Precision Twist Drill 5999420 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999420 is a screw machine length drill bit designed for fast, accurate hole-making in tight spaces where a jobber-length bit will not fit. Built from high speed steel with a bright, uncoated finish, this bit features a 118-degree standard point angle and a right-hand spiral flute configuration. The straight-cylindrical shank seats securely in standard drill chucks. At 0.089 inches in diameter with an overall length of 1.75 inches and a flute length of 0.75 inches, it suits production drilling, fixture work, and precision assembly tasks performed by machinists and trade professionals working on light-gauge materials.

This bit is rated for use on titanium as its primary workpiece material and carries an ANSI designation, making it appropriate for controlled production environments and precision shop work. The web-thinned, tapered web construction reduces thrust at entry and improves chip evacuation during drilling. The 2.5xD flute-to-diameter ratio and high performance tool rating support consistent results in repetitive operations typical of screw machine and CNC drill press applications. This is a single-piece unit sold to the trade, with a minimum order quantity of 12 pieces per order.

Key Features

• 0.089 inch diameter, Wire Size 43, for precision small-hole drilling
• High speed steel construction with bright, uncoated finish
• 118-degree standard point angle for general-purpose entry
• Web-thinned, tapered web reduces thrust and improves chip clearance
• Right-hand cut with regular spiral flute for reliable chip evacuation
• Screw machine length (1.75 inches overall) for close-clearance work
• ANSI-compliant, Series R41 construction

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill chucks accepting a straight-cylindrical shank. Rated for drilling titanium and suitable for similar light-to-medium ferrous and non-ferrous materials in production and precision machining applications.

Installation Notes

Installation and use of this bit is performed by machinists or trade professionals operating drill presses, CNC machines, or screw machine equipment. Secure the straight-cylindrical shank fully in the chuck before operation and verify chuck runout is within acceptable limits for small-diameter tooling. Appropriate cutting fluid or coolant application is recommended when drilling titanium or hardened materials to extend tool life. Inspect the cutting edges before each use and discard bits showing chipping or deformation to avoid workpiece damage.