Precision Twist Drill 5998589 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5998589 is a screw machine length drill bit designed for high-performance metal drilling applications. It measures 0.096 inches in diameter with an overall length of 1-13/16 inches and a flute length of 13/16 inches. Built from coated high speed steel with a 135-degree split point and web-thinned, tapered web construction, this bit delivers reliable penetration and reduced thrust in demanding production environments. The straight-cylindrical shank seats securely in standard drill chucks. Machinists, tool-and-die workers, and production drilling professionals are the primary users of this type of tooling.

This drill bit is suited for drilling titanium and similarly hard or work-hardening materials where a rigid, short-flute geometry minimizes deflection and walking. The screw machine length format makes it appropriate for turret lathes, drill presses, and CNC machining centers where stub-length rigidity is preferred over jobber-length reach. Its 2.5xD flute-to-diameter ratio provides adequate chip evacuation for shallow-to-moderate depth holes in production settings. The R41C series targets heavy-duty, high-precision drilling tasks and meets ANSI and NAS 907 standards.

Key Features

• 0.096 inch diameter wire size #41 with screw machine (stub) length for maximum rigidity
• 135-degree split point reduces walking and lowers required feed force at entry
• Web-thinned, tapered web construction improves cutting efficiency and chip flow
• Coated high speed steel construction extends tool life in titanium and hard alloys
• Right-hand spiral flute with 2.5xD flute ratio handles chip clearance in production cycles
• Meets ANSI and NAS 907 specifications for dimensional and performance consistency

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit compatible with standard straight-cylindrical shank chucks and collets on drill presses, turret lathes, and CNC machining centers. Primary workpiece material compatibility is stated as titanium; the coated HSS construction also supports drilling of other hard metals and alloys in production environments.

Installation Notes

Installation and use should be performed by qualified machinists or tooling professionals familiar with production drilling practices. Secure the straight-cylindrical shank fully in a matched chuck or collet before operation and verify runout before starting a production run. Apply appropriate cutting fluid for titanium or hard-alloy workpieces to manage heat and extend tool life. Follow shop safety protocols and applicable ANSI machining standards when setting feed rates and spindle speeds.