Precision Twist Drill 5999312 Screw Machine Drill Bit

Product Description

The PRECISION TWIST DRILL 5999312 is a screw machine length drill bit designed for high-performance metal drilling applications. Built from high speed steel (HSS) with a bright/uncoated finish, it features a 0.201 inch diameter, a 118-degree standard point angle, and a regular spiral flute with a web-thinned, tapered web configuration. At 2.25 inches overall length with a 1.1875-inch flute length, this stubby-format bit provides added rigidity over jobber-length alternatives, reducing deflection in short-hole drilling operations. It is suited for machinists, toolroom technicians, and production drilling professionals.

This bit is rated for use on titanium as the primary workpiece material, making it appropriate for demanding aerospace, medical, and precision machining environments. The straight-cylindrical shank fits standard drill chucks without modification. The screw machine length format is common in CNC machining centers, turret lathes, drill presses, and hand-held operations where chuck clearance or rigidity is a priority. The 2.5xD flute-to-diameter ratio supports chip evacuation in moderate-depth holes.

Key Features

• 0.201 inch diameter, wire gauge size 7
• 118-degree standard point angle with web thinning for reduced thrust force
• High speed steel construction rated for titanium and general-purpose metals
• Screw machine (stub) length for increased rigidity and reduced deflection
• Bright/uncoated finish, right hand cut, regular spiral flute
• Meets ANSI standards, Series R41

Compatibility

Designed as an OEM-style screw machine length drill bit compatible with standard straight-shank drill chucks used in CNC machining centers, drill presses, and turret lathes requiring a 0.201 inch diameter stub-length bit.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with proper chuck torque and runout inspection procedures. Secure the straight-cylindrical shank fully in the chuck before operation to prevent slippage. Inspect the cutting edges for wear or chipping before each use, particularly when drilling titanium or other work-hardening alloys. Follow all applicable shop safety protocols and machine manufacturer guidelines during setup and drilling operations.