Precision Twist Drill 5998604 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998604 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, this bit features a 135-degree split point and web-thinned, tapered web construction that reduces thrust and improves chip evacuation. At 0.082 inches in diameter (Wire Size 45), it is suited for precision hole-making in tight tolerances. The overall length of 1-3/4 inches and flute length of 3/4 inch are characteristic of screw machine length geometry, making this bit ideal where clearance is limited. The right-hand spiral flute and straight-cylindrical shank ensure compatibility with standard drill chucks and screw machine setups.

This drill bit is rated for heavy-duty use and listed with a primary workpiece material of titanium, indicating it is built to handle hard and abrasive metals common in precision machining and metal fabrication environments. The R41C series designation and conformance to ANSI and NAS 907 specifications make it appropriate for shops operating under quality standards. Machinists, toolroom technicians, and trade professionals working in metal fabrication, aerospace component prep, or maintenance machining will find this bit a reliable choice for small-diameter hole production.

Key Features

• 135-degree split point reduces walking and cutting thrust on entry
• Web-thinned, tapered web construction improves chip flow and reduces heat buildup
• High speed steel construction with coated finish for extended tool life
• Screw machine length (1-3/4 inches overall) provides rigidity in short-reach applications
• Right-hand spiral flute with straight-cylindrical shank fits standard chucks
• Meets ANSI and NAS 907 specifications for dimensional and performance standards

Compatibility

Designed as a screw machine length drill bit in Wire Size 45 (0.082 inches) with a straight-cylindrical shank, compatible with standard drill chucks and screw machine spindles accepting that shank diameter and overall length profile.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tool operators familiar with small-diameter tooling. Secure the straight-cylindrical shank fully in the chuck and verify runout before operation. Use cutting fluid or coolant appropriate for the workpiece material to manage heat, particularly when drilling hard metals. Replace the bit at first sign of dulling to avoid breakage at this diameter.