncoated finish maintains consistent tolerances across the cutting edge
• Right-hand spiral flute design promotes efficient chip evacuation during through-hole drilling
• Conforms to ANSI standards; Series R41 general-purpose high-performance classification

Compatibility

Designed as a direct-fit screw machine length drill bit for standard drill chucks and toolholders accepting a straight-cylindrical shank; falls within the 0.1500 to 0.2000 inch drill bit size range of the PRECISION TWIST DRILL R41 series.

Installation Notes

Installation and use of this bit should be performed by a qualified machinist or tooling technician familiar with proper drill press or CNC machine operation. Secure the straight-cylindrical shank firmly in the chuck before operation and verify runout before beginning a cut. When drilling titanium or other work-hardening materials, use appropriate cutting fluid and controlled feed rates to prevent work hardening and premature edge wear. Do not exceed the rated speed and feed parameters for the workpiece material and machine setup in use.