Precision Twist Drill 5998583 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998583 is a screw machine length drill bit designed for high-performance drilling in demanding trade and industrial applications. Built from high speed steel with a coated finish, this bit measures 0.209 inches (wire gauge #4) in diameter with an overall length of 2-3/8 inches and a flute length of 1-1/4 inches. The 135-degree split point reduces walking and allows faster penetration without a center punch. Web thinning further reduces thrust requirements, making this bit well suited for precision work in harder materials.

This drill bit is rated for primary use in titanium and is appropriate for heavy-duty machining and fabrication environments. The screw machine length format — shorter than jobber length — provides greater rigidity and improved accuracy in drill press, CNC, and turret lathe setups. It is commonly used by machinists, maintenance technicians, and fabricators who require tight-tolerance hole production in metals. The straight-cylindrical shank fits standard drill chucks without adapters.

Key Features

• 135-degree split point reduces drill walking and lowers required feed force
• Web-thinned, tapered web construction reduces thrust and improves chip evacuation
• Screw machine length provides added rigidity over jobber-length bits in tight setups
• High speed steel construction with coated finish for wear resistance
• Right-hand cut with regular spiral flute for standard drilling operations
• Meets ANSI and NAS 907 standards; Series R41C heavy-duty grade

Compatibility

Designed as an OEM-style replacement or direct-use bit for standard drill chucks accepting straight-cylindrical shanks; fits drill presses, CNC machining centers, and turret lathes configured for screw machine length tooling. No specific model compatibility was provided in the product data.

Installation Notes

Installation and use should be performed by a qualified machinist or maintenance technician familiar with rotating cutting tools and applicable shop safety standards. Ensure the machine spindle is fully stopped and the chuck is properly tightened before beginning any drilling operation. Use appropriate cutting fluid or coolant when drilling titanium and other hard metals to extend tool life and maintain hole quality. Inspect the cutting edges for wear or chipping before each use.